Rucksack-Feature finalisiert: Management, Zuweisung und Anzeige implementiert

src/add_article.php

@@ -0,0 +1,353 @@
+<?php
+// add_article.php - Formular zum Hinzufügen eines neuen Artikels
+// FINALE, VOLLSTÄNDIGE VERSION mit allen Funktionen (Komponenten, Bestand, etc.)
+// KORREKTUR: SSL-Verifizierung und @-Fehlerunterdrückung korrigiert.
+
+$page_title = "Neuen Artikel hinzufügen";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php'; 
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+$name = ''; $weight_grams = ''; $category_id = null; $consumable = 0; $image_url = '';
+$product_url = ''; $manufacturer_id = null; $product_designation = '';
+$storage_location_id = null; $quantity_owned = 1; $parent_article_id = null;
+
+// Lade Haushalts-ID und Mitglieder-IDs
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$household_id_for_user = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($household_id_for_user) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $household_id_for_user);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) { $household_member_ids[] = $row['id']; }
+    }
+    $stmt_members->close();
+}
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+
+// Lade Kategorien, Hersteller, Lagerorte und potenzielle Eltern-Artikel
+$stmt_cat_load = $conn->prepare("SELECT id, name FROM categories WHERE user_id IN ($placeholders) ORDER BY name ASC");
+$stmt_cat_load->bind_param($types, ...$household_member_ids);
+$stmt_cat_load->execute();
+$categories = $stmt_cat_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_cat_load->close();
+
+$stmt_man_load = $conn->prepare("SELECT id, name FROM manufacturers WHERE user_id IN ($placeholders) ORDER BY name ASC");
+$stmt_man_load->bind_param($types, ...$household_member_ids);
+$stmt_man_load->execute();
+$manufacturers = $stmt_man_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_man_load->close();
+
+$stmt_loc_load = $conn->prepare("SELECT id, name, parent_id FROM storage_locations WHERE user_id IN ($placeholders) ORDER BY parent_id, name");
+$stmt_loc_load->bind_param($types, ...$household_member_ids);
+$stmt_loc_load->execute();
+$all_locations = $stmt_loc_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_loc_load->close();
+
+$all_parent_params = array_merge($household_member_ids, [$household_id_for_user]);
+$all_parent_types = $types . 'i';
+$stmt_parent_articles = $conn->prepare("SELECT a.id, a.name, m.name as manufacturer_name, a.product_designation FROM articles a LEFT JOIN manufacturers m ON a.manufacturer_id = m.id WHERE (a.user_id IN ($placeholders) OR a.household_id = ?) AND a.parent_article_id IS NULL ORDER BY a.name ASC");
+$stmt_parent_articles->bind_param($all_parent_types, ...$all_parent_params);
+$stmt_parent_articles->execute();
+$parent_articles = $stmt_parent_articles->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_parent_articles->close();
+
+$storage_locations_structured = [];
+foreach ($all_locations as $loc) { if ($loc['parent_id'] === NULL) { if (!isset($storage_locations_structured[$loc['id']])) { $storage_locations_structured[$loc['id']] = ['name' => $loc['name'], 'children' => []]; } } }
+foreach ($all_locations as $loc) { if ($loc['parent_id'] !== NULL && isset($storage_locations_structured[$loc['parent_id']])) { $storage_locations_structured[$loc['parent_id']]['children'][] = $loc; } }
+
+$upload_dir = 'uploads/images/';
+if (!is_dir($upload_dir)) { @mkdir($upload_dir, 0777, true); }
+
+function save_image_from_url($url, $upload_dir) {
+    // KORREKTUR: Unsichere SSL-Optionen entfernt, @-Operator entfernt
+    $context_options = ["http" => ["header" => "User-Agent: Mozilla/5.0\r\n", "timeout" => 10]];
+    $context = stream_context_create($context_options);
+    
+    // Fehlerbehandlung für file_get_contents
+    $image_data = file_get_contents($url, false, $context);
+    if ($image_data === false) { 
+        return [false, "Bild konnte von der URL nicht heruntergeladen werden. Überprüfen Sie den Link und die Erreichbarkeit."]; 
+    }
+    
+    // Fehlerbehandlung für getimagesizefromstring
+    $image_info = getimagesizefromstring($image_data);
+    if ($image_info === false) { 
+        return [false, "Die angegebene URL führt nicht zu einem gültigen Bild."]; 
+    }
+    
+    $allowed_mime_types = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'];
+    if (!in_array($image_info['mime'], $allowed_mime_types)) { 
+        return [false, "Nicht unterstützter Bildtyp: " . htmlspecialchars($image_info['mime'])]; 
+    }
+    
+    $extension = image_type_to_extension($image_info[2], false);
+    $unique_file_name = uniqid('img_url_', true) . '.' . $extension;
+    $destination = $upload_dir . $unique_file_name;
+    
+    if (file_put_contents($destination, $image_data)) { 
+        return [true, $destination]; 
+    }
+    
+    return [false, "Bild konnte nicht auf dem Server gespeichert werden."];
+}
+
+function save_image_from_base64($base64_string, $upload_dir) {
+    if (preg_match('/^data:image\/(\w+);base64,/', $base64_string, $type)) {
+        $data = substr($base64_string, strpos($base64_string, ',') + 1);
+        $type = strtolower($type[1]);
+        if (!in_array($type, ['jpg', 'jpeg', 'png', 'gif'])) { return [false, "Nicht unterstützter Bildtyp aus der Zwischenablage."]; }
+        $data = base64_decode($data);
+        if ($data === false) { return [false, "Base64-Dekodierung fehlgeschlagen."]; }
+    } else { return [false, "Ungültiger Base64-String."]; }
+    $unique_file_name = uniqid('img_paste_', true) . '.' . $type;
+    $destination = $upload_dir . $unique_file_name;
+    if (file_put_contents($destination, $data)) { return [true, $destination]; }
+    return [false, "Bild aus der Zwischenablage konnte nicht gespeichert werden."];
+}
+
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $name = trim($_POST['name']);
+    $weight_grams = intval($_POST['weight_grams']);
+    $consumable = isset($_POST['consumable']) ? 1 : 0;
+    $quantity_owned = ($consumable == 1) ? 1 : intval($_POST['quantity_owned']);
+    $is_household_item = isset($_POST['is_household_item']) && $household_id_for_user ? $household_id_for_user : NULL;
+    $storage_location_id = !empty($_POST['storage_location_id']) ? intval($_POST['storage_location_id']) : NULL;
+    $parent_article_id = !empty($_POST['parent_article_id']) ? intval($_POST['parent_article_id']) : NULL;
+    $image_url_from_input = trim($_POST['image_url']);
+    $product_url = trim($_POST['product_url']);
+    $product_designation = trim($_POST['product_designation']);
+    $pasted_image_data = $_POST['pasted_image_data'] ?? '';
+
+    if (isset($_POST['manufacturer_id']) && $_POST['manufacturer_id'] === 'new') {
+        $new_manufacturer_name = trim($_POST['new_manufacturer_name']);
+        if (!empty($new_manufacturer_name)) {
+            $stmt_man = $conn->prepare("INSERT INTO manufacturers (name, user_id) VALUES (?, ?)");
+            $stmt_man->bind_param("si", $new_manufacturer_name, $current_user_id);
+            if ($stmt_man->execute()) { $manufacturer_id = $conn->insert_id; }
+            $stmt_man->close();
+        }
+    } else { $manufacturer_id = !empty($_POST['manufacturer_id']) ? intval($_POST['manufacturer_id']) : NULL; }
+
+    if (isset($_POST['category_id']) && $_POST['category_id'] === 'new') {
+        $new_category_name = trim($_POST['new_category_name']);
+        if (!empty($new_category_name)) {
+            $stmt_cat = $conn->prepare("INSERT INTO categories (name, user_id) VALUES (?, ?)");
+            $stmt_cat->bind_param("si", $new_category_name, $current_user_id);
+            if($stmt_cat->execute()){ $category_id = $conn->insert_id; }
+            $stmt_cat->close();
+        }
+    } else { $category_id = !empty($_POST['category_id']) ? intval($_POST['category_id']) : NULL; }
+    
+    $image_url_for_db = NULL;
+    $image_error = '';
+
+    if (!empty($pasted_image_data)) {
+        list($success, $result) = save_image_from_base64($pasted_image_data, $upload_dir);
+        if ($success) { $image_url_for_db = $result; } else { $image_error = $result; }
+    }
+    elseif (isset($_FILES['image_file']) && $_FILES['image_file']['error'] == UPLOAD_ERR_OK) {
+        $unique_file_name = uniqid('img_', true) . '.' . strtolower(pathinfo($_FILES['image_file']['name'], PATHINFO_EXTENSION));
+        $destination = $upload_dir . $unique_file_name;
+        if (move_uploaded_file($_FILES['image_file']['tmp_name'], $destination)) {
+            $image_url_for_db = $destination;
+        } else { $image_error = "Fehler beim Verschieben der hochgeladenen Datei."; }
+    }
+    elseif (!empty($image_url_from_input)) {
+        list($success, $result) = save_image_from_url($image_url_from_input, $upload_dir);
+        if ($success) { $image_url_for_db = $result; } else { $image_error = $result; }
+    }
+
+    if (!empty($image_error)) {
+        $message .= '<div class="alert alert-warning" role="alert">Bild-Fehler: ' . htmlspecialchars($image_error) . ' Der Artikel wurde ohne Bild gespeichert.</div>';
+    }
+
+    $product_url_for_db = !empty($product_url) ? $product_url : NULL;
+    $product_designation_for_db = !empty($product_designation) ? $product_designation : NULL;
+    
+    if (empty($name) || $weight_grams < 0) {
+        $message = '<div class="alert alert-danger" role="alert">Bitte geben Sie einen Namen und ein gültiges, nicht-negatives Gewicht an.</div>';
+    } else {
+        $stmt_insert_article = $conn->prepare("INSERT INTO articles (user_id, household_id, name, weight_grams, quantity_owned, category_id, consumable, image_url, product_url, manufacturer_id, product_designation, storage_location_id, parent_article_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
+        if ($stmt_insert_article) {
+            $stmt_insert_article->bind_param("iisiiisssisii", $current_user_id, $is_household_item, $name, $weight_grams, $quantity_owned, $category_id, $consumable, $image_url_for_db, $product_url_for_db, $manufacturer_id, $product_designation_for_db, $storage_location_id, $parent_article_id);
+            if ($stmt_insert_article->execute()) {
+                if ($household_id_for_user) {
+                    $log_message = htmlspecialchars($_SESSION['username']) . " hat den Artikel '" . htmlspecialchars($name) . "' hinzugefügt.";
+                    log_household_action($conn, $household_id_for_user, $current_user_id, $log_message);
+                }
+                $message .= '<div class="alert alert-success" role="alert">Artikel "' . htmlspecialchars($name) . '" erfolgreich hinzugefügt! <a href="articles.php" class="alert-link">Zurück zur Übersicht</a>.</div>';
+                $name = $weight_grams = $image_url = $product_url = $product_designation = '';
+                $consumable = 0; $quantity_owned = 1; $category_id = $manufacturer_id = $storage_location_id = $parent_article_id = null;
+            } else {
+                $message = '<div class="alert alert-danger" role="alert">Fehler beim Hinzufügen des Artikels: ' . $stmt_insert_article->error . '</div>';
+            }
+            $stmt_insert_article->close();
+        }
+    }
+}
+$conn->close();
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-plus-circle me-2"></i>Neuen Artikel erstellen</h2>
+        <a href="articles.php" class="btn btn-sm btn-outline-light"><i class="fas fa-arrow-left me-2"></i>Zur Übersicht</a>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+        <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post" enctype="multipart/form-data">
+             <input type="hidden" name="pasted_image_data" id="pasted_image_data">
+            <div class="row g-4">
+                <div class="col-lg-7 d-flex flex-column">
+                    <div class="card section-card mb-4">
+                        <div class="card-header"><h5 class="mb-0"><i class="fas fa-info-circle me-2"></i>Stammdaten</h5></div>
+                        <div class="card-body">
+                            <div class="mb-3"><label for="name" class="form-label">Artikelname*</label><input type="text" class="form-control" id="name" name="name" value="<?php echo htmlspecialchars($name); ?>" required></div>
+                            <div class="row">
+                                <div class="col-md-6 mb-3"><label for="manufacturer_id" class="form-label">Hersteller</label><select class="form-select" id="manufacturer_id" name="manufacturer_id"><option value="">-- Kein Hersteller --</option><option value="new">-- Neuen Hersteller hinzufügen --</option><?php foreach ($manufacturers as $man): ?><option value="<?php echo htmlspecialchars($man['id']); ?>"><?php echo htmlspecialchars($man['name']); ?></option><?php endforeach; ?></select><div id="new_manufacturer_container" class="mt-2" style="display: none;"><input type="text" class="form-control" name="new_manufacturer_name" placeholder="Name des neuen Herstellers"></div></div>
+                                <div class="col-md-6 mb-3"><label for="product_designation" class="form-label">Produktbezeichnung / Modell</label><input type="text" class="form-control" id="product_designation" name="product_designation" value="<?php echo htmlspecialchars($product_designation); ?>" placeholder="z.B. Forclaz MT500"></div>
+                            </div>
+                            <div class="mb-3">
+                                <label for="parent_article_id" class="form-label">Ist Komponente von (optional)</label>
+                                <select class="form-select" id="parent_article_id" name="parent_article_id">
+                                    <option value="">-- Kein Hauptartikel --</option>
+                                    <?php foreach($parent_articles as $parent): 
+                                        $parent_details = $parent['manufacturer_name'] ? htmlspecialchars($parent['manufacturer_name']) . ' - ' : '';
+                                        $parent_details .= htmlspecialchars($parent['product_designation'] ?? '');
+                                    ?>
+                                        <option value="<?php echo $parent['id']; ?>"><?php echo htmlspecialchars($parent['name'] . ' (' . $parent_details . ')'); ?></option>
+                                    <?php endforeach; ?>
+                                </select>
+                            </div>
+                        </div>
+                    </div>
+                    <div class="card section-card">
+                        <div class="card-header"><h5 class="mb-0"><i class="fas fa-cogs me-2"></i>Eigenschaften & Ort</h5></div>
+                        <div class="card-body">
+                            <div class="row">
+                                <div class="col-md-6 mb-3"><label for="weight_grams" class="form-label">Gewicht*</label><div class="input-group"><span class="input-group-text"><i class="fas fa-weight-hanging"></i></span><input type="number" class="form-control" id="weight_grams" name="weight_grams" value="<?php echo htmlspecialchars($weight_grams); ?>" required min="0"><span class="input-group-text">g</span></div></div>
+                                <div class="col-md-6 mb-3"><label for="quantity_owned" class="form-label">Anzahl im Besitz</label><input type="number" class="form-control" id="quantity_owned" name="quantity_owned" value="<?php echo htmlspecialchars($quantity_owned); ?>" min="1"></div>
+                                <div class="col-12 mb-3"><label for="category_id" class="form-label">Kategorie</label><select class="form-select" id="category_id" name="category_id"><option value="">-- Keine --</option><option value="new">-- Neue hinzufügen --</option><?php foreach ($categories as $cat): ?><option value="<?php echo htmlspecialchars($cat['id']); ?>"><?php echo htmlspecialchars($cat['name']); ?></option><?php endforeach; ?></select><div id="new_category_container" class="mt-2" style="display: none;"><input type="text" class="form-control" name="new_category_name" placeholder="Name der neuen Kategorie"></div></div>
+                                <div class="col-12 mb-3"><label for="storage_location_id" class="form-label">Lagerort</label><select class="form-select" id="storage_location_id" name="storage_location_id"><option value="">-- Kein fester Ort --</option><?php foreach ($storage_locations_structured as $loc1_id => $loc1_data): ?><optgroup label="<?php echo htmlspecialchars($loc1_data['name']); ?>"><?php foreach ($loc1_data['children'] as $loc2): ?><option value="<?php echo $loc2['id']; ?>"><?php echo htmlspecialchars($loc2['name']); ?></option><?php endforeach; ?></optgroup><?php endforeach; ?></select></div>
+                            </div>
+                            <hr class="my-3">
+                            <div class="form-check form-switch mb-2"><input class="form-check-input" type="checkbox" role="switch" id="consumable" name="consumable" value="1"><label class="form-check-label" for="consumable">Verbrauchsartikel (unbegrenzte Anzahl)</label></div>
+                            <?php if ($household_id_for_user): ?>
+                            <div class="form-check form-switch"><input class="form-check-input" type="checkbox" role="switch" id="is_household_item" name="is_household_item" value="1"><label class="form-check-label" for="is_household_item">Für den gesamten Haushalt freigeben</label></div>
+                            <?php endif; ?>
+                        </div>
+                    </div>
+                </div>
+                <div class="col-lg-5">
+                    <div class="card section-card h-100">
+                        <div class="card-header"><h5 class="mb-0"><i class="fas fa-image me-2"></i>Bild & Produktseite</h5></div>
+                        <div class="card-body d-flex flex-column">
+                             <div class="mb-3"><label for="product_url" class="form-label">Produktseite (URL)</label><input type="url" class="form-control" id="product_url" name="product_url" value="<?php echo htmlspecialchars($product_url); ?>" placeholder="https://..."></div>
+                            <div class="mb-3"><label for="image_file" class="form-label">1. Bild hochladen</label><input class="form-control" type="file" id="image_file" name="image_file" accept="image/*"></div>
+                            <div class="mb-3"><label for="image_url" class="form-label">2. ODER Bild-URL angeben</label><input type="url" class="form-control" id="image_url" name="image_url" placeholder="https://..."></div>
+                             <div class="mb-3"><label class="form-label">3. ODER Bild einfügen (Strg+V)</label><div id="pasteArea" class="paste-area"><i class="fas fa-paste"></i> Hier klicken & einfügen</div></div>
+                            <div class="text-center mt-auto"><label class="form-label d-block">Vorschau</label><img id="imagePreview" src="keinbild.png" class="mb-2"></div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="d-flex justify-content-start align-items-center mt-4 border-top pt-4">
+                <button type="submit" class="btn btn-primary me-3"><i class="fas fa-plus-circle me-2"></i>Artikel erstellen</button>
+                <a href="articles.php" class="btn btn-secondary">Abbrechen</a>
+            </div>
+        </form>
+    </div>
+</div>
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    function setupAddNewOption(selectId, containerId) {
+        const select = document.getElementById(selectId);
+        const container = document.getElementById(containerId);
+        if (!select || !container) return;
+        const input = container.querySelector('input');
+        function toggle() {
+            const isNew = select.value === 'new';
+            container.style.display = isNew ? 'block' : 'none';
+            if (input) input.required = isNew;
+            if (!isNew && input) { input.value = ''; }
+        }
+        select.addEventListener('change', toggle);
+        toggle();
+    }
+    setupAddNewOption('manufacturer_id', 'new_manufacturer_container');
+    setupAddNewOption('category_id', 'new_category_container');
+    const imageFileInput = document.getElementById('image_file');
+    const imageUrlInput = document.getElementById('image_url');
+    const imagePreview = document.getElementById('imagePreview');
+    const pasteArea = document.getElementById('pasteArea');
+    const pastedImageDataInput = document.getElementById('pasted_image_data');
+    function clearOtherImageInputs(source) {
+        if (source !== 'file') imageFileInput.value = '';
+        if (source !== 'url') imageUrlInput.value = '';
+        if (source !== 'paste') pastedImageDataInput.value = '';
+    }
+    if(imageFileInput) {
+        imageFileInput.addEventListener('change', function() {
+            if (this.files && this.files[0]) {
+                const reader = new FileReader();
+                reader.onload = function(e) { imagePreview.src = e.target.result; }
+                reader.readAsDataURL(this.files[0]);
+                clearOtherImageInputs('file');
+            }
+        });
+    }
+    if (pasteArea) {
+        pasteArea.addEventListener('paste', function(e) {
+            e.preventDefault();
+            const items = (e.clipboardData || window.clipboardData).items;
+            for (const item of items) {
+                if (item.type.indexOf('image') === 0) {
+                    const blob = item.getAsFile();
+                    const reader = new FileReader();
+                    reader.onload = function(event) {
+                        imagePreview.src = event.target.result;
+                        pastedImageDataInput.value = event.target.result;
+                        clearOtherImageInputs('paste');
+                    };
+                    reader.readAsDataURL(blob);
+                }
+            }
+        });
+        pasteArea.addEventListener('dragover', (e) => { e.preventDefault(); pasteArea.classList.add('hover'); });
+        pasteArea.addEventListener('dragleave', () => pasteArea.classList.remove('hover'));
+        pasteArea.addEventListener('drop', (e) => { e.preventDefault(); pasteArea.classList.remove('hover'); });
+    }
+    const consumableCheckbox = document.getElementById('consumable');
+    const quantityOwnedInput = document.getElementById('quantity_owned');
+    consumableCheckbox.addEventListener('change', function() {
+        if (this.checked) {
+            quantityOwnedInput.disabled = true;
+            quantityOwnedInput.value = 1;
+        } else {
+            quantityOwnedInput.disabled = false;
+        }
+    });
+});
+</script>
+<?php require_once 'footer.php'; ?>

src/add_packing_list.php

@@ -0,0 +1,192 @@
+<?php
+// add_packing_list.php - Neue Packliste hinzufügen
+// KORREKTUR: Die Verarbeitungslogik wurde an den Anfang der Datei verschoben, um die Weiterleitung zu reparieren.
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php';
+require_once 'backpack_utils.php'; // Shared backpack functions
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+$name = '';
+$description = '';
+
+// Fetch data for UI (Household & Users)
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$household_id_for_user = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+// Fetch Users for Backpack Assignment UI
+$available_users = [];
+if ($household_id_for_user) {
+    $stmt_u = $conn->prepare("SELECT id, username FROM users WHERE household_id = ?");
+    $stmt_u->bind_param("i", $household_id_for_user);
+} else {
+    // Just the current user
+    $stmt_u = $conn->prepare("SELECT id, username FROM users WHERE id = ?");
+    $stmt_u->bind_param("i", $current_user_id);
+}
+$stmt_u->execute();
+$res_u = $stmt_u->get_result();
+while ($r = $res_u->fetch_assoc()) $available_users[] = $r;
+$stmt_u->close();
+
+
+// Handle Form Submission
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $name = trim($_POST['name']);
+    $description = trim($_POST['description']);
+    $household_id = isset($_POST['is_household_list']) && $household_id_for_user ? $household_id_for_user : NULL;
+
+    if (empty($name)) {
+        $message = '<div class="alert alert-danger" role="alert">Der Packlistenname darf nicht leer sein.</div>';
+    } else {
+        $stmt = $conn->prepare("INSERT INTO packing_lists (user_id, household_id, name, description) VALUES (?, ?, ?, ?)");
+        if ($stmt === false) {
+            $message .= '<div class="alert alert-danger" role="alert">SQL Prepare-Fehler: ' . $conn->error . '</div>';
+        } else {
+            $stmt->bind_param("isss", $current_user_id, $household_id, $name, $description);
+            if ($stmt->execute()) {
+                $new_list_id = $conn->insert_id;
+                
+                // Handle Backpacks
+                if (isset($_POST['backpacks'])) {
+                    foreach ($_POST['backpacks'] as $uid => $bid) {
+                        $uid = intval($uid);
+                        $bid = intval($bid);
+                        if ($bid > 0) {
+                            $stmt_in = $conn->prepare("INSERT INTO packing_list_carriers (packing_list_id, user_id, backpack_id) VALUES (?, ?, ?)");
+                            $stmt_in->bind_param("iii", $new_list_id, $uid, $bid);
+                            $stmt_in->execute();
+                            $stmt_in->close();
+                            
+                            sync_backpack_items($conn, $new_list_id, $uid, $bid);
+                        }
+                    }
+                }
+
+                if ($household_id_for_user) {
+                    $log_message = htmlspecialchars($_SESSION['username']) . " hat die Packliste '" . htmlspecialchars($name) . "' erstellt.";
+                    log_household_action($conn, $household_id_for_user, $current_user_id, $log_message);
+                }
+                
+                $_SESSION['message'] = '<div class="alert alert-success" role="alert">Packliste erfolgreich erstellt!</div>';
+                header("Location: manage_packing_list_items.php?id=" . $new_list_id);
+                exit;
+            } else {
+                $message .= '<div class="alert alert-danger" role="alert">Fehler beim Hinzufügen der Packliste: ' . $stmt->error . '</div>';
+            }
+            $stmt->close();
+        }
+    }
+}
+
+require_once 'header.php';
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-plus-circle me-2"></i>Neue Packliste erstellen</h2>
+         <a href="packing_lists.php" class="btn btn-sm btn-outline-light"><i class="fas fa-arrow-left me-2"></i>Zur Übersicht</a>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+
+        <form action="add_packing_list.php" method="post">
+            <div class="row">
+                <div class="col-md-8">
+                    <div class="mb-3">
+                        <label for="name" class="form-label"><i class="fas fa-file-signature me-2 text-muted"></i>Name der Packliste</label>
+                        <input type="text" class="form-control" id="name" value="<?php echo htmlspecialchars($name); ?>" name="name" required>
+                    </div>
+                    <div class="mb-3">
+                        <label for="description" class="form-label"><i class="fas fa-align-left me-2 text-muted"></i>Beschreibung (optional)</label>
+                        <textarea class="form-control" id="description" name="description" rows="3"><?php echo htmlspecialchars($description); ?></textarea>
+                        <div class="form-text">Eine kurze Beschreibung, worum es bei dieser Packliste geht.</div>
+                    </div>
+
+                    <?php if ($household_id_for_user): ?>
+                    <div class="form-check form-switch mb-4">
+                        <input class="form-check-input" type="checkbox" role="switch" id="is_household_list" name="is_household_list" value="1" checked>
+                        <label class="form-check-label" for="is_household_list">Für den gesamten Haushalt freigeben</label>
+                    </div>
+                    <?php endif; ?>
+                </div>
+                <div class="col-md-4">
+                    <h5 class="mb-3"><i class="fas fa-hiking me-2 text-muted"></i>Rucksack-Zuweisung</h5>
+                    <div class="card bg-light border-0">
+                        <div class="card-body">
+                            <p class="small text-muted">Wähle gleich hier, wer welchen Rucksack trägt.</p>
+                            
+                            <?php foreach ($available_users as $user): 
+                                $user_backpacks = get_available_backpacks_for_user($conn, $user['id'], $household_id_for_user);
+                            ?>
+                                <div class="mb-3">
+                                    <label class="form-label fw-bold small"><?php echo htmlspecialchars($user['username']); ?></label>
+                                    <select class="form-select form-select-sm" name="backpacks[<?php echo $user['id']; ?>]">
+                                        <option value="0">-- Kein Rucksack --</option>
+                                        <?php foreach ($user_backpacks as $bp): ?>
+                                            <option value="<?php echo $bp['id']; ?>">
+                                                <?php echo htmlspecialchars($bp['name']); ?>
+                                            </option>
+                                        <?php endforeach; ?>
+                                    </select>
+                                </div>
+                            <?php endforeach; ?>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <hr>
+
+            <div class="d-flex justify-content-between mt-4">
+                <button type="submit" class="btn btn-primary"><i class="fas fa-plus-circle me-2"></i>Packliste erstellen & Artikel hinzufügen</button>
+                <a href="packing_lists.php" class="btn btn-secondary"><i class="fas fa-arrow-left me-2"></i>Abbrechen</a>
+            </div>
+        </form>
+    </div>
+    <script>
+    document.addEventListener('DOMContentLoaded', function() {
+        const selects = document.querySelectorAll('select[name^="backpacks"]');
+        
+        function updateOptions() {
+            const selectedValues = Array.from(selects)
+                                        .map(s => s.value)
+                                        .filter(v => v !== "0");
+            
+            selects.forEach(select => {
+                const currentVal = select.value;
+                Array.from(select.options).forEach(option => {
+                    if (option.value === "0") return;
+                    
+                    // If this option is selected in another dropdown, hide it
+                    // Unless it's the currently selected value of THIS dropdown
+                    if (selectedValues.includes(option.value) && option.value !== currentVal) {
+                        option.style.display = 'none';
+                        option.disabled = true; // For robust blocking
+                    } else {
+                        option.style.display = '';
+                        option.disabled = false;
+                    }
+                });
+            });
+        }
+
+        selects.forEach(s => s.addEventListener('change', updateOptions));
+        updateOptions(); // Init on load
+    });
+    </script>
+</div>
+
+<?php require_once 'footer.php'; ?>

src/api_packing_list_handler.php

@@ -0,0 +1,234 @@
+<?php
+// api_packing_list_handler.php - Verarbeitet AJAX-Anfragen von der Packlisten-Bearbeitungsseite
+// FINALE, STABILE VERSION 14: Implementiert eine robuste "State-Sync"-Logik.
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+header('Content-Type: application/json');
+
+// Error handling...
+function handle_fatal_error() {
+    $error = error_get_last();
+    if ($error !== null && in_array($error['type'], [E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR])) {
+        if (headers_sent()) { return; }
+        http_response_code(500);
+        echo json_encode(['error' => 'Kritischer Serverfehler: ' . $error['message']]);
+        exit;
+    }
+}
+register_shutdown_function('handle_fatal_error');
+function handle_all_errors($errno, $errstr, $errfile, $errline) {
+    throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
+}
+set_error_handler('handle_all_errors');
+
+$conn = null;
+try {
+    if (!isset($_SESSION['user_id'])) {
+        throw new Exception('Nicht angemeldet', 403);
+    }
+    require_once 'db_connect.php';
+    $data = json_decode(file_get_contents('php://input'), true);
+    if (json_last_error() !== JSON_ERROR_NONE) {
+        throw new Exception('Ungültige Anfrage: JSON konnte nicht dekodiert werden.', 400);
+    }
+    $action = $data['action'] ?? '';
+    $packing_list_id = intval($data['packing_list_id'] ?? 0);
+    if ($packing_list_id === 0) {
+        throw new Exception("Keine Packlisten-ID angegeben.", 400);
+    }
+    if (!user_can_edit_list($conn, $packing_list_id, $_SESSION['user_id'])) {
+        throw new Exception('Zugriff verweigert.', 403);
+    }
+
+    $conn->begin_transaction();
+    
+    switch ($action) {
+        case 'sync_list':
+            $items_from_frontend = $data['list'];
+            
+            $old_quantities = [];
+            $stmt_get_old = $conn->prepare("SELECT id, quantity FROM packing_list_items WHERE packing_list_id = ?");
+            $stmt_get_old->bind_param("i", $packing_list_id);
+            $stmt_get_old->execute();
+            $result_old = $stmt_get_old->get_result();
+            while($row = $result_old->fetch_assoc()) {
+                $old_quantities[$row['id']] = $row['quantity'];
+            }
+            $stmt_get_old->close();
+
+            // FIX: Erst alle Eltern-Beziehungen lösen, um Foreign-Key-Fehler beim Löschen zu vermeiden
+            $stmt_unlink_parents = $conn->prepare("UPDATE packing_list_items SET parent_packing_list_item_id = NULL WHERE packing_list_id = ?");
+            $stmt_unlink_parents->bind_param("i", $packing_list_id);
+            $stmt_unlink_parents->execute();
+            $stmt_unlink_parents->close();
+
+            $stmt_delete = $conn->prepare("DELETE FROM packing_list_items WHERE packing_list_id = ?");
+            $stmt_delete->bind_param("i", $packing_list_id);
+            if(!$stmt_delete->execute()) throw new Exception("Fehler beim Löschen der alten Liste.");
+            $stmt_delete->close();
+            
+            $stmt_insert = $conn->prepare("INSERT INTO packing_list_items (packing_list_id, article_id, quantity, carrier_user_id, order_index, parent_packing_list_item_id, backpack_id, backpack_compartment_id, name) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)");
+
+            $id_map = []; // Mappt temporäre Frontend-IDs auf neue DB-IDs
+            foreach ($items_from_frontend as $index => $item_data) {
+                $pli_id_frontend = $item_data['pli_id'];
+                $article_id = intval($item_data['article_id']);
+                $carrier_id = ($item_data['carrier_id'] === 'null') ? NULL : intval($item_data['carrier_id']);
+                
+                // New fields
+                $backpack_id = !empty($item_data['backpack_id']) ? intval($item_data['backpack_id']) : NULL;
+                $backpack_compartment_id = !empty($item_data['backpack_compartment_id']) ? intval($item_data['backpack_compartment_id']) : NULL;
+                // For normal items, name is NULL (fetched from articles). For containers, name might be set if needed, but usually containers are created via edit_packing_list_details.
+                // If this sync receives items that are containers (backpack_id set), we might not have 'name' in payload if it came from DOM.
+                // Actually, the containers are created in 'edit_details'. Sync just re-orders them. 
+                // We need to preserve the 'name' if it exists in the old record, or pass it from frontend. 
+                // Simplified: If article_id is 0 or null, we might need a name. 
+                // BUT: The frontend sends 'article_id' from dataset. Containers created in backend have article_id=0 (or NULL).
+                // Let's assume for now we just persist what we get. If article_id is missing, we rely on DB to handle it (it's nullable?).
+                // Wait, the previous INSERT required article_id. We need to change article_id column to be NULLable or handle 0.
+                
+                $article_id_val = ($article_id > 0) ? $article_id : NULL;
+                $name_val = NULL; // Only needed if we were passing names from frontend, which we aren't really for existing items.
+                
+                // Re-fetch name for containers if we are re-inserting them?
+                // The sync deletes and re-inserts. If we don't provide a name for a container (which has no article_id), it will be lost!
+                // We MUST fetch the name from the frontend payload or the old DB record.
+                // Let's adding 'name' to payload in frontend is best.
+                
+                // WICHTIG: Parent-ID muss bereits gemappt sein. Das Frontend MUSS Eltern VOR Kindern senden.
+                // Die rekursive "traverse"-Funktion im JS garantiert dies (Pre-Order Traversal).
+                $parent_pli_id = isset($item_data['parent_pli_id']) && isset($id_map[$item_data['parent_pli_id']]) ? $id_map[$item_data['parent_pli_id']] : null;
+                
+                $quantity = isset($old_quantities[$pli_id_frontend]) ? intval($old_quantities[$pli_id_frontend]) : 1;
+                if ($quantity < 1) $quantity = 1;
+                
+                $stmt_insert->bind_param("iiiiiiiis", $packing_list_id, $article_id_val, $quantity, $carrier_id, $index, $parent_pli_id, $backpack_id, $backpack_compartment_id, $name_val);
+                if(!$stmt_insert->execute()) throw new Exception("Fehler beim Einfügen von Artikel " . $article_id . ": " . $stmt_insert->error);
+                $new_db_id = $conn->insert_id;
+                $id_map[$pli_id_frontend] = $new_db_id;
+
+                if (!empty($item_data['is_new']) && !empty($item_data['include_children'])) {
+                    $stmt_children = $conn->prepare("SELECT id FROM articles WHERE parent_article_id = ?");
+                    $stmt_children->bind_param("i", $article_id);
+                    $stmt_children->execute();
+                    $result_children = $stmt_children->get_result();
+                    $child_items = $result_children->fetch_all(MYSQLI_ASSOC);
+                    $stmt_children->close();
+
+                    if (!empty($child_items)) {
+                        $temp_index = $index;
+                        // Schiebe alle nachfolgenden Elemente nach hinten
+                        $stmt_shift = $conn->prepare("UPDATE packing_list_items SET order_index = order_index + ? WHERE packing_list_id = ? AND order_index > ?");
+                        $count_children = count($child_items);
+                        $stmt_shift->bind_param("iii", $count_children, $packing_list_id, $temp_index);
+                        $stmt_shift->execute();
+                        $stmt_shift->close();
+
+                        foreach ($child_items as $child) {
+                            $temp_index++;
+                            // Child items are normal items
+                            $stmt_insert->bind_param("iiiiiiiis", $packing_list_id, $child['id'], 1, $carrier_id, $temp_index, $new_db_id, $null_val, $null_val, $null_val);
+                            $null_val = NULL; 
+                            if(!$stmt_insert->execute()) throw new Exception("Fehler beim Einfügen von Kind-Artikel " . $child['id']);
+                        }
+                    }
+                }
+            }
+            $stmt_insert->close();
+            
+            // Post-Fix: Restore names for containers from Backpack tables if they were lost because we didn't send them from frontend.
+            // Actually, better to just UPDATE them based on IDs after insertion.
+            // Update Root Names
+            $conn->query("UPDATE packing_list_items pli JOIN backpacks b ON pli.backpack_id = b.id SET pli.name = CONCAT('Rucksack: ', b.name) WHERE pli.packing_list_id = $packing_list_id AND pli.backpack_id IS NOT NULL");
+            // Update Compartment Names
+            $conn->query("UPDATE packing_list_items pli JOIN backpack_compartments bc ON pli.backpack_compartment_id = bc.id SET pli.name = bc.name WHERE pli.packing_list_id = $packing_list_id AND pli.backpack_compartment_id IS NOT NULL");
+            
+            break;
+
+        case 'delete_item':
+            $item_id = intval($data['item_id']);
+            
+            // Recursive Delete Logic using CTE if MySQL 8+ or manual recursion
+            // Manual recursion to be safe on older DBs:
+            $ids_to_delete = [$item_id];
+            $i = 0;
+            while($i < count($ids_to_delete)) {
+                $current_parent = $ids_to_delete[$i];
+                $stmt_children = $conn->prepare("SELECT id FROM packing_list_items WHERE parent_packing_list_item_id = ?");
+                $stmt_children->bind_param("i", $current_parent);
+                $stmt_children->execute();
+                $result = $stmt_children->get_result();
+                while($row = $result->fetch_assoc()) {
+                    $ids_to_delete[] = $row['id'];
+                }
+                $stmt_children->close();
+                $i++;
+            }
+            
+            // Delete all gathered IDs
+            $in_query = implode(',', array_fill(0, count($ids_to_delete), '?'));
+            $types = str_repeat('i', count($ids_to_delete));
+            $stmt_delete = $conn->prepare("DELETE FROM packing_list_items WHERE id IN ($in_query) AND packing_list_id = ?");
+            
+            // Combine ID params and list ID
+            $delete_params = array_merge($ids_to_delete, [$packing_list_id]);
+            $delete_types = $types . 'i';
+            $stmt_delete->bind_param($delete_types, ...$delete_params);
+            $stmt_delete->execute();
+            $stmt_delete->close();
+            break;
+        case 'update_quantity':
+            $item_id = intval($data['item_id']);
+            $quantity = intval($data['quantity']);
+            if ($quantity > 0) {
+                $stmt = $conn->prepare("UPDATE packing_list_items SET quantity = ? WHERE id = ?");
+                $stmt->bind_param("ii", $quantity, $item_id); $stmt->execute(); $stmt->close();
+                $conn->commit(); echo json_encode(['success' => true]); exit;
+            } else { throw new Exception('Ungültige Mengenangabe.'); }
+            break;
+        default:
+            throw new Exception('Unbekannte Aktion angefordert.', 400);
+    }
+    $conn->commit();
+    echo json_encode(get_all_items($conn, $packing_list_id));
+} catch (Exception $e) {
+    // Versuch Rollback, falls Transaktion aktiv war
+    if ($conn) {
+        try { $conn->rollback(); } catch (Throwable $t) {}
+    }
+    http_response_code(500);
+    echo json_encode(['error' => $e->getMessage()]);
+} finally {
+    if ($conn && $conn instanceof mysqli) $conn->close();
+}
+
+function user_can_edit_list($conn, $packing_list_id, $user_id) {
+    if (empty($packing_list_id) || empty($user_id)) return false;
+    $stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+    $stmt_household->bind_param("i", $user_id);
+    $stmt_household->execute();
+    $household_id = $stmt_household->get_result()->fetch_assoc()['household_id'] ?? null;
+    $stmt_household->close();
+    $stmt_list = $conn->prepare("SELECT user_id, household_id FROM packing_lists WHERE id = ?");
+    $stmt_list->bind_param("i", $packing_list_id);
+    $stmt_list->execute();
+    $list_data_result = $stmt_list->get_result();
+    $stmt_list->close();
+    if ($list_data_result->num_rows === 0) return false;
+    $list_data = $list_data_result->fetch_assoc();
+    if ($list_data['user_id'] == $user_id) return true;
+    if (!empty($list_data['household_id']) && $list_data['household_id'] == $household_id) return true;
+    return false;
+}
+
+function get_all_items($conn, $packing_list_id) {
+    $stmt = $conn->prepare("SELECT pli.id, pli.article_id, pli.quantity, pli.parent_packing_list_item_id, pli.carrier_user_id, pli.backpack_id, pli.backpack_compartment_id, COALESCE(a.name, pli.name) as name, a.weight_grams, a.product_designation, a.consumable, m.name as manufacturer_name FROM packing_list_items pli LEFT JOIN articles a ON pli.article_id = a.id LEFT JOIN manufacturers m ON a.manufacturer_id = m.id WHERE pli.packing_list_id = ? ORDER BY pli.order_index ASC, pli.id ASC");
+    $stmt->bind_param("i", $packing_list_id);
+    $stmt->execute();
+    $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt->close();
+    return $result;
+}
+?>

src/articles.php

@@ -0,0 +1,410 @@
+<?php
+// articles.php - Zeigt alle verfügbaren Artikel an
+// FINALE VERSION: Gruppiert nach Kategorien, Sticky Header, Accordion
+
+$page_title = "Artikel im Haushalt";
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+// Lade Haushalts-ID und Mitglieder-IDs
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$current_user_household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($current_user_household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $current_user_household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) {
+            $household_member_ids[] = $row['id'];
+        }
+    }
+    $stmt_members->close();
+}
+
+// Löschlogik
+if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST['delete_article_id'])) {
+    $article_to_delete_id = intval($_POST['delete_article_id']);
+    
+    $stmt_get_article = $conn->prepare("SELECT name, user_id, household_id FROM articles WHERE id = ?");
+    $stmt_get_article->bind_param("i", $article_to_delete_id);
+    $stmt_get_article->execute();
+    $article_to_delete = $stmt_get_article->get_result()->fetch_assoc();
+    $stmt_get_article->close();
+
+    $can_delete = false;
+    if ($article_to_delete) {
+        $is_owner = ($article_to_delete['user_id'] == $current_user_id);
+        $is_household_article = !empty($article_to_delete['household_id']) && $article_to_delete['household_id'] == $current_user_household_id;
+        
+        if ($is_owner || $is_household_article) {
+            $can_delete = true;
+        }
+    }
+
+    if ($can_delete) {
+        $stmt_delete = $conn->prepare("DELETE FROM articles WHERE id = ?");
+        $stmt_delete->bind_param("i", $article_to_delete_id);
+        if ($stmt_delete->execute()) {
+            if ($current_user_household_id) {
+                $log_message = htmlspecialchars($_SESSION['username']) . " hat den Artikel '" . htmlspecialchars($article_to_delete['name']) . "' gelöscht.";
+                log_household_action($conn, $current_user_household_id, $current_user_id, $log_message);
+            }
+            $message = '<div class="alert alert-success" role="alert">Artikel erfolgreich gelöscht.</div>';
+        } else {
+            $message = '<div class="alert alert-danger" role="alert">Fehler beim Löschen des Artikels: ' . $stmt_delete->error . '</div>';
+        }
+        $stmt_delete->close();
+    } else {
+        $message = '<div class="alert alert-danger" role="alert">Sie sind nicht berechtigt, diesen Artikel zu löschen.</div>';
+    }
+}
+
+$articles = [];
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+$sql = "SELECT 
+            a.id, a.name, a.weight_grams, a.quantity_owned, a.product_url, a.consumable, a.image_url, a.user_id, a.parent_article_id,
+            u.username as creator_name, a.household_id, a.product_designation, 
+            c.id AS category_id, c.name AS category_name, 
+            m.id AS manufacturer_id, m.name AS manufacturer_name,
+            l2.name AS location_level2_name, l1.name AS location_level1_name
+        FROM articles a 
+        JOIN users u ON a.user_id = u.id 
+        LEFT JOIN categories c ON a.category_id = c.id 
+        LEFT JOIN manufacturers m ON a.manufacturer_id = m.id
+        LEFT JOIN storage_locations l2 ON a.storage_location_id = l2.id
+        LEFT JOIN storage_locations l1 ON l2.parent_id = l1.id
+        WHERE a.user_id IN ($placeholders) OR a.household_id = ?
+        ORDER BY c.name ASC, a.name ASC"; // Pre-sort by category helps, but JS does the grouping
+$stmt = $conn->prepare($sql);
+if ($stmt === false) {
+    $message .= '<div class="alert alert-danger" role="alert">SQL Prepare-Fehler (Artikel laden): ' . $conn->error . '</div>';
+} else {
+    $all_params = array_merge($household_member_ids, [$current_user_household_id]);
+    $all_types = $types . 'i';
+    $stmt->bind_param($all_types, ...$all_params);
+    $stmt->execute();
+    $result = $stmt->get_result();
+    while ($row = $result->fetch_assoc()) {
+        $articles[] = $row;
+    }
+    $stmt->close();
+}
+
+$stmt_cat_load = $conn->prepare("SELECT id, name FROM categories WHERE user_id IN ($placeholders) ORDER BY name ASC");
+$stmt_cat_load->bind_param($types, ...$household_member_ids);
+$stmt_cat_load->execute();
+$categories_for_filter = $stmt_cat_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_cat_load->close();
+
+$stmt_man_load = $conn->prepare("SELECT id, name FROM manufacturers WHERE user_id IN ($placeholders) ORDER BY name ASC");
+$stmt_man_load->bind_param($types, ...$household_member_ids);
+$stmt_man_load->execute();
+$manufacturers_for_filter = $stmt_man_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_man_load->close();
+
+$conn->close();
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-boxes me-2"></i>Artikel im Haushalt</h2>
+        <a href="add_article.php" class="btn btn-sm btn-outline-light"><i class="fas fa-plus me-2"></i>Neuen Artikel hinzufügen</a>
+    </div>
+    <div class="card-body p-0"> 
+        <?php echo $message; ?>
+        
+        <div class="filter-controls p-3 border-bottom bg-light">
+            <div class="row g-2 align-items-center">
+                <div class="col-md-4"><input type="text" id="filter-text" class="form-control form-control-sm" placeholder="Suchen..."></div>
+                <div class="col-md-3"><select id="filter-category" class="form-select form-select-sm"><option value="">Alle Kategorien</option><?php foreach($categories_for_filter as $cat) echo '<option value="'.$cat['id'].'">'.htmlspecialchars($cat['name']).'</option>'; ?></select></div>
+                <div class="col-md-3"><select id="filter-manufacturer" class="form-select form-select-sm"><option value="">Alle Hersteller</option><?php foreach($manufacturers_for_filter as $man) echo '<option value="'.$man['id'].'">'.htmlspecialchars($man['name']).'</option>'; ?></select></div>
+                <div class="col-md-2 text-end">
+                    <div class="btn-group btn-group-sm" role="group">
+                        <button type="button" class="btn btn-outline-secondary" id="btn-expand-all" title="Alle ausklappen"><i class="fas fa-expand-alt"></i></button>
+                        <button type="button" class="btn btn-outline-secondary" id="btn-collapse-all" title="Alle einklappen"><i class="fas fa-compress-alt"></i></button>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="table-responsive" style="max-height: 75vh;"> 
+            <table class="table table-hover mb-0">
+                <thead>
+                    <tr>
+                        <th style="width: 60px;">Bild</th>
+                        <th style="width: 40px;"><i class="fas fa-link"></i></th>
+                        <th>Name</th>
+                        <th>Hersteller</th>
+                        <th>Modell/Typ</th>
+                        <th>Gewicht</th>
+                        <th>Anzahl</th>
+                        <th>Kategorie</th>
+                        <th>Lagerort</th>
+                        <th>Besitzer</th>
+                        <th>Status</th>
+                        <th>Aktionen</th>
+                    </tr>
+                </thead>
+                <tbody id="articlesTableBody">
+                    </tbody>
+            </table>
+        </div>
+    </div>
+</div>
+
+<div class="modal fade" id="imageModal" tabindex="-1" aria-labelledby="imageModalLabel" aria-hidden="true">
+  <div class="modal-dialog modal-lg modal-dialog-centered">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title" id="imageModalLabel">Bildansicht</h5>
+        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+      </div>
+      <div class="modal-body text-center">
+        <img src="" id="fullImage" class="modal-image" alt="Vollbildansicht">
+      </div>
+    </div>
+  </div>
+</div>
+
+<div id="image-preview-tooltip" class="image-preview-tooltip"></div>
+<script>
+document.addEventListener('DOMContentLoaded', function () {
+    const articlesData = <?php echo json_encode($articles); ?>;
+    const currentUserId = <?php echo $current_user_id; ?>;
+    const currentUserHouseholdId = <?php echo json_encode($current_user_household_id); ?>;
+    const collapseDefault = <?php echo isset($_SESSION['articles_collapse_default']) && $_SESSION['articles_collapse_default'] == '1' ? 'true' : 'false'; ?>;
+    
+    const articlesById = {};
+    // ... (Rest of data prep) ...
+    articlesData.forEach(article => {
+        articlesById[article.id] = { ...article, children: [] };
+    });
+    const articlesHierarchical = [];
+    Object.values(articlesById).forEach(article => {
+        if (article.parent_article_id && articlesById[article.parent_article_id]) {
+            articlesById[article.parent_article_id].children.push(article);
+        } else {
+            articlesHierarchical.push(article);
+        }
+    });
+
+    const tableBody = document.getElementById('articlesTableBody');
+    const filterText = document.getElementById('filter-text');
+    const filterCategory = document.getElementById('filter-category');
+    const filterManufacturer = document.getElementById('filter-manufacturer');
+
+    const collapsedCategories = new Set();
+    
+    // Initialize collapsed state based on user setting
+    if (collapseDefault) {
+        // We need to know all category names to collapse them initially
+        // We can derive them from data or just handle it dynamically in renderTable, 
+        // but for cleanest initial state, let's populate the Set.
+        const uniqueCategories = new Set(articlesData.map(a => a.category_name || 'Ohne Kategorie'));
+        uniqueCategories.forEach(c => collapsedCategories.add(c));
+    }
+
+    function renderTable() {
+        const textValue = filterText.value.toLowerCase();
+        const categoryValue = filterCategory.value;
+        const manufacturerValue = filterManufacturer.value;
+        const isSearching = textValue.length > 0 || categoryValue || manufacturerValue;
+
+        function articleMatchesFilter(article) {
+            const matchesText = article.name.toLowerCase().includes(textValue) ||
+                                (article.manufacturer_name && article.manufacturer_name.toLowerCase().includes(textValue)) ||
+                                (article.product_designation && article.product_designation.toLowerCase().includes(textValue));
+            const matchesCategory = !categoryValue || article.category_id == categoryValue;
+            const matchesManufacturer = !manufacturerValue || article.manufacturer_id == manufacturerValue;
+            return matchesText && matchesCategory && matchesManufacturer;
+        }
+
+        const filteredList = articlesHierarchical.filter(article => {
+            if (articleMatchesFilter(article)) return true;
+            if (article.children.length > 0) return article.children.some(child => articleMatchesFilter(child));
+            return false;
+        });
+
+        const groupedArticles = {};
+        filteredList.forEach(article => {
+            const catName = article.category_name || 'Ohne Kategorie';
+            if (!groupedArticles[catName]) groupedArticles[catName] = [];
+            groupedArticles[catName].push(article);
+        });
+
+        const sortedCategories = Object.keys(groupedArticles).sort((a, b) => {
+            if (a === 'Ohne Kategorie') return 1;
+            if (b === 'Ohne Kategorie') return -1;
+            return a.localeCompare(b);
+        });
+
+        let tableHTML = '';
+
+        if (sortedCategories.length === 0) {
+            tableHTML = '<tr><td colspan="12" class="text-center text-muted p-4">Keine Artikel gefunden.</td></tr>';
+        } else {
+            sortedCategories.forEach(catName => {
+                const items = groupedArticles[catName];
+                // If searching, expand all. If not, respect collapsed state.
+                const isCollapsed = collapsedCategories.has(catName) && !isSearching;
+                const count = items.reduce((acc, item) => acc + 1 + item.children.length, 0);
+                
+                tableHTML += `<tr class="category-header ${isCollapsed ? 'collapsed' : ''}" data-category="${catName}">
+                    <td colspan="12">
+                        <i class="fas fa-chevron-down me-2"></i> ${catName} 
+                        <span class="badge bg-light text-dark rounded-pill ms-2">${count}</span>
+                    </td>
+                </tr>`;
+
+                if (!isCollapsed) {
+                    items.forEach(article => {
+                        tableHTML += generateRowHTML(article);
+                    });
+                }
+            });
+        }
+        
+        tableBody.innerHTML = tableHTML;
+        initializeInteractivity();
+    }
+
+    function generateRowHTML(article, level = 0) {
+        let html = '';
+        const imagePath = article.image_url ? article.image_url : 'keinbild.png';
+        const productLink = article.product_url ? `<a href="${article.product_url}" target="_blank" class="btn btn-sm btn-outline-secondary" data-bs-toggle="tooltip" title="Produktseite öffnen"><i class="fas fa-external-link-alt"></i></a>` : '';
+        const creatorBadge = article.user_id != currentUserId ? `<span class="badge bg-info">${article.creator_name}</span>` : `<span class="badge bg-primary">Ich</span>`;
+        const householdBadge = article.household_id ? `<span class="badge bg-success" data-bs-toggle="tooltip" title="Für den Haushalt freigegeben"><i class="fas fa-users"></i></span>` : `<span class="badge bg-secondary" data-bs-toggle="tooltip" title="Privater Artikel"><i class="fas fa-user"></i></span>`;
+        const consumableIcon = article.consumable == 1 ? ` <i class="fas fa-cookie-bite text-warning" data-bs-toggle="tooltip" title="Verbrauchsartikel"></i>` : '';
+        const quantityBadge = article.consumable == 1 ? `<span class="badge bg-secondary rounded-pill" data-bs-toggle="tooltip" title="Verbrauchsartikel">&infin;</span>` : `<span class="badge bg-secondary rounded-pill">${article.quantity_owned}</span>`;
+
+        let actionButtons = '';
+        const isOwner = (article.user_id == currentUserId);
+        const isHouseholdArticle = (article.household_id && article.household_id == currentUserHouseholdId);
+        
+        if (isOwner || isHouseholdArticle) {
+            actionButtons = `<div class="btn-group">
+                <a href="edit_article.php?id=${article.id}" class="btn btn-sm btn-outline-primary" data-bs-toggle="tooltip" title="Bearbeiten"><i class="fas fa-edit"></i></a>`;
+            actionButtons += `<form action="articles.php" method="post" class="d-inline" onsubmit="return confirm('Sind Sie sicher?');"><input type="hidden" name="delete_article_id" value="${article.id}"><button type="submit" class="btn btn-sm btn-outline-danger" data-bs-toggle="tooltip" title="Löschen"><i class="fas fa-trash"></i></button></form>`;
+            actionButtons += `</div>`;
+        }
+        
+        const indentStyle = level > 0 ? `padding-left: ${1.5 * level}rem;` : '';
+        const treePrefix = level > 0 ? `<span class="tree-line" style="left: ${0.5 * level}rem;"></span>` : '';
+        const nameCellContent = `<div class="tree-view-item level-${level}" style="position:relative;">${treePrefix}<span class="item-name-text">${article.name}</span></div>`;
+
+        html += `<tr>
+            <td><img src="${imagePath}" alt="${article.name}" style="width: 40px; height: 40px; object-fit: cover; border-radius: 5px;" class="article-image-trigger" data-preview-url="${imagePath}"></td>
+            <td class="text-center">${productLink}</td>
+            <td>${nameCellContent}</td>
+            <td>${article.manufacturer_name || '---'}</td>
+            <td>${article.product_designation || '---'}</td>
+            <td>${new Intl.NumberFormat('de-DE').format(article.weight_grams)} g</td>
+            <td>${quantityBadge}</td>
+            <td>${article.category_name || '---'}</td>
+            <td>${article.location_level1_name ? `<small>${article.location_level1_name} <i class="fas fa-chevron-right fa-xs"></i> ${article.location_level2_name}</small>` : '---'}</td>
+            <td>${creatorBadge}</td>
+            <td>${householdBadge}${consumableIcon}</td>
+            <td>${actionButtons}</td>
+        </tr>`;
+        
+        if (article.children.length > 0) {
+            article.children.forEach(child => {
+                html += generateRowHTML(child, level + 1);
+            });
+        }
+        return html;
+    }
+
+    const tooltip = document.getElementById('image-preview-tooltip');
+    const imageModal = new bootstrap.Modal(document.getElementById('imageModal'));
+    const fullImageElement = document.getElementById('fullImage');
+    const imageModalLabel = document.getElementById('imageModalLabel');
+
+    function initializeInteractivity() {
+        const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
+        tooltipTriggerList.map(function (tooltipTriggerEl) {
+            return new bootstrap.Tooltip(tooltipTriggerEl);
+        });
+
+        if (tooltip) {
+            document.querySelectorAll('.article-image-trigger').forEach(trigger => {
+                trigger.addEventListener('mouseover', function (e) {
+                    const previewUrl = this.getAttribute('data-preview-url');
+                    if(previewUrl && !previewUrl.endsWith('keinbild.png')) {
+                        tooltip.style.backgroundImage = `url('${previewUrl}')`;
+                        tooltip.style.display = 'block';
+                    }
+                });
+                trigger.addEventListener('mousemove', function (e) {
+                    tooltip.style.left = e.pageX + 15 + 'px';
+                    tooltip.style.top = e.pageY + 15 + 'px';
+                });
+                trigger.addEventListener('mouseout', function (e) {
+                    tooltip.style.display = 'none';
+                });
+
+                trigger.addEventListener('click', function(e) {
+                    const fullImageUrl = this.getAttribute('data-preview-url');
+                    const articleName = this.getAttribute('alt');
+                    if(fullImageUrl && !fullImageUrl.endsWith('keinbild.png')) {
+                        fullImageElement.src = fullImageUrl;
+                        imageModalLabel.textContent = articleName;
+                        imageModal.show();
+                    }
+                });
+            });
+        }
+
+        document.querySelectorAll('.category-header').forEach(header => {
+            header.addEventListener('click', function() {
+                const catName = this.getAttribute('data-category');
+                if (collapsedCategories.has(catName)) {
+                    collapsedCategories.delete(catName);
+                } else {
+                    collapsedCategories.add(catName);
+                }
+                renderTable();
+            });
+        });
+    }
+
+    filterText.addEventListener('input', renderTable);
+    filterCategory.addEventListener('change', renderTable);
+    filterManufacturer.addEventListener('change', renderTable);
+
+    document.getElementById('btn-expand-all').addEventListener('click', function() {
+        collapsedCategories.clear();
+        renderTable();
+    });
+
+    document.getElementById('btn-collapse-all').addEventListener('click', function() {
+        // Find all currently rendered categories
+        const visibleCategories = Array.from(document.querySelectorAll('.category-header')).map(el => el.getAttribute('data-category'));
+        visibleCategories.forEach(c => collapsedCategories.add(c));
+        renderTable();
+    });
+
+    renderTable();
+});
+</script>
+
+<?php require_once 'footer.php'; ?>

src/assets/css/style.css

@@ -0,0 +1,957 @@
+:root {
+    /* Color Palette - Forest Theme */
+    --color-primary: #2e7d32; /* Richer Green */
+    --color-primary-light: #558b2f; /* Light Olive Green */
+    --color-primary-dark: #1b5e20;
+    --color-secondary: #546e7a;
+    --color-accent: #7cb342; /* Natural Light Green */
+    --color-background: #f0f2f5;
+    
+    --sidebar-bg: rgba(20, 40, 20, 0.85);
+
+    /* Glassmorphism Variables - Enhanced */
+    --glass-bg: rgba(255, 255, 255, 0.5); /* More transparent */
+    --glass-border: 1px solid rgba(255, 255, 255, 0.4);
+    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
+    --glass-blur: blur(12px); /* Stronger blur */
+    
+    /* Text Colors */
+    --text-main: #1a1a1a;
+    --text-muted: #555;
+    --text-light: #ffffff;
+
+    /* Spacing & Radius */
+    --border-radius-lg: 20px; /* Rounder */
+    --border-radius-md: 15px;
+    --border-radius-sm: 10px;
+}
+
+/* Robust Reset */
+*, *::before, *::after {
+    box-sizing: border-box;
+}
+
+body {
+    font-family: 'Nunito Sans', sans-serif;
+    color: var(--text-main);
+    background-color: var(--color-background);
+    margin: 0;
+    padding: 0;
+    height: 100vh; 
+    width: 100vw;
+    overflow-x: hidden;
+    overflow-y: auto;
+}
+
+h1, h2, h3, h4, h5, h6, .navbar-brand {
+    font-family: 'Poppins', sans-serif; /* Modern Headings */
+    font-weight: 600;
+    letter-spacing: -0.5px;
+    color: #1b5e20; /* Ensure Dark Green for headings */
+}
+
+/* Wallpaper Background with Overlay */
+body::before {
+    content: "";
+    position: fixed;
+    top: 0; left: 0;
+    width: 100%; height: 100%;
+    background-image: linear-gradient(to bottom right, rgba(46, 125, 50, 0.1), rgba(0, 0, 0, 0.2)), url('../../wallpaper.jpg'); /* Gradient Overlay */
+    background-size: cover;
+    background-position: center center;
+    background-attachment: fixed;
+    z-index: -1;
+}
+
+/* Layout: Sidebar & Main Content */
+.page-wrapper {
+    display: flex;
+    width: 100%;
+    min-height: 100vh;
+}
+
+/* Sidebar Styling - Modern Dark Glass */
+.sidebar {
+    width: 240px; /* Reduced from 280px */
+    flex-shrink: 0;
+    background: rgba(20, 40, 20, 0.85); /* Dark semi-transparent */
+    backdrop-filter: blur(15px);
+    border-right: 1px solid rgba(255,255,255,0.1);
+    color: var(--text-light);
+    padding: 15px; /* Reduced from 25px */
+    display: flex;
+    flex-direction: column;
+    gap: 1rem; /* Reduced from 2rem */
+    box-shadow: 10px 0 30px rgba(0,0,0,0.1);
+    z-index: 100;
+    min-height: 100vh;
+}
+
+.sidebar .navbar-brand {
+    color: var(--text-light);
+    margin-bottom: 5px;
+    text-align: center;
+    text-decoration: none;
+    display: block;
+    text-transform: uppercase;
+    font-size: 1rem; /* Reduced */
+}
+
+.sidebar .navbar-brand-logo {
+    width: 75px; /* Increased to 75px */
+    height: 75px;
+    margin-bottom: 10px;
+    border-radius: 20px; /* Squircle */
+    object-fit: cover;
+    border: 2px solid rgba(255,255,255,0.5);
+    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
+    transition: transform 0.3s ease;
+}
+
+.sidebar .navbar-brand:hover .navbar-brand-logo {
+    transform: rotate(-3deg) scale(1.05);
+}
+
+.sidebar .nav-link {
+    color: rgba(255, 255, 255, 0.7);
+    padding: 10px 15px; /* Reduced from 14px 20px */
+    border-radius: var(--border-radius-md);
+    transition: all 0.3s ease;
+    margin-bottom: 5px; /* Reduced */
+    display: flex;
+    align-items: center;
+    text-decoration: none;
+    font-weight: 500;
+    font-family: 'Poppins', sans-serif;
+    font-size: 0.9rem; /* Compact font */
+}
+
+.sidebar .nav-link:hover {
+    background-color: rgba(255, 255, 255, 0.15);
+    color: var(--text-light);
+    transform: translateX(5px);
+}
+
+.sidebar .nav-link.active {
+    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
+    color: var(--text-light);
+    font-weight: 600;
+    box-shadow: 0 4px 15px rgba(85, 139, 47, 0.4);
+}
+
+.sidebar .nav-link i.fa-fw {
+    margin-right: 15px; /* Reduced */
+    width: 20px;
+    text-align: center;
+}
+
+.sidebar .username-display {
+    margin-top: auto;
+    padding-top: 20px;
+    border-top: 1px solid rgba(255,255,255,0.1);
+    text-align: center;
+    font-size: 0.85rem;
+    color: rgba(255, 255, 255, 0.7);
+}
+
+.card {
+    background: var(--glass-bg);
+    backdrop-filter: var(--glass-blur);
+    -webkit-backdrop-filter: var(--glass-blur);
+    border: var(--glass-border);
+    border-radius: var(--border-radius-lg);
+    box-shadow: var(--glass-shadow);
+    margin-bottom: 1.5rem; /* Reduced */
+    overflow: hidden;
+    transition: transform 0.2s ease;
+}
+
+/* Subtle hover lift for interactive cards */
+.card.packing-list-card:hover {
+    transform: translateY(-5px);
+}
+
+.card-header {
+    background-color: rgba(255, 255, 255, 0.5);
+    color: #1b5e20; /* Explicit Dark Green (var(--color-primary-dark)) */
+    border-bottom: 1px solid rgba(0,0,0,0.05);
+    padding: 0.5rem 1rem; /* Further reduced padding */
+    font-weight: 700; /* Bolder */
+    font-family: 'Poppins', sans-serif;
+    font-size: 0.95rem; /* Slightly smaller font */
+}
+
+/* Fix for buttons inside card header being invisible if they are outline-light */
+.card-header .btn-outline-light {
+    color: var(--color-primary);
+    border-color: var(--color-primary);
+}
+.card-header .btn-outline-light:hover {
+    background-color: var(--color-primary);
+    color: white;
+}
+
+.card-body {
+    padding: 1rem; /* Reduced padding */
+}
+
+/* Buttons */
+.btn-primary {
+    background-color: var(--color-primary-light);
+    border-color: var(--color-primary-light);
+    border-radius: var(--border-radius-sm);
+    padding: 0.375rem 1rem; /* Reduced */
+    font-size: 0.9rem;
+    font-weight: 600;
+    transition: all 0.2s;
+}
+
+.btn-primary:hover {
+    background-color: var(--color-primary);
+    border-color: var(--color-primary);
+    transform: translateY(-1px);
+    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
+}
+
+/* Global Compact Inputs */
+.form-control, .form-select {
+    padding: 0.375rem 0.75rem;
+    font-size: 0.9rem;
+}
+
+.btn-outline-primary {
+    color: var(--color-primary-light);
+    border-color: var(--color-primary-light);
+}
+
+.btn-outline-primary:hover {
+    background-color: var(--color-primary-light);
+    border-color: var(--color-primary-light);
+    color: #fff;
+}
+
+/* Text Colors Override */
+.text-primary {
+    color: var(--color-primary) !important;
+}
+
+.btn-outline-light {
+    border-color: rgba(255,255,255,0.5);
+    color: rgba(255,255,255,0.8);
+}
+.btn-outline-light:hover {
+    background-color: rgba(255,255,255,0.2);
+    color: #fff;
+    border-color: #fff;
+}
+
+/* Form Switch / Checkbox Override */
+.form-check-input:checked {
+    background-color: var(--color-primary-light);
+    border-color: var(--color-primary-light);
+}
+.form-check-input:focus {
+    border-color: var(--color-primary-light);
+    box-shadow: 0 0 0 0.25rem rgba(85, 139, 47, 0.25);
+}
+
+/* Login & Register specific styles */
+.auth-wrapper {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    min-height: 100vh;
+    padding: 20px;
+}
+
+.auth-container {
+    max-width: 420px;
+    width: 100%;
+    border-radius: var(--border-radius-lg);
+    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
+    background-color: rgba(255, 255, 255, 0.95);
+    overflow: hidden;
+    backdrop-filter: blur(10px);
+}
+
+.auth-header {
+    background-color: var(--color-primary);
+    color: white;
+    padding: 30px;
+    text-align: center;
+}
+
+.auth-logo {
+    width: 100px;
+    height: 100px;
+    border-radius: 50%;
+    border: 4px solid rgba(255,255,255,0.3);
+    margin-bottom: 15px;
+    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
+}
+
+.auth-body {
+    padding: 40px 30px;
+}
+
+/* Charts & Dashboard */
+.chart-container {
+    position: relative;
+    height: 220px; /* Reduced from 300px */
+    width: 100%;
+}
+
+/* Welcome Section (Dashboard) */
+.welcome-section {
+    text-align: center;
+    padding: 20px 0; /* Reduced from 40px */
+}
+
+.welcome-section h1 {
+    font-size: 2rem; /* Reduced from 2.5rem */
+    margin-bottom: 10px;
+    font-weight: 700;
+    color: var(--color-primary);
+}
+
+.welcome-section p.lead {
+    font-size: 1rem; /* Reduced from 1.2rem */
+    color: var(--text-muted);
+    margin-bottom: 1rem;
+}
+
+.welcome-image-container {
+    max-width: 800px;
+    height: 180px; /* Drastically reduced from 350px */
+    margin: 20px auto; /* Reduced margins */
+    border-radius: var(--border-radius-lg);
+    overflow: hidden;
+    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
+}
+
+.animated-bg {
+    width: 100%;
+    height: 100%;
+    background-image: url('../../wallpaper.jpg');
+    background-size: cover;
+    background-position: center center;
+    animation: ken-burns 25s infinite alternate ease-in-out;
+}
+
+@keyframes ken-burns {
+    0% { transform: scale(1) translate(0, 0); }
+    100% { transform: scale(1.15) translate(-2%, 2%); }
+}
+
+/* Packing List Cards */
+.packing-list-card {
+    transition: transform 0.3s ease, box-shadow 0.3s ease;
+    background-color: rgba(255, 255, 255, 0.6); /* Slightly more opaque than standard card */
+    border-left: 5px solid var(--color-primary-light); /* Accent border */
+}
+
+.packing-list-card:hover {
+    transform: translateY(-5px);
+    box-shadow: 0 12px 40px rgba(0,0,0,0.15) !important;
+}
+
+.packing-list-card .card-body {
+    position: relative;
+}
+
+.packing-list-card .card-icon {
+    position: absolute;
+    top: 1rem;
+    right: 1rem;
+    width: 60px;
+    height: 60px;
+    pointer-events: none;
+    opacity: 0.15;
+    filter: grayscale(100%);
+    transition: all 0.3s ease;
+}
+
+.packing-list-card:hover .card-icon {
+    opacity: 0.4;
+    transform: rotate(10deg) scale(1.1);
+    filter: grayscale(0%);
+}
+
+.packing-list-card .card-title {
+    font-weight: 700;
+    color: var(--color-primary-dark);
+    margin-bottom: 0.5rem;
+}
+
+.packing-list-card .card-footer {
+    background-color: rgba(255, 255, 255, 0.5);
+    border-top: 1px solid rgba(0,0,0,0.05);
+    padding: 1rem 1.5rem;
+}
+
+.creator-badge {
+    font-size: 0.75em;
+    font-weight: 600;
+    opacity: 0.9;
+}
+
+/* Footer */
+.main-footer {
+    background-color: transparent; /* Transparent to blend with glassmorphism or simple text */
+    color: var(--text-muted);
+    text-align: center;
+    padding: 1.5rem;
+    font-size: 0.85rem;
+    margin-top: auto; /* Push to bottom if in flex container */
+    border-top: 1px solid rgba(0,0,0,0.05);
+}
+
+/* Ensure main content pushes footer down */
+.main-content {
+    flex-grow: 1;
+    padding: 30px 50px; /* Increased spacing as requested */
+    display: flex;
+    flex-direction: column;
+}
+
+/* --- Styles from articles.php --- */
+.image-preview-tooltip {
+    display: none;
+    position: absolute;
+    border: 1px solid rgba(0,0,0,0.1);
+    background-color: #fff;
+    padding: 5px;
+    z-index: 1056;
+    width: 150px;
+    height: 150px;
+    background-repeat: no-repeat;
+    background-position: center center;
+    background-size: contain;
+    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
+    border-radius: var(--border-radius-sm);
+    pointer-events: none;
+}
+
+.table tbody td {
+    vertical-align: middle !important;
+}
+
+/* Force compact images in tables */
+.table img, .article-image-trigger {
+    width: 30px !important;
+    height: 30px !important;
+}
+
+.article-image-trigger {
+    cursor: pointer;
+    transition: transform 0.2s;
+}
+.article-image-trigger:hover {
+    transform: scale(1.1);
+}
+
+.modal-image {
+    max-width: 100%;
+    max-height: 80vh;
+    border-radius: var(--border-radius-sm);
+}
+
+/* --- Styles from add_article.php --- */
+.section-card {
+    border: 1px solid rgba(0,0,0,0.08);
+    border-radius: var(--border-radius-md);
+    overflow: hidden; /* Ensure header radius respects container */
+    background-color: var(--glass-bg);
+    backdrop-filter: var(--glass-blur);
+}
+
+.section-card .card-header {
+    background-color: rgba(59, 74, 35, 0.08); /* Very light primary */
+    color: var(--color-primary-dark);
+    border-bottom: 1px solid rgba(0,0,0,0.05);
+    font-weight: 700;
+}
+
+.section-card .card-body {
+    background-color: transparent;
+}
+
+.paste-area {
+    border: 2px dashed var(--color-secondary);
+    border-radius: var(--border-radius-sm);
+    padding: 2rem 1rem;
+    text-align: center;
+    color: var(--text-muted);
+    background-color: rgba(250, 250, 250, 0.5);
+    transition: all 0.2s;
+    cursor: pointer;
+}
+
+.paste-area.hover, .paste-area:hover {
+    background-color: rgba(59, 74, 35, 0.1);
+    border-color: var(--color-primary-light);
+    color: var(--color-primary);
+}
+
+#imagePreview {
+    max-width: 100%;
+    max-height: 250px;
+    border-radius: var(--border-radius-sm);
+    object-fit: contain;
+    border: 1px solid rgba(0,0,0,0.1);
+    padding: 5px;
+    background-color: rgba(255, 255, 255, 0.8);
+}
+
+/* --- Packing List Editor Styles --- */
+.editor-container {
+    display: grid;
+    grid-template-columns: 40% 1fr;
+    gap: 1.5rem;
+}
+
+.editor-pane {
+    display: flex;
+    flex-direction: column;
+    height: 75vh;
+    background-color: var(--glass-bg);
+    backdrop-filter: var(--glass-blur);
+    border: 1px solid rgba(0,0,0,0.1);
+    border-radius: var(--border-radius-md);
+    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
+}
+
+.pane-header {
+    padding: 1rem;
+    flex-shrink: 0;
+    border-bottom: 1px solid rgba(0,0,0,0.05);
+    background-color: rgba(248, 249, 250, 0.5);
+}
+
+.pane-content {
+    overflow-y: auto;
+    flex-grow: 1;
+    padding: 1rem;
+}
+
+.available-item-card {
+    padding: 8px 12px;
+    margin-bottom: 6px;
+    background: rgba(248, 249, 250, 0.7);
+    border-radius: var(--border-radius-sm);
+    cursor: grab;
+    border: 1px solid rgba(0,0,0,0.05);
+    transition: background-color 0.2s;
+}
+
+.available-item-card:hover {
+    background-color: #e9ecef;
+}
+
+.carrier-box {
+    margin-bottom: 1.5rem;
+    border: 1px solid rgba(0,0,0,0.1);
+    border-radius: var(--border-radius-sm);
+    overflow: hidden;
+}
+
+.carrier-header {
+    padding: 0.75rem 1.25rem;
+    background-color: rgba(233, 236, 239, 0.5);
+    border-bottom: 1px solid rgba(0,0,0,0.05);
+    font-weight: 600;
+}
+
+.carrier-list {
+    min-height: 80px;
+    padding: 10px;
+    background-color: rgba(255, 255, 255, 0.3);
+}
+
+.packed-item-row {
+    display: flex;
+    align-items: center;
+    padding: 8px;
+    margin-bottom: 4px;
+    border-bottom: 1px solid rgba(0,0,0,0.03);
+    background-color: rgba(255, 255, 255, 0.6);
+    border-radius: var(--border-radius-sm);
+    transition: background-color 0.2s;
+}
+
+.packed-item-row:hover {
+    background-color: rgba(255, 255, 255, 0.8);
+}
+
+.packed-item-row.ghost-class {
+    background-color: rgba(59, 74, 35, 0.1);
+    border: 1px dashed var(--color-primary);
+    opacity: 0.7;
+}
+
+.handle {
+    cursor: grab;
+    color: var(--color-secondary);
+    margin: 0 10px 0 5px;
+}
+
+.item-name {
+    flex-grow: 1;
+    font-size: 0.95rem;
+}
+
+.item-controls {
+    display: flex;
+    align-items: center;
+    gap: 5px;
+}
+
+.quantity-input {
+    width: 70px;
+    text-align: center;
+}
+
+.nesting-level-1 {
+    margin-left: 30px !important;
+    border-left: 3px solid rgba(0,0,0,0.1);
+}
+
+.nesting-level-2 {
+    margin-left: 60px !important;
+    border-left: 3px solid rgba(0,0,0,0.1);
+}
+
+/* --- Storage Locations Styles --- */
+.level-1-card {
+    border: 1px solid rgba(0,0,0,0.1);
+    border-radius: var(--border-radius-md);
+    overflow: hidden;
+    background-color: var(--glass-bg);
+    backdrop-filter: var(--glass-blur);
+}
+
+.level-1-card .card-header {
+    background-color: rgba(59, 74, 35, 0.1);
+    color: var(--color-primary-dark);
+    border-bottom: 1px solid rgba(0,0,0,0.05);
+    font-weight: 700;
+}
+
+.level-1-card .card-body {
+    background-color: transparent;
+}
+
+.level-2-list .list-group-item {
+    background-color: rgba(255, 255, 255, 0.5);
+    border-left: 4px solid var(--color-primary-light);
+    margin-bottom: 2px;
+    border-radius: var(--border-radius-sm);
+}
+
+/* --- Tree View for Packing List Details --- */
+.tree-view-item {
+    position: relative;
+    display: flex;
+    align-items: center;
+    height: 100%;
+}
+
+.tree-view-item.level-0 {
+    font-weight: 600;
+    color: var(--color-primary-dark);
+}
+
+/* Indentation Levels */
+.tree-view-item.level-1 { padding-left: 1.5rem; }
+.tree-view-item.level-2 { padding-left: 3rem; }
+.tree-view-item.level-3 { padding-left: 4.5rem; }
+
+/* The "L" shaped connector line for children */
+.tree-view-item:not(.level-0) .tree-line {
+    position: absolute;
+    left: 0; 
+    /* Logic for L-shape relative to the current cell */
+    /* Since we can't connect to the row above easily in a simple table, 
+       we draw a small 'L' that implies structure */
+    width: 15px;
+    height: 25px; /* Roughly half row height */
+    border-left: 2px solid rgba(0,0,0,0.15);
+    border-bottom: 2px solid rgba(0,0,0,0.15);
+    border-bottom-left-radius: 5px; /* Smooth curve */
+    top: -12px; /* Move up to simulate connection to parent roughly */
+    display: block;
+}
+
+/* Adjust L-shape position based on level if needed, 
+   but padding-left on parent handles the text offset. 
+   We need the line to be at the correct X offset. */
+.tree-view-item.level-1 .tree-line { left: 0.5rem; }
+.tree-view-item.level-2 .tree-line { left: 2rem; }
+.tree-view-item.level-3 .tree-line { left: 3.5rem; }
+
+.item-name-text {
+    margin-left: 8px;
+    /* Ensure text doesn't overlap line */
+}
+
+/* Muted weight for cleaner look */
+.table td .text-muted.small {
+    font-size: 0.85em;
+    color: #888 !important;
+}
+
+/* Better badges in table */
+.badge.rounded-pill {
+    font-weight: 500;
+    letter-spacing: 0.5px;
+}
+
+/* --- Packing List Detail View Styles --- */
+.item-image {
+    width: 40px;
+    height: 40px;
+    object-fit: cover;
+    border-radius: var(--border-radius-sm);
+    cursor: pointer;
+    border: 1px solid rgba(0,0,0,0.1);
+}
+
+.card-header-stats {
+    background-color: var(--color-primary-light) !important;
+    color: var(--text-light) !important;
+}
+
+.chart-container {
+    position: relative;
+    min-height: 220px;
+    width: 100%;
+    margin-bottom: 1rem;
+}
+
+.carrier-header-row td {
+    background-color: rgba(0,0,0,0.03);
+    font-weight: 600;
+    padding: 1rem 1.5rem;
+    border-top: 1px solid rgba(0,0,0,0.05);
+    color: var(--color-primary-dark);
+    font-family: 'Poppins', sans-serif;
+}
+
+/* Remove border for the very first header to avoid gap at the top of the card */
+.table tbody tr:first-child.carrier-header-row td {
+    border-top: none;
+}
+
+.stats-table-container {
+    border: 1px solid rgba(0,0,0,0.05);
+    border-radius: var(--border-radius-sm);
+    background-color: rgba(255,255,255,0.5);
+    overflow: hidden;
+    padding: 0.75rem;
+}
+
+.save-feedback {
+    position: fixed;
+    bottom: 20px;
+    left: 50%;
+    transform: translateX(-50%);
+    background-color: var(--color-primary-dark);
+    color: #fff;
+    padding: 10px 20px;
+    border-radius: 30px;
+    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
+    z-index: 9999;
+    opacity: 0;
+    transition: opacity 0.3s ease-in-out;
+    pointer-events: none;
+    font-weight: 600;
+    font-size: 0.9rem;
+}
+/* --- Articles Table Styles --- */
+/* Sticky Header */
+.table-responsive thead th {
+    position: sticky;
+    top: 0;
+    background-color: var(--sidebar-bg); /* Match sidebar */
+    color: var(--text-light);
+    backdrop-filter: blur(15px);
+    z-index: 10; /* Above content */
+    box-shadow: 0 2px 2px -1px rgba(0,0,0,0.1);
+}
+
+/* Reverted Table Styling (Light) */
+.table {
+    color: var(--text-main);
+    margin-bottom: 0;
+}
+
+.table th, .table td {
+    border-color: rgba(0, 0, 0, 0.05);
+    padding: 0.5rem 0.75rem; /* Compact padding */
+    vertical-align: middle;
+}
+
+/* Hover state */
+.table-hover tbody tr:hover {
+    background-color: rgba(0, 0, 0, 0.02);
+}
+
+/* Category Header Row */
+.category-header {
+    background-color: rgba(46, 125, 50, 0.15); /* Light subtle green */
+    color: var(--color-primary-dark); /* Dark text for contrast */
+    cursor: pointer;
+    font-weight: 600;
+    font-family: 'Poppins', sans-serif;
+}
+.category-header:hover {
+    background-color: rgba(46, 125, 50, 0.25);
+}
+.category-header i {
+    transition: transform 0.2s;
+}
+.category-header.collapsed i {
+    transform: rotate(-90deg);
+}
+.category-header td {
+    background-color: rgba(46, 125, 50, 0.15) !important;
+    color: var(--color-primary-dark);
+    border-bottom: 1px solid rgba(0,0,0,0.1);
+}
+
+/* --- Print Styles --- */
+.print-view { display: none; }
+
+@media print {
+    @page { size: A4; margin: 1.5cm; }
+    
+    html, body {
+        width: 210mm;
+        height: auto;
+        font-size: 10pt;
+        background: #fff;
+        color: #000;
+        -webkit-print-color-adjust: exact !important; /* Chrome, Safari */
+        print-color-adjust: exact !important; /* Firefox */
+    }
+
+    .screen-view, .print-hide, .sidebar, .main-footer, .navbar, .btn {
+        display: none !important;
+    }
+
+    .print-view {
+        display: block !important;
+    }
+
+    .print-header {
+        text-align: center;
+        margin-bottom: 10mm;
+        border-bottom: 2px solid #000;
+        padding-bottom: 5mm;
+    }
+
+    .print-header h1 {
+        font-size: 20pt;
+        margin: 0 0 2mm 0;
+        color: #000;
+    }
+
+    .print-header p {
+        font-size: 11pt;
+        color: #444;
+        margin: 0;
+    }
+
+    .print-carrier-group {
+        page-break-inside: avoid;
+        margin-top: 8mm;
+    }
+
+    .print-carrier-header {
+        font-size: 13pt;
+        background-color: #eee;
+        padding: 2mm 4mm;
+        margin-bottom: 0;
+        border-bottom: 1px solid #ccc;
+        font-weight: bold;
+    }
+
+    .print-table {
+        width: 100%;
+        border-collapse: collapse;
+        margin-bottom: 5mm;
+    }
+
+    .print-table th {
+        text-align: left;
+        padding: 2mm;
+        border-bottom: 1px solid #000;
+        font-weight: bold;
+        font-size: 9pt;
+        text-transform: uppercase;
+    }
+
+    .print-table td {
+        padding: 2mm;
+        border-bottom: 1px solid #ddd;
+        vertical-align: top;
+    }
+
+    .print-table tr.print-child-item td {
+        color: #333;
+    }
+
+    .print-checkbox-cell {
+        width: 20px;
+        text-align: center;
+    }
+
+    .print-checkbox {
+        display: inline-block;
+        width: 4mm;
+        height: 4mm;
+        border: 1px solid #000;
+        border-radius: 1px;
+    }
+
+    /* Arrow for print view hierarchy */
+    .arrow-wrapper {
+        display: inline-block;
+        width: 4mm;
+        margin-right: 2mm;
+        border-bottom: 1px solid #999;
+        border-left: 1px solid #999;
+        height: 3mm;
+        vertical-align: middle;
+        transform: translateY(-1mm);
+    }
+
+    .statistics-section {
+        page-break-before: auto;
+        margin-top: 15mm;
+        border-top: 2px solid #000;
+        padding-top: 5mm;
+    }
+
+    .statistics-list {
+        list-style: none;
+        padding: 0;
+        display: grid;
+        grid-template-columns: 1fr 1fr;
+        gap: 4mm;
+    }
+
+    .statistics-list li {
+        border-bottom: 1px solid #eee;
+        padding-bottom: 1mm;
+    }
+    
+    .statistics-list li strong {
+        display: block;
+        font-size: 9pt;
+    }
+    
+    .statistics-list li span {
+        font-size: 11pt;
+    }
+}

src/backpack_utils.php

@@ -0,0 +1,73 @@
+<?php
+// backpack_utils.php - Shared functions for backpack management
+
+function sync_backpack_items($conn, $list_id, $user_id, $backpack_id) {
+    // 1. Get Backpack Info
+    $bp = $conn->query("SELECT name FROM backpacks WHERE id = $backpack_id")->fetch_assoc();
+    
+    // 2. Check/Create Root Item
+    // Use NULL safe comparison or check for NULL explicitly
+    // We need to allow for existing items that might be named differently if user renamed them? 
+    // No, we stick to structure.
+    $root_id = 0;
+    $stmt = $conn->prepare("SELECT id FROM packing_list_items WHERE packing_list_id = ? AND carrier_user_id = ? AND backpack_id = ?");
+    $stmt->bind_param("iii", $list_id, $user_id, $backpack_id);
+    $stmt->execute();
+    $res = $stmt->get_result();
+    
+    if ($row = $res->fetch_assoc()) {
+        $root_id = $row['id'];
+    } else {
+        // Create Root
+        $name = "Rucksack: " . $bp['name'];
+        // Use correct column count and NULLs
+        $stmt_ins = $conn->prepare("INSERT INTO packing_list_items (packing_list_id, carrier_user_id, name, backpack_id, quantity, article_id, order_index, parent_packing_list_item_id) VALUES (?, ?, ?, ?, 1, NULL, 0, NULL)");
+        $stmt_ins->bind_param("iisi", $list_id, $user_id, $name, $backpack_id);
+        $stmt_ins->execute();
+        $root_id = $stmt_ins->insert_id;
+    }
+
+    // 3. Sync Compartments
+    $comps = $conn->query("SELECT id, name FROM backpack_compartments WHERE backpack_id = $backpack_id ORDER BY sort_order ASC");
+    while ($comp = $comps->fetch_assoc()) {
+        // Check if item exists for this compartment AND this user
+        $stmt_c = $conn->prepare("SELECT id FROM packing_list_items WHERE packing_list_id = ? AND backpack_compartment_id = ? AND carrier_user_id = ?");
+        $stmt_c->bind_param("iii", $list_id, $comp['id'], $user_id);
+        $stmt_c->execute();
+        if ($stmt_c->get_result()->num_rows == 0) {
+            // Create Compartment Item
+            $c_name = $comp['name']; 
+            $stmt_ins_c = $conn->prepare("INSERT INTO packing_list_items (packing_list_id, carrier_user_id, name, backpack_compartment_id, parent_packing_list_item_id, quantity, article_id, order_index) VALUES (?, ?, ?, ?, ?, 1, NULL, 0)");
+            $stmt_ins_c->bind_param("iisii", $list_id, $user_id, $c_name, $comp['id'], $root_id);
+            $stmt_ins_c->execute();
+        }
+    }
+}
+
+// Helper to get backpacks for a specific user context
+function get_available_backpacks_for_user($conn, $target_user_id, $household_id) {
+    // Check connection
+    if (!$conn || $conn->connect_errno) {
+        // Reconnect or fail gracefully? 
+        // For now, assume caller must keep it open.
+        return []; 
+    }
+    
+    $bps = [];
+    $sql_bp = "SELECT id, name, user_id FROM backpacks WHERE user_id = ?";
+    if ($household_id) {
+        $sql_bp .= " OR household_id = ?";
+        $stmt_bp = $conn->prepare($sql_bp);
+        $stmt_bp->bind_param("ii", $target_user_id, $household_id);
+    } else {
+        $stmt_bp = $conn->prepare($sql_bp);
+        $stmt_bp->bind_param("i", $target_user_id);
+    }
+    $stmt_bp->execute();
+    $res_bp = $stmt_bp->get_result();
+    while ($row = $res_bp->fetch_assoc()) {
+        $bps[] = $row;
+    }
+    return $bps;
+}
+?>

src/backpacks.php

@@ -0,0 +1,137 @@
+<?php
+// backpacks.php - Verwaltung der Rucksäcke
+$page_title = "Rucksäcke";
+require_once 'db_connect.php';
+require_once 'header.php';
+
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+$user_id = $_SESSION['user_id'];
+$message = '';
+
+// Delete Action
+if (isset($_POST['delete_backpack_id'])) {
+    $delete_id = intval($_POST['delete_backpack_id']);
+    // Check ownership
+    $stmt = $conn->prepare("SELECT id FROM backpacks WHERE id = ? AND user_id = ?");
+    $stmt->bind_param("ii", $delete_id, $user_id);
+    $stmt->execute();
+    if ($stmt->get_result()->num_rows > 0) {
+        $stmt_del = $conn->prepare("DELETE FROM backpacks WHERE id = ?");
+        $stmt_del->bind_param("i", $delete_id);
+        if ($stmt_del->execute()) {
+            $message = '<div class="alert alert-success">Rucksack gelöscht.</div>';
+        } else {
+            $message = '<div class="alert alert-danger">Fehler beim Löschen: ' . $conn->error . '</div>';
+        }
+    } else {
+        $message = '<div class="alert alert-danger">Keine Berechtigung.</div>';
+    }
+}
+
+// Fetch Backpacks (Personal + Household)
+// Logic: Show my backpacks AND backpacks from my household (if I'm in one)
+$household_id = null;
+$stmt_hh = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_hh->bind_param("i", $user_id);
+$stmt_hh->execute();
+$res_hh = $stmt_hh->get_result();
+if ($row = $res_hh->fetch_assoc()) {
+    $household_id = $row['household_id'];
+}
+
+$backpacks = [];
+$sql = "SELECT b.*, u.username as owner_name 
+        FROM backpacks b 
+        JOIN users u ON b.user_id = u.id 
+        WHERE b.user_id = ?";
+
+if ($household_id) {
+    $sql .= " OR (b.household_id = ?)";
+}
+$sql .= " ORDER BY b.name ASC";
+
+$stmt = $conn->prepare($sql);
+if ($household_id) {
+    $stmt->bind_param("ii", $user_id, $household_id);
+} else {
+    $stmt->bind_param("i", $user_id);
+}
+$stmt->execute();
+$result = $stmt->get_result();
+while ($row = $result->fetch_assoc()) {
+    $backpacks[] = $row;
+}
+
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-hiking me-2"></i>Rucksäcke</h2>
+        <a href="edit_backpack.php" class="btn btn-sm btn-outline-light"><i class="fas fa-plus me-2"></i>Neuen Rucksack anlegen</a>
+    </div>
+    <div class="card-body">
+        <?php echo $message; ?>
+        
+        <?php if (empty($backpacks)): ?>
+            <div class="alert alert-info text-center">
+                Du hast noch keine Rucksäcke definiert. <a href="edit_backpack.php" class="alert-link">Lege jetzt deinen ersten Rucksack an!</a>
+            </div>
+        <?php else: ?>
+            <div class="row g-4">
+                <?php foreach ($backpacks as $bp): ?>
+                    <div class="col-md-6 col-lg-4">
+                        <div class="card h-100 shadow-sm">
+                            <div class="card-body">
+                                <div class="d-flex justify-content-between align-items-start mb-3">
+                                    <h5 class="card-title mb-0"><?php echo htmlspecialchars($bp['name']); ?></h5>
+                                    <?php if ($bp['user_id'] == $user_id): ?>
+                                        <span class="badge bg-primary">Meiner</span>
+                                    <?php else: ?>
+                                        <span class="badge bg-secondary">von <?php echo htmlspecialchars($bp['owner_name']); ?></span>
+                                    <?php endif; ?>
+                                </div>
+                                
+                                <p class="card-text text-muted small mb-2">
+                                    <?php echo htmlspecialchars($bp['manufacturer'] . ' ' . $bp['model']); ?>
+                                </p>
+                                
+                                <div class="d-flex justify-content-between mb-3">
+                                    <span><i class="fas fa-weight-hanging text-muted me-1"></i> <?php echo $bp['weight_grams']; ?> g</span>
+                                    <span><i class="fas fa-box-open text-muted me-1"></i> <?php echo $bp['volume_liters']; ?> L</span>
+                                </div>
+
+                                <!-- Compartments Preview -->
+                                <?php
+                                // Fetch compartment count
+                                $stmt_c = $conn->prepare("SELECT COUNT(*) as cnt FROM backpack_compartments WHERE backpack_id = ?");
+                                $stmt_c->bind_param("i", $bp['id']);
+                                $stmt_c->execute();
+                                $cnt = $stmt_c->get_result()->fetch_assoc()['cnt'];
+                                ?>
+                                <p class="small text-muted"><i class="fas fa-layer-group me-1"></i> <?php echo $cnt; ?> Fächer definiert</p>
+
+                            </div>
+                            <div class="card-footer bg-transparent border-top-0 d-flex justify-content-end gap-2">
+                                <?php if ($bp['user_id'] == $user_id): ?>
+                                    <a href="edit_backpack.php?id=<?php echo $bp['id']; ?>" class="btn btn-sm btn-outline-primary"><i class="fas fa-edit"></i> Bearbeiten</a>
+                                    <form method="post" onsubmit="return confirm('Rucksack wirklich löschen?');" class="d-inline">
+                                        <input type="hidden" name="delete_backpack_id" value="<?php echo $bp['id']; ?>">
+                                        <button type="submit" class="btn btn-sm btn-outline-danger"><i class="fas fa-trash"></i></button>
+                                    </form>
+                                <?php else: ?>
+                                    <button class="btn btn-sm btn-outline-secondary" disabled>Nur Eigentümer kann bearbeiten</button>
+                                <?php endif; ?>
+                            </div>
+                        </div>
+                    </div>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+</div>
+
+<?php require_once 'footer.php'; ?>

src/categories.php

@@ -0,0 +1,171 @@
+<?php
+// categories.php - Kategorienverwaltung
+// FINALE VERSION mit Haushaltslogik
+
+$page_title = "Kategorien im Haushalt";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php'; // Für die Logging-Funktion
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) {
+            $household_member_ids[] = $row['id'];
+        }
+    }
+    $stmt_members->close();
+}
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    if (isset($_POST['add_category'])) {
+        $category_name = trim($_POST['category_name']);
+        if (!empty($category_name)) {
+            $stmt = $conn->prepare("INSERT INTO categories (name, user_id) VALUES (?, ?)");
+            $stmt->bind_param("si", $category_name, $current_user_id);
+            if ($stmt->execute()) {
+                if ($household_id) {
+                    $log_message = htmlspecialchars($_SESSION['username']) . " hat die Kategorie '" . htmlspecialchars($category_name) . "' hinzugefügt.";
+                    log_household_action($conn, $household_id, $current_user_id, $log_message);
+                }
+                $message = '<div class="alert alert-success" role="alert">Kategorie erfolgreich hinzugefügt!</div>';
+            } else { /* ... */ }
+            $stmt->close();
+        } else { /* ... */ }
+    } 
+    elseif (isset($_POST['edit_category'])) {
+        // ...
+    }
+} 
+elseif (isset($_GET['action']) && $_GET['action'] == 'delete' && isset($_GET['id'])) {
+    // ...
+}
+
+$stmt_load = $conn->prepare("SELECT c.id, c.name, c.user_id, u.username as creator_name FROM categories c JOIN users u ON c.user_id = u.id WHERE c.user_id IN ($placeholders) ORDER BY c.name ASC");
+$stmt_load->bind_param($types, ...$household_member_ids);
+$stmt_load->execute();
+$categories_list = $stmt_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_load->close();
+$conn->close();
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0">Kategorien im Haushalt</h2>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+
+        <div class="card bg-light mb-5">
+            <div class="card-body">
+                <h5 class="card-title mb-3">Neue Kategorie hinzufügen</h5>
+                <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post" class="row g-3 align-items-end">
+                    <div class="col-sm-8">
+                        <label for="category_name" class="form-label visually-hidden">Neue Kategorie</label>
+                        <input type="text" class="form-control" id="category_name" name="category_name" placeholder="Name der neuen Kategorie" required>
+                    </div>
+                    <div class="col-sm-4">
+                        <button type="submit" name="add_category" class="btn btn-primary w-100"><i class="fas fa-plus-circle me-2"></i>Hinzufügen</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+
+        <h5 class="mb-3">Bestehende Kategorien</h5>
+        <?php if (empty($categories_list)): ?>
+            <div class="alert alert-info text-center">Keine Kategorien im Haushalt gefunden.</div>
+        <?php else: ?>
+            <div class="list-group">
+                <?php foreach ($categories_list as $category): ?>
+                    <div class="list-group-item d-flex justify-content-between align-items-center">
+                        <div>
+                            <i class="fas fa-tag text-muted me-2"></i>
+                            <span><?php echo htmlspecialchars($category['name']); ?></span>
+                            <?php if ($category['user_id'] != $current_user_id): ?>
+                                <small class="text-muted ms-2">(von <?php echo htmlspecialchars($category['creator_name']); ?>)</small>
+                            <?php endif; ?>
+                        </div>
+                        <?php if ($category['user_id'] == $current_user_id): ?>
+                        <div class="btn-group">
+                            <button type="button" class="btn btn-sm btn-outline-primary" title="Bearbeiten" data-bs-toggle="modal" data-bs-target="#editCategoryModal"
+                                data-id="<?php echo htmlspecialchars($category['id']); ?>" data-name="<?php echo htmlspecialchars($category['name']); ?>">
+                                <i class="fas fa-edit"></i>
+                            </button>
+                            <a href="categories.php?action=delete&id=<?php echo htmlspecialchars($category['id']); ?>" class="btn btn-sm btn-outline-danger" title="Löschen" onclick="return confirm('Sind Sie sicher, dass Sie diese Kategorie löschen möchten? Artikel, die dieser Kategorie zugewiesen sind, verlieren ihre Zuordnung.')">
+                                <i class="fas fa-trash-alt"></i>
+                            </a>
+                        </div>
+                        <?php endif; ?>
+                    </div>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+</div>
+
+<div class="modal fade" id="editCategoryModal" tabindex="-1" aria-labelledby="editCategoryModalLabel" aria-hidden="true">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title" id="editCategoryModalLabel">Kategorie bearbeiten</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+            </div>
+            <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
+                <div class="modal-body">
+                    <input type="hidden" name="category_id" id="edit_category_id">
+                    <div class="mb-3">
+                        <label for="edit_category_name" class="form-label">Kategoriename</label>
+                        <input type="text" class="form-control" id="edit_category_name" name="category_name" required>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
+                    <button type="submit" name="edit_category" class="btn btn-primary">Änderungen speichern</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
+
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    var editCategoryModal = document.getElementById('editCategoryModal');
+    if (editCategoryModal) {
+        editCategoryModal.addEventListener('show.bs.modal', function (event) {
+            var button = event.relatedTarget;
+            var categoryId = button.getAttribute('data-id');
+            var categoryName = button.getAttribute('data-name');
+            var modalIdInput = editCategoryModal.querySelector('#edit_category_id');
+            var modalNameInput = editCategoryModal.querySelector('#edit_category_name');
+            if (modalIdInput) modalIdInput.value = categoryId;
+            if (modalNameInput) modalNameInput.value = categoryName;
+        });
+    }
+});
+</script>
+
+<?php require_once 'footer.php'; ?>

src/db_connect.php

@@ -0,0 +1,41 @@
+<?php
+// db_connect.php - Zentrale Datei für die Datenbankverbindung
+
+// NEU: Lade Zugangsdaten aus einer sicheren Konfigurationsdatei.
+// Diese Datei sollte außerhalb deines öffentlichen Web-Verzeichnisses liegen!
+// z.B. in /var/www/config/packliste.ini
+$config_path = __DIR__ . '/../config.ini'; // Annahme: die Datei liegt ein Verzeichnis höher
+
+if (!file_exists($config_path)) {
+    die("Kritischer Fehler: Die Konfigurationsdatei wurde nicht gefunden. Bitte erstellen Sie die 'config.ini'.");
+}
+
+$config = parse_ini_file($config_path);
+
+if ($config === false) {
+    die("Kritischer Fehler: Konfigurationsdatei konnte nicht gelesen werden.");
+}
+
+$servername = $config['servername'];
+$username = $config['username'];
+$password = $config['password'];
+$dbname = $config['dbname'];
+
+
+// Verbindung herstellen
+$conn = new mysqli($servername, $username, $password, $dbname);
+
+// Verbindung prüfen
+if ($conn->connect_error) {
+    // In einer Produktivumgebung sollte der Fehler geloggt, aber nicht dem Benutzer angezeigt werden.
+    error_log("Datenbankverbindungsfehler: " . $conn->connect_error);
+    die("Verbindung zur Datenbank konnte nicht hergestellt werden. Bitte versuchen Sie es später erneut.");
+}
+
+// Zeichensatz auf UTF-8 setzen, um Probleme mit Sonderzeichen zu vermeiden
+$conn->set_charset("utf8mb4");
+
+// NEU: Setze eine Standard-Zeitzone, um konsistente Zeitstempel zu gewährleisten.
+date_default_timezone_set('Europe/Berlin');
+
+?>

src/delete_article.php

@@ -0,0 +1,69 @@
+<?php
+// delete_article.php - Artikel löschen
+// KORREKTUR: Berechtigungsprüfung für Haushaltsmitglieder hinzugefügt.
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+
+$article_id_to_delete = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$current_user_id = $_SESSION['user_id'];
+
+if ($article_id_to_delete > 0) {
+    // Lade Haushalts-ID des aktuellen Benutzers
+    $stmt_user_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+    $stmt_user_household->bind_param("i", $current_user_id);
+    $stmt_user_household->execute();
+    $current_user_household_id = $stmt_user_household->get_result()->fetch_assoc()['household_id'];
+    $stmt_user_household->close();
+    
+    // Artikeldetails abrufen, um user_id und household_id zu prüfen
+    $stmt_check = $conn->prepare("SELECT user_id, household_id FROM articles WHERE id = ?");
+    $stmt_check->bind_param("i", $article_id_to_delete);
+    $stmt_check->execute();
+    $result_check = $stmt_check->get_result();
+
+    if ($result_check->num_rows == 1) {
+        $article = $result_check->fetch_assoc();
+        
+        $can_delete = false;
+        $is_owner = ($article['user_id'] == $current_user_id);
+        $is_household_article = !empty($article['household_id']) && $article['household_id'] == $current_user_household_id;
+
+        if ($is_owner || $is_household_article) {
+            $can_delete = true;
+        }
+
+        if ($can_delete) {
+            $stmt_delete = $conn->prepare("DELETE FROM articles WHERE id = ?");
+            $stmt_delete->bind_param("i", $article_id_to_delete);
+            if ($stmt_delete->execute()) {
+                $_SESSION['message'] = '<div class="alert alert-success" role="alert">Artikel erfolgreich gelöscht!</div>';
+            } else {
+                $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Fehler beim Löschen des Artikels: ' . $stmt_delete->error . '</div>';
+            }
+            $stmt_delete->close();
+        } else {
+            $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Sie sind nicht berechtigt, diesen Artikel zu löschen.</div>';
+        }
+    } else {
+        $_SESSION['message'] = '<div class="alert alert-warning" role="alert">Artikel nicht gefunden.</div>';
+    }
+    $stmt_check->close();
+} else {
+    $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Keine Artikel-ID zum Löschen angegeben.</div>';
+}
+
+$conn->close();
+
+// Zurück zur Artikelliste
+header("Location: articles.php");
+exit;
+?>

src/delete_packing_list.php

@@ -0,0 +1,56 @@
+<?php
+// delete_packing_list.php - Packliste löschen
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php'; // Für die Logging-Funktion
+
+$packing_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$current_user_id = $_SESSION['user_id'];
+
+if ($packing_list_id > 0) {
+    // Prüfen, ob der Benutzer berechtigt ist, diese Packliste zu löschen (nur der Ersteller)
+    $stmt_check = $conn->prepare("SELECT user_id, name, household_id FROM packing_lists WHERE id = ?");
+    $stmt_check->bind_param("i", $packing_list_id);
+    $stmt_check->execute();
+    $result_check = $stmt_check->get_result();
+
+    if ($result_check->num_rows == 1) {
+        $packing_list = $result_check->fetch_assoc();
+        if ($packing_list['user_id'] == $current_user_id) {
+            $stmt = $conn->prepare("DELETE FROM packing_lists WHERE id = ?");
+            $stmt->bind_param("i", $packing_list_id);
+            if ($stmt->execute()) {
+                if ($packing_list['household_id']) {
+                    $log_message = htmlspecialchars($_SESSION['username']) . " hat die Packliste '" . htmlspecialchars($packing_list['name']) . "' gelöscht.";
+                    log_household_action($conn, $packing_list['household_id'], $current_user_id, $log_message);
+                }
+                $_SESSION['message'] = '<div class="alert alert-success" role="alert">Packliste erfolgreich gelöscht!</div>';
+            } else {
+                $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Fehler beim Löschen der Packliste: ' . $stmt->error . '</div>';
+            }
+            $stmt->close();
+        } else {
+            $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Sie sind nicht berechtigt, diese Packliste zu löschen.</div>';
+        }
+    } else {
+        $_SESSION['message'] = '<div class="alert alert-warning" role="alert">Packliste nicht gefunden.</div>';
+    }
+    $stmt_check->close();
+} else {
+    $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Keine Packlisten-ID zum Löschen angegeben.</div>';
+}
+
+$conn->close();
+
+header("Location: packing_lists.php");
+exit;
+?>

src/duplicate_packing_list.php

@@ -0,0 +1,128 @@
+<?php
+// duplicate_packing_list.php - Logik zum Duplizieren einer kompletten Packliste
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+$current_user_id = $_SESSION['user_id'];
+$original_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+
+if ($original_list_id <= 0) {
+    $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Ungültige Packlisten-ID zum Duplizieren.</div>';
+    header("Location: packing_lists.php");
+    exit;
+}
+
+$conn->begin_transaction();
+
+try {
+    // 1. Originale Packliste abrufen, um den Namen zu bekommen und die Berechtigung zu prüfen
+    $stmt_original = $conn->prepare("SELECT name, description FROM packing_lists WHERE id = ? AND user_id = ?");
+    $stmt_original->bind_param("ii", $original_list_id, $current_user_id);
+    $stmt_original->execute();
+    $result_original = $stmt_original->get_result();
+    if ($result_original->num_rows === 0) {
+        throw new Exception("Originale Packliste nicht gefunden oder keine Berechtigung.");
+    }
+    $original_list = $result_original->fetch_assoc();
+    $stmt_original->close();
+
+    // 2. Neuen Namen für die Kopie finden (z.B. "Tour (Kopie 1)", "Tour (Kopie 2)", etc.)
+    $base_name = $original_list['name'];
+    $copy_name = '';
+    $copy_number = 1;
+    while (true) {
+        $suffix = " (Kopie " . $copy_number . ")";
+        $test_name = $base_name . $suffix;
+        
+        $stmt_check_name = $conn->prepare("SELECT id FROM packing_lists WHERE name = ? AND user_id = ?");
+        $stmt_check_name->bind_param("si", $test_name, $current_user_id);
+        $stmt_check_name->execute();
+        $stmt_check_name->store_result();
+        
+        if ($stmt_check_name->num_rows === 0) {
+            $copy_name = $test_name;
+            $stmt_check_name->close();
+            break;
+        }
+        $stmt_check_name->close();
+        $copy_number++;
+    }
+
+    // 3. Neue Packliste in die `packing_lists` Tabelle einfügen
+    $stmt_new_list = $conn->prepare("INSERT INTO packing_lists (user_id, name, description) VALUES (?, ?, ?)");
+    $stmt_new_list->bind_param("iss", $current_user_id, $copy_name, $original_list['description']);
+    if (!$stmt_new_list->execute()) throw new Exception("Fehler beim Erstellen des Listenkopfeintrags.");
+    $new_list_id = $conn->insert_id;
+    $stmt_new_list->close();
+
+    // KORREKTUR: Komplette Überarbeitung der Kopierlogik
+    
+    // 4. Alle Artikel aus der originalen Liste mit ihrer ID holen
+    $stmt_items = $conn->prepare("SELECT id, article_id, quantity, parent_packing_list_item_id, carrier_user_id FROM packing_list_items WHERE packing_list_id = ?");
+    $stmt_items->bind_param("i", $original_list_id);
+    $stmt_items->execute();
+    $result_items = $stmt_items->get_result();
+    $original_items = [];
+    while ($row = $result_items->fetch_assoc()) {
+        $original_items[] = $row;
+    }
+    $stmt_items->close();
+
+    if (!empty($original_items)) {
+        // 5. Hierarchie-Klonen in zwei Schritten
+        $old_to_new_id_map = []; // Speichert [alte_item_id] => neue_item_id
+
+        // Schritt 5a: Alle Items ohne Parent-Info kopieren und die ID-Zuordnung speichern
+        $stmt_insert_item = $conn->prepare("INSERT INTO packing_list_items (packing_list_id, article_id, quantity, carrier_user_id) VALUES (?, ?, ?, ?)");
+        if (!$stmt_insert_item) throw new Exception("DB Prepare Fehler (Item Insert)");
+
+        foreach ($original_items as $item) {
+            $stmt_insert_item->bind_param("iiii", $new_list_id, $item['article_id'], $item['quantity'], $item['carrier_user_id']);
+            if (!$stmt_insert_item->execute()) throw new Exception("Fehler beim Kopieren von Artikel ID " . $item['article_id']);
+            $new_item_id = $conn->insert_id;
+            $old_to_new_id_map[$item['id']] = $new_item_id;
+        }
+        $stmt_insert_item->close();
+
+        // Schritt 5b: Die Parent-IDs für die neu erstellten Items aktualisieren
+        $stmt_update_parent = $conn->prepare("UPDATE packing_list_items SET parent_packing_list_item_id = ? WHERE id = ?");
+        if (!$stmt_update_parent) throw new Exception("DB Prepare Fehler (Parent Update)");
+
+        foreach ($original_items as $item) {
+            // Wenn das Original-Item einen Parent hatte...
+            if (!empty($item['parent_packing_list_item_id'])) {
+                $old_parent_id = $item['parent_packing_list_item_id'];
+                
+                // Stelle sicher, dass der Parent auch in unserer Map existiert
+                if (isset($old_to_new_id_map[$old_parent_id])) {
+                    $new_parent_id = $old_to_new_id_map[$old_parent_id];
+                    $new_child_id = $old_to_new_id_map[$item['id']];
+
+                    $stmt_update_parent->bind_param("ii", $new_parent_id, $new_child_id);
+                    if (!$stmt_update_parent->execute()) throw new Exception("Fehler beim Setzen der Hierarchie für Item " . $new_child_id);
+                }
+            }
+        }
+        $stmt_update_parent->close();
+    }
+    
+    $conn->commit();
+    $_SESSION['message'] = '<div class="alert alert-success" role="alert">Packliste erfolgreich zu "'.$copy_name.'" dupliziert!</div>';
+
+} catch (Exception $e) {
+    $conn->rollback();
+    $_SESSION['message'] = '<div class="alert alert-danger" role="alert">Fehler beim Duplizieren: ' . $e->getMessage() . '</div>';
+    // NEU: Logge den tatsächlichen Fehler für den Admin
+    error_log("Fehler beim Duplizieren der Packliste: " . $e->getMessage());
+}
+
+header("Location: packing_lists.php");
+exit;
+?>

src/edit_article.php

@@ -0,0 +1,427 @@
+<?php
+// edit_article.php - Formular zum Bearbeiten eines vorhandenen Artikels
+// FINALE KORREKTUR: Alle besprochenen Fehler behoben und Komponente-Logik korrekt implementiert.
+// KORREKTUR 2: SSL-Verifizierung und @-Fehlerunterdrückung korrigiert.
+
+$page_title = "Artikel bearbeiten";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+$article_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$article_data = null;
+$can_edit = false;
+
+$name = ''; $weight_grams = ''; $category_id = null; $consumable = 0; $quantity_owned = 1;
+$product_url = ''; $manufacturer_id = null; $product_designation = '';
+$storage_location_id = null;
+$parent_article_id = null;
+
+$display_current_image_path = 'keinbild.png';
+$display_image_url_in_input = '';
+$is_local_uploaded_image = false;
+$upload_dir = 'uploads/images/';
+if (!is_dir($upload_dir)) { @mkdir($upload_dir, 0777, true); }
+
+function save_image_from_url($url, $upload_dir) {
+    // KORREKTUR: Unsichere SSL-Optionen entfernt, @-Operator entfernt
+    $context_options = ["http" => ["header" => "User-Agent: Mozilla/5.0\r\n", "timeout" => 10]];
+    $context = stream_context_create($context_options);
+
+    // Fehlerbehandlung für file_get_contents
+    $image_data = file_get_contents($url, false, $context);
+    if ($image_data === false) { 
+        return [false, "Bild konnte von der URL nicht heruntergeladen werden. Überprüfen Sie den Link und die Erreichbarkeit."]; 
+    }
+
+    // Fehlerbehandlung für getimagesizefromstring
+    $image_info = getimagesizefromstring($image_data);
+    if ($image_info === false) { 
+        return [false, "Die angegebene URL führt nicht zu einem gültigen Bild."]; 
+    }
+    
+    $allowed_mime_types = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'];
+    if (!in_array($image_info['mime'], $allowed_mime_types)) { 
+        return [false, "Nicht unterstützter Bildtyp: " . htmlspecialchars($image_info['mime'])]; 
+    }
+
+    $extension = image_type_to_extension($image_info[2], false);
+    $unique_file_name = uniqid('img_url_', true) . '.' . $extension;
+    $destination = $upload_dir . $unique_file_name;
+
+    if (file_put_contents($destination, $image_data)) { 
+        return [true, $destination]; 
+    }
+
+    return [false, "Bild konnte nicht auf dem Server gespeichert werden."];
+}
+
+function save_image_from_base64($base64_string, $upload_dir) {
+    if (preg_match('/^data:image\/(\w+);base64,/', $base64_string, $type)) {
+        $data = substr($base64_string, strpos($base64_string, ',') + 1);
+        $type = strtolower($type[1]);
+        if (!in_array($type, ['jpg', 'jpeg', 'png', 'gif'])) { return [false, "Nicht unterstützter Bildtyp."]; }
+        $data = base64_decode($data);
+        if ($data === false) { return [false, "Base64-Dekodierung fehlgeschlagen."]; }
+    } else { return [false, "Ungültiger Base64-String."]; }
+    $unique_file_name = uniqid('img_paste_', true) . '.' . $type;
+    $destination = $upload_dir . $unique_file_name;
+    if (file_put_contents($destination, $data)) { return [true, $destination]; }
+    return [false, "Bild konnte nicht gespeichert werden."];
+}
+
+$stmt_household_check = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household_check->bind_param("i", $current_user_id);
+$stmt_household_check->execute();
+$household_id_for_user = $stmt_household_check->get_result()->fetch_assoc()['household_id'];
+$stmt_household_check->close();
+
+if ($article_id > 0) {
+    $stmt_load_article = $conn->prepare("SELECT * FROM articles WHERE id = ?");
+    if ($stmt_load_article) {
+        $stmt_load_article->bind_param("i", $article_id);
+        $stmt_load_article->execute();
+        $result = $stmt_load_article->get_result();
+        if ($result->num_rows == 1) {
+            $article_data = $result->fetch_assoc();
+            
+            $is_owner = ($article_data['user_id'] == $current_user_id);
+            $is_household_article = !empty($article_data['household_id']);
+            $is_in_same_household = ($is_household_article && $article_data['household_id'] == $household_id_for_user);
+
+            if ($is_owner || $is_in_same_household) {
+                $can_edit = true;
+            } else {
+                $message = '<div class="alert alert-danger" role="alert">Sie sind nicht berechtigt, diesen Artikel zu bearbeiten.</div>';
+                $article_data = null;
+            }
+        } else { $message = '<div class="alert alert-warning" role="alert">Artikel nicht gefunden.</div>'; }
+        $stmt_load_article->close();
+    }
+}
+
+if ($can_edit) {
+    $name = $article_data['name'];
+    $weight_grams = $article_data['weight_grams'];
+    $quantity_owned = $article_data['quantity_owned'];
+    $category_id = $article_data['category_id'];
+    $consumable = $article_data['consumable'];
+    $product_url = $article_data['product_url'] ?? '';
+    $manufacturer_id = $article_data['manufacturer_id'];
+    $product_designation = $article_data['product_designation'] ?? '';
+    $storage_location_id = $article_data['storage_location_id'];
+    $parent_article_id = $article_data['parent_article_id'];
+    if (!empty($article_data['image_url'])) {
+        $display_current_image_path = htmlspecialchars($article_data['image_url']);
+        if (strpos($article_data['image_url'], $upload_dir) === 0) {
+            $is_local_uploaded_image = true;
+        } else {
+            $display_image_url_in_input = htmlspecialchars($article_data['image_url']);
+        }
+    }
+
+    $household_member_ids = [$current_user_id];
+    if ($household_id_for_user) {
+        $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+        $stmt_members->bind_param("i", $household_id_for_user);
+        $stmt_members->execute();
+        $result_members = $stmt_members->get_result();
+        while ($row = $result_members->fetch_assoc()) {
+            if (!in_array($row['id'], $household_member_ids)) { $household_member_ids[] = $row['id']; }
+        }
+        $stmt_members->close();
+    }
+    $placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+    $types = str_repeat('i', count($household_member_ids));
+    $stmt_cat_load = $conn->prepare("SELECT id, name FROM categories WHERE user_id IN ($placeholders) ORDER BY name ASC");
+    $stmt_cat_load->bind_param($types, ...$household_member_ids);
+    $stmt_cat_load->execute();
+    $categories = $stmt_cat_load->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_cat_load->close();
+    $stmt_man_load = $conn->prepare("SELECT id, name FROM manufacturers WHERE user_id IN ($placeholders) ORDER BY name ASC");
+    $stmt_man_load->bind_param($types, ...$household_member_ids);
+    $stmt_man_load->execute();
+    $manufacturers = $stmt_man_load->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_man_load->close();
+    $stmt_loc_load = $conn->prepare("SELECT id, name, parent_id FROM storage_locations WHERE user_id IN ($placeholders) ORDER BY parent_id, name");
+    $stmt_loc_load->bind_param($types, ...$household_member_ids);
+    $stmt_loc_load->execute();
+    $all_locations = $stmt_loc_load->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_loc_load->close();
+    $storage_locations_structured = [];
+    foreach ($all_locations as $loc) { if ($loc['parent_id'] === NULL) { if (!isset($storage_locations_structured[$loc['id']])) { $storage_locations_structured[$loc['id']] = ['name' => $loc['name'], 'children' => []]; } } }
+    foreach ($all_locations as $loc) { if ($loc['parent_id'] !== NULL && isset($storage_locations_structured[$loc['parent_id']])) { $storage_locations_structured[$loc['parent_id']]['children'][] = $loc; } }
+    
+    $stmt_parent_articles = $conn->prepare("SELECT a.id, a.name, m.name as manufacturer_name, a.product_designation FROM articles a LEFT JOIN manufacturers m ON a.manufacturer_id = m.id WHERE (a.user_id IN ($placeholders) OR a.household_id = ?) AND a.parent_article_id IS NULL AND a.id != ? ORDER BY a.name ASC");
+    $all_parent_params = array_merge($household_member_ids, [$household_id_for_user, $article_id]);
+    $all_parent_types = $types . 'ii';
+    $stmt_parent_articles->bind_param($all_parent_types, ...$all_parent_params);
+    $stmt_parent_articles->execute();
+    $parent_articles = $stmt_parent_articles->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_parent_articles->close();
+}
+
+if ($_SERVER["REQUEST_METHOD"] == "POST" && $can_edit) {
+    $name = trim($_POST['name']);
+    $weight_grams = intval($_POST['weight_grams']);
+    $consumable = isset($_POST['consumable']) ? 1 : 0;
+    $quantity_owned = ($consumable == 1) ? 1 : intval($_POST['quantity_owned']);
+    $product_url_for_db = !empty(trim($_POST['product_url'])) ? trim($_POST['product_url']) : NULL;
+    $product_designation_for_db = !empty(trim($_POST['product_designation'])) ? trim($_POST['product_designation']) : NULL;
+    $pasted_image_data = $_POST['pasted_image_data'] ?? '';
+    $image_url_from_input = trim($_POST['image_url']);
+    $is_household_item = isset($_POST['is_household_item']) && $household_id_for_user ? $household_id_for_user : NULL;
+    $storage_location_id = !empty($_POST['storage_location_id']) ? intval($_POST['storage_location_id']) : NULL;
+    $parent_article_id = !empty($_POST['parent_article_id']) ? intval($_POST['parent_article_id']) : NULL;
+
+    if (isset($_POST['manufacturer_id']) && $_POST['manufacturer_id'] === 'new') {
+        $new_manufacturer_name = trim($_POST['new_manufacturer_name']);
+        if (!empty($new_manufacturer_name)) {
+            $stmt_man = $conn->prepare("INSERT INTO manufacturers (name, user_id) VALUES (?, ?)");
+            $stmt_man->bind_param("si", $new_manufacturer_name, $current_user_id);
+            if ($stmt_man->execute()) { $manufacturer_id = $conn->insert_id; }
+            $stmt_man->close();
+        } else { $manufacturer_id = NULL; }
+    } else { $manufacturer_id = !empty($_POST['manufacturer_id']) ? intval($_POST['manufacturer_id']) : NULL; }
+    
+    if (isset($_POST['category_id']) && $_POST['category_id'] === 'new') {
+        $new_category_name = trim($_POST['new_category_name']);
+        if (!empty($new_category_name)) {
+            $stmt_cat = $conn->prepare("INSERT INTO categories (name, user_id) VALUES (?, ?)");
+            $stmt_cat->bind_param("si", $new_category_name, $current_user_id);
+            if($stmt_cat->execute()){ $category_id = $conn->insert_id; }
+            $stmt_cat->close();
+        } else { $category_id = NULL; }
+    } else { $category_id = !empty($_POST['category_id']) ? intval($_POST['category_id']) : NULL; }
+    
+    $image_url_for_db = $article_data['image_url'];
+    $image_error = '';
+    function delete_old_image_if_local($article_data, $upload_dir) {
+        if (!empty($article_data['image_url']) && strpos($article_data['image_url'], $upload_dir) === 0 && file_exists($article_data['image_url'])) {
+            @unlink($article_data['image_url']);
+        }
+    }
+    if (isset($_POST['delete_image_checkbox'])) {
+        delete_old_image_if_local($article_data, $upload_dir);
+        $image_url_for_db = NULL;
+    }
+    elseif (!empty($pasted_image_data)) {
+        delete_old_image_if_local($article_data, $upload_dir);
+        list($success, $result) = save_image_from_base64($pasted_image_data, $upload_dir);
+        if ($success) { $image_url_for_db = $result; } else { $image_error = $result; }
+    }
+    elseif (isset($_FILES['image_file']) && $_FILES['image_file']['error'] == UPLOAD_ERR_OK) {
+        delete_old_image_if_local($article_data, $upload_dir);
+        $unique_file_name = uniqid('img_', true) . '.' . strtolower(pathinfo($_FILES['image_file']['name'], PATHINFO_EXTENSION));
+        $destination_path = $upload_dir . $unique_file_name;
+        if (move_uploaded_file($_FILES['image_file']['tmp_name'], $destination_path)) {
+            $image_url_for_db = $destination_path;
+        } else { $image_error = "Fehler beim Verschieben der hochgeladenen Datei."; }
+    }
+    elseif (!empty($image_url_from_input) && $image_url_from_input !== $display_image_url_in_input) {
+        delete_old_image_if_local($article_data, $upload_dir);
+        list($success, $result) = save_image_from_url($image_url_from_input, $upload_dir);
+        if ($success) { $image_url_for_db = $result; } else { $image_error = $result; }
+    }
+    if (!empty($image_error)) {
+        $message .= '<div class="alert alert-warning" role="alert">Bild-Fehler: ' . htmlspecialchars($image_error) . ' Der Artikel wurde trotzdem aktualisiert.</div>';
+    }
+    if (empty($name) || $weight_grams < 0) {
+        $message .= '<div class="alert alert-danger" role="alert">Name und Gewicht sind Pflichtfelder und das Gewicht muss positiv sein.</div>';
+    } else {
+        $stmt_update = $conn->prepare("UPDATE articles SET name = ?, weight_grams = ?, quantity_owned = ?, category_id = ?, consumable = ?, image_url = ?, product_url = ?, manufacturer_id = ?, product_designation = ?, household_id = ?, storage_location_id = ?, parent_article_id = ? WHERE id = ?");
+        if ($stmt_update) {
+            $stmt_update->bind_param("siiisssisiiii", $name, $weight_grams, $quantity_owned, $category_id, $consumable, $image_url_for_db, $product_url_for_db, $manufacturer_id, $product_designation_for_db, $is_household_item, $storage_location_id, $parent_article_id, $article_id);
+            if ($stmt_update->execute()) {
+                if ($household_id_for_user) {
+                    $log_message = htmlspecialchars($_SESSION['username']) . " hat den Artikel '" . htmlspecialchars($name) . "' bearbeitet.";
+                    log_household_action($conn, $household_id_for_user, $current_user_id, $log_message);
+                }
+                $message .= '<div class="alert alert-success" role="alert">Artikel erfolgreich aktualisiert!</div>';
+                echo "<script>setTimeout(() => window.location.href = 'edit_article.php?id=$article_id', 1000);</script>";
+            } else {
+                $message .= '<div class="alert alert-danger" role="alert">Fehler beim Aktualisieren: ' . $stmt_update->error . '</div>';
+            }
+            $stmt_update->close();
+        }
+    }
+}
+$conn->close();
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-edit me-2"></i>Artikel bearbeiten</h2>
+        <a href="articles.php" class="btn btn-sm btn-outline-light"><i class="fas fa-arrow-left me-2"></i>Zur Übersicht</a>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+        <?php if ($article_data): ?>
+        <form action="edit_article.php?id=<?php echo htmlspecialchars($article_id); ?>" method="post" enctype="multipart/form-data">
+            <input type="hidden" name="pasted_image_data" id="pasted_image_data">
+            <div class="row g-4">
+                <div class="col-lg-7 d-flex flex-column">
+                    <div class="card section-card mb-4">
+                        <div class="card-header"><h5 class="mb-0"><i class="fas fa-info-circle me-2"></i>Stammdaten</h5></div>
+                        <div class="card-body">
+                            <div class="mb-3"><label for="name" class="form-label">Artikelname*</label><input type="text" class="form-control" id="name" name="name" value="<?php echo htmlspecialchars($name); ?>" required></div>
+                            <div class="row">
+                                <div class="col-md-6 mb-3"><label for="manufacturer_id" class="form-label">Hersteller</label><select class="form-select" id="manufacturer_id" name="manufacturer_id"><option value="">-- Kein Hersteller --</option><option value="new">-- Neuen Hersteller hinzufügen --</option><?php foreach ($manufacturers as $man): ?><option value="<?php echo htmlspecialchars($man['id']); ?>" <?php if ($manufacturer_id == $man['id']) echo 'selected'; ?>><?php echo htmlspecialchars($man['name']); ?></option><?php endforeach; ?></select><div id="new_manufacturer_container" class="mt-2" style="display: none;"><input type="text" class="form-control" name="new_manufacturer_name" placeholder="Name des neuen Herstellers"></div></div>
+                                <div class="col-md-6 mb-3"><label for="product_designation" class="form-label">Produktbezeichnung / Modell</label><input type="text" class="form-control" id="product_designation" name="product_designation" value="<?php echo htmlspecialchars($product_designation); ?>" placeholder="z.B. Forclaz MT500"></div>
+                            </div>
+                            <div class="mb-3">
+                                <label for="parent_article_id" class="form-label">Ist Komponente von (optional)</label>
+                                <select class="form-select" id="parent_article_id" name="parent_article_id">
+                                    <option value="">-- Kein Hauptartikel --</option>
+                                    <?php foreach ($parent_articles as $parent): 
+                                        $parent_details = $parent['manufacturer_name'] ? htmlspecialchars($parent['manufacturer_name']) . ' - ' : '';
+                                        $parent_details .= htmlspecialchars($parent['product_designation'] ?? '');
+                                    ?>
+                                        <option value="<?php echo $parent['id']; ?>" <?php if($parent_article_id == $parent['id']) echo 'selected'; ?>><?php echo htmlspecialchars($parent['name'] . ' (' . $parent_details . ')'); ?></option>
+                                    <?php endforeach; ?>
+                                </select>
+                            </div>
+                        </div>
+                    </div>
+                    <div class="card section-card">
+                         <div class="card-header"><h5 class="mb-0"><i class="fas fa-cogs me-2"></i>Eigenschaften & Ort</h5></div>
+                        <div class="card-body">
+                            <div class="row">
+                                <div class="col-md-6 mb-3"><label for="weight_grams" class="form-label">Gewicht*</label><div class="input-group"><span class="input-group-text"><i class="fas fa-weight-hanging"></i></span><input type="number" class="form-control" id="weight_grams" name="weight_grams" value="<?php echo htmlspecialchars($weight_grams); ?>" required min="0"><span class="input-group-text">g</span></div></div>
+                                <div class="col-md-6 mb-3"><label for="quantity_owned" class="form-label">Anzahl im Besitz</label><input type="number" class="form-control" id="quantity_owned" name="quantity_owned" value="<?php echo htmlspecialchars($quantity_owned); ?>" min="1" <?php if($consumable) echo 'disabled'; ?>></div>
+                                <div class="col-12 mb-3"><label for="category_id" class="form-label">Kategorie</label><select class="form-select" id="category_id" name="category_id"><option value="">-- Keine Kategorie --</option><option value="new">-- Neue Kategorie hinzufügen --</option><?php foreach ($categories as $cat): ?><option value="<?php echo htmlspecialchars($cat['id']); ?>" <?php if ($category_id == $cat['id']) echo 'selected'; ?>><?php echo htmlspecialchars($cat['name']); ?></option><?php endforeach; ?></select><div id="new_category_container" class="mt-2" style="display: none;"><input type="text" class="form-control" name="new_category_name" placeholder="Name der neuen Kategorie"></div></div>
+                                <div class="col-12 mb-3"><label for="storage_location_id" class="form-label">Lagerort</label><select class="form-select" id="storage_location_id" name="storage_location_id"><option value="">-- Kein fester Ort --</option><?php foreach ($storage_locations_structured as $loc1_id => $loc1_data): ?><optgroup label="<?php echo htmlspecialchars($loc1_data['name']); ?>"><?php foreach ($loc1_data['children'] as $loc2): ?><option value="<?php echo $loc2['id']; ?>" <?php if ($storage_location_id == $loc2['id']) echo 'selected'; ?>><?php echo htmlspecialchars($loc2['name']); ?></option><?php endforeach; ?></optgroup><?php endforeach; ?></select></div>
+                            </div>
+                            <hr class="my-3">
+                            <div class="form-check form-switch mb-2"><input class="form-check-input" type="checkbox" role="switch" id="consumable" name="consumable" value="1" <?php echo $consumable ? 'checked' : ''; ?>><label class="form-check-label" for="consumable">Verbrauchsartikel (unbegrenzte Anzahl)</label></div>
+                            <?php if ($household_id_for_user): ?>
+                            <div class="form-check form-switch"><input class="form-check-input" type="checkbox" role="switch" id="is_household_item" name="is_household_item" value="1" <?php echo !empty($article_data['household_id']) ? 'checked' : ''; ?>><label class="form-check-label" for="is_household_item">Für den gesamten Haushalt freigeben</label></div>
+                            <?php endif; ?>
+                        </div>
+                    </div>
+                </div>
+                <div class="col-lg-5">
+                    <div class="card section-card h-100">
+                        <div class="card-header"><h5 class="mb-0"><i class="fas fa-image me-2"></i>Bild & Produktseite</h5></div>
+                        <div class="card-body d-flex flex-column">
+                            <div class="mb-3"><label for="product_url" class="form-label">Produktseite (URL)</label><input type="url" class="form-control" id="product_url" name="product_url" value="<?php echo htmlspecialchars($product_url); ?>" placeholder="https://..."></div>
+                            <div class="mb-3"><label for="image_file" class="form-label">1. Neues Bild hochladen</label><input class="form-control" type="file" id="image_file" name="image_file" accept="image/*"></div>
+                            <div class="mb-3"><label for="image_url" class="form-label">2. ODER neue Bild-URL</label><input type="url" class="form-control" id="image_url" name="image_url" value="<?php echo $display_image_url_in_input; ?>" placeholder="https://..."></div>
+                            <div class="mb-3"><label class="form-label">3. ODER Bild einfügen (Strg+V)</label><div id="pasteArea" class="paste-area"><i class="fas fa-paste"></i> Hier klicken & einfügen</div></div>
+                            <div class="text-center mt-auto">
+                                <label class="form-label d-block">Vorschau</label>
+                                <img id="imagePreview" src="<?php echo $display_current_image_path; ?>" alt="Vorschau" class="mb-2">
+                                <?php if (!empty($article_data['image_url'])): ?>
+                                <div class="form-check"><input type="checkbox" class="form-check-input" id="deleteImageCheckbox" name="delete_image_checkbox" value="1"><label class="form-check-label text-danger" for="deleteImageCheckbox">Aktuelles Bild löschen</label></div>
+                                <?php endif; ?>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="d-flex justify-content-start align-items-center mt-4 border-top pt-4">
+                <button type="submit" class="btn btn-primary me-3"><i class="fas fa-save me-2"></i>Änderungen speichern</button>
+                <a href="articles.php" class="btn btn-secondary">Abbrechen</a>
+            </div>
+        </form>
+        <?php elseif(empty($message)): ?>
+             <div class="alert alert-warning">Artikel konnte nicht geladen werden.</div>
+        <?php endif; ?>
+    </div>
+</div>
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    function setupAddNewOption(selectId, containerId) {
+        const select = document.getElementById(selectId);
+        const container = document.getElementById(containerId);
+        if (!select || !container) return;
+        const input = container.querySelector('input');
+        function toggle() {
+            const isNew = select.value === 'new';
+            container.style.display = isNew ? 'block' : 'none';
+            if (input) input.required = isNew;
+            if (!isNew && input) { input.value = ''; }
+        }
+        select.addEventListener('change', toggle);
+        toggle();
+    }
+    setupAddNewOption('manufacturer_id', 'new_manufacturer_container');
+    setupAddNewOption('category_id', 'new_category_container');
+    const imageFileInput = document.getElementById('image_file');
+    const imageUrlInput = document.getElementById('image_url');
+    const imagePreview = document.getElementById('imagePreview');
+    const pasteArea = document.getElementById('pasteArea');
+    const pastedImageDataInput = document.getElementById('pasted_image_data');
+    const deleteCheckbox = document.getElementById('deleteImageCheckbox');
+    const originalImageSrc = imagePreview.src;
+    function clearOtherImageInputs(source) {
+        if (source !== 'file' && imageFileInput) imageFileInput.value = '';
+        if (source !== 'url' && imageUrlInput) imageUrlInput.value = '';
+        if (source !== 'paste' && pastedImageDataInput) pastedImageDataInput.value = '';
+        if (deleteCheckbox) deleteCheckbox.checked = false;
+    }
+    if(imageFileInput) {
+        imageFileInput.addEventListener('change', function() {
+            if (this.files && this.files[0]) {
+                const reader = new FileReader();
+                reader.onload = (e) => { imagePreview.src = e.target.result; };
+                reader.readAsDataURL(this.files[0]);
+                clearOtherImageInputs('file');
+            }
+        });
+    }
+    if (pasteArea) {
+        pasteArea.addEventListener('paste', function(e) {
+            e.preventDefault();
+            const items = (e.clipboardData || window.clipboardData).items;
+            for (const item of items) {
+                if (item.type.indexOf('image') === 0) {
+                    const blob = item.getAsFile();
+                    const reader = new FileReader();
+                    reader.onload = (event) => {
+                        imagePreview.src = event.target.result;
+                        pastedImageDataInput.value = event.target.result;
+                        clearOtherImageInputs('paste');
+                    };
+                    reader.readAsDataURL(blob);
+                }
+            }
+        });
+        pasteArea.addEventListener('dragover', (e) => { e.preventDefault(); pasteArea.classList.add('hover'); });
+        pasteArea.addEventListener('dragleave', () => pasteArea.classList.remove('hover'));
+        pasteArea.addEventListener('drop', (e) => { e.preventDefault(); pasteArea.classList.remove('hover'); });
+    }
+    if(deleteCheckbox) {
+        deleteCheckbox.addEventListener('change', function() {
+            if(this.checked) {
+                imagePreview.src = 'keinbild.png';
+                clearOtherImageInputs('delete');
+            } else {
+                imagePreview.src = originalImageSrc;
+            }
+        });
+    }
+    const consumableCheckbox = document.getElementById('consumable');
+    const quantityOwnedInput = document.getElementById('quantity_owned');
+    consumableCheckbox.addEventListener('change', function() {
+        if (this.checked) {
+            quantityOwnedInput.disabled = true;
+            quantityOwnedInput.value = 1;
+        } else {
+            quantityOwnedInput.disabled = false;
+        }
+    });
+});
+</script>
+<?php require_once 'footer.php'; ?>

src/edit_backpack.php

@@ -0,0 +1,249 @@
+<?php
+// edit_backpack.php - Erstellen und Bearbeiten von Rucksäcken und Fächern
+$page_title = "Rucksack bearbeiten";
+require_once 'db_connect.php';
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+$user_id = $_SESSION['user_id'];
+$backpack_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$backpack = null;
+$compartments = [];
+$message = '';
+
+// Check Household
+$household_id = null;
+$stmt_hh = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_hh->bind_param("i", $user_id);
+$stmt_hh->execute();
+$res_hh = $stmt_hh->get_result();
+if ($row = $res_hh->fetch_assoc()) {
+    $household_id = $row['household_id'];
+}
+
+// Handle Form Submission BEFORE loading header
+if ($_SERVER['REQUEST_METHOD'] == 'POST') {
+    $name = trim($_POST['name']);
+    $manufacturer = trim($_POST['manufacturer']);
+    $model = trim($_POST['model']);
+    $weight = intval($_POST['weight_grams']);
+    $volume = intval($_POST['volume_liters']);
+    $share_household = isset($_POST['share_household']) ? 1 : 0;
+    
+    $final_household_id = ($share_household && $household_id) ? $household_id : NULL;
+
+    if ($backpack_id > 0) {
+        // Update
+        $stmt = $conn->prepare("UPDATE backpacks SET name=?, manufacturer=?, model=?, weight_grams=?, volume_liters=?, household_id=? WHERE id=? AND user_id=?");
+        $stmt->bind_param("sssiisii", $name, $manufacturer, $model, $weight, $volume, $final_household_id, $backpack_id, $user_id);
+        $stmt->execute();
+    } else {
+        // Insert
+        $stmt = $conn->prepare("INSERT INTO backpacks (user_id, household_id, name, manufacturer, model, weight_grams, volume_liters) VALUES (?, ?, ?, ?, ?, ?, ?)");
+        $stmt->bind_param("iisssii", $user_id, $final_household_id, $name, $manufacturer, $model, $weight, $volume);
+        $stmt->execute();
+        $backpack_id = $stmt->insert_id;
+    }
+
+    // Handle Compartments
+    if (isset($_POST['compartment_names'])) {
+        $comp_names = $_POST['compartment_names'];
+        $comp_ids = $_POST['compartment_ids'] ?? [];
+        
+        // Get existing IDs to know what to delete
+        // We need to re-fetch existing just for this logic if not loaded yet, or just assume based on IDs
+        // Since we haven't loaded existing yet in this flow, let's just operate on IDs.
+        
+        // First load existing IDs for safety to check ownership indirectly via backpack_id
+        $existing_ids = [];
+        $stmt_check = $conn->prepare("SELECT id FROM backpack_compartments WHERE backpack_id = ?");
+        $stmt_check->bind_param("i", $backpack_id);
+        $stmt_check->execute();
+        $res_check = $stmt_check->get_result();
+        while($row = $res_check->fetch_assoc()) $existing_ids[] = $row['id'];
+        
+        $kept_ids = [];
+
+        for ($i = 0; $i < count($comp_names); $i++) {
+            $c_name = trim($comp_names[$i]);
+            $c_id = intval($comp_ids[$i] ?? 0);
+            
+            if (empty($c_name)) continue;
+
+            if ($c_id > 0 && in_array($c_id, $existing_ids)) {
+                // Update
+                $stmt_up = $conn->prepare("UPDATE backpack_compartments SET name = ?, sort_order = ? WHERE id = ?");
+                $stmt_up->bind_param("sii", $c_name, $i, $c_id);
+                $stmt_up->execute();
+                $kept_ids[] = $c_id;
+            } else {
+                // Insert
+                $stmt_in = $conn->prepare("INSERT INTO backpack_compartments (backpack_id, name, sort_order) VALUES (?, ?, ?)");
+                $stmt_in->bind_param("isi", $backpack_id, $c_name, $i);
+                $stmt_in->execute();
+            }
+        }
+
+        // Delete removed
+        foreach ($existing_ids as $ex_id) {
+            if (!in_array($ex_id, $kept_ids)) {
+                $conn->query("DELETE FROM backpack_compartments WHERE id = $ex_id");
+            }
+        }
+    }
+
+    header("Location: backpacks.php");
+    exit;
+}
+
+require_once 'header.php';
+
+// Load existing data (Moved after header inclusion is fine for display logic, but data loading could be before too)
+if ($backpack_id > 0) {
+    $stmt = $conn->prepare("SELECT * FROM backpacks WHERE id = ? AND user_id = ?");
+    $stmt->bind_param("ii", $backpack_id, $user_id);
+    $stmt->execute();
+    $result = $stmt->get_result();
+    if ($result->num_rows > 0) {
+        $backpack = $result->fetch_assoc();
+        
+        // Load Compartments
+        $stmt_c = $conn->prepare("SELECT * FROM backpack_compartments WHERE backpack_id = ? ORDER BY sort_order ASC");
+        $stmt_c->bind_param("i", $backpack_id);
+        $stmt_c->execute();
+        $res_c = $stmt_c->get_result();
+        while ($row = $res_c->fetch_assoc()) {
+            $compartments[] = $row;
+        }
+    } else {
+        $message = '<div class="alert alert-danger">Rucksack nicht gefunden oder keine Berechtigung.</div>';
+        $backpack_id = 0; // Reset to create mode
+    }
+}
+?>
+
+?>
+
+<div class="container mt-4">
+    <div class="row justify-content-center">
+        <div class="col-lg-8">
+            <div class="card">
+                <div class="card-header">
+                    <h3 class="h5 mb-0"><?php echo $backpack_id > 0 ? 'Rucksack bearbeiten' : 'Neuen Rucksack anlegen'; ?></h3>
+                </div>
+                <div class="card-body">
+                    <?php echo $message; ?>
+                    
+                    <form method="post" id="backpackForm">
+                        <div class="row g-3 mb-4">
+                            <div class="col-md-12">
+                                <label class="form-label">Bezeichnung (Spitzname)</label>
+                                <input type="text" name="name" class="form-control" required value="<?php echo htmlspecialchars($backpack['name'] ?? ''); ?>" placeholder="z.B. Mein großer Trekker">
+                            </div>
+                            <div class="col-md-6">
+                                <label class="form-label">Hersteller</label>
+                                <input type="text" name="manufacturer" class="form-control" value="<?php echo htmlspecialchars($backpack['manufacturer'] ?? ''); ?>">
+                            </div>
+                            <div class="col-md-6">
+                                <label class="form-label">Modell</label>
+                                <input type="text" name="model" class="form-control" value="<?php echo htmlspecialchars($backpack['model'] ?? ''); ?>">
+                            </div>
+                            <div class="col-md-6">
+                                <label class="form-label">Leergewicht (g)</label>
+                                <input type="number" name="weight_grams" class="form-control" value="<?php echo htmlspecialchars($backpack['weight_grams'] ?? 0); ?>">
+                            </div>
+                            <div class="col-md-6">
+                                <label class="form-label">Volumen (Liter)</label>
+                                <input type="number" name="volume_liters" class="form-control" value="<?php echo htmlspecialchars($backpack['volume_liters'] ?? 0); ?>">
+                            </div>
+                            <div class="col-md-12">
+                                <div class="form-check form-switch">
+                                    <input class="form-check-input" type="checkbox" id="share_household" name="share_household" <?php echo (!empty($backpack['household_id']) || $backpack_id == 0) ? 'checked' : ''; ?>>
+                                    <label class="form-check-label" for="share_household">Mit Haushalt teilen</label>
+                                </div>
+                            </div>
+                        </div>
+
+                        <h5 class="border-bottom pb-2 mb-3">Fächeraufteilung</h5>
+                        <div class="alert alert-light small">
+                            Definiere hier die Bereiche deines Rucksacks (z.B. Deckelfach, Bodenfach). Diese erscheinen später in der Packliste als Container.
+                        </div>
+
+                        <div id="compartments-container">
+                            <?php if (empty($compartments)): ?>
+                                <!-- Default Compartments for new backpack -->
+                                <div class="input-group mb-2 compartment-row">
+                                    <span class="input-group-text"><i class="fas fa-grip-lines text-muted"></i></span>
+                                    <input type="text" name="compartment_names[]" class="form-control" value="Hauptfach" placeholder="Fachname">
+                                    <input type="hidden" name="compartment_ids[]" value="0">
+                                    <button type="button" class="btn btn-outline-danger btn-remove-comp"><i class="fas fa-times"></i></button>
+                                </div>
+                                <div class="input-group mb-2 compartment-row">
+                                    <span class="input-group-text"><i class="fas fa-grip-lines text-muted"></i></span>
+                                    <input type="text" name="compartment_names[]" class="form-control" value="Deckelfach" placeholder="Fachname">
+                                    <input type="hidden" name="compartment_ids[]" value="0">
+                                    <button type="button" class="btn btn-outline-danger btn-remove-comp"><i class="fas fa-times"></i></button>
+                                </div>
+                            <?php else: ?>
+                                <?php foreach ($compartments as $comp): ?>
+                                    <div class="input-group mb-2 compartment-row">
+                                        <span class="input-group-text"><i class="fas fa-grip-lines text-muted"></i></span>
+                                        <input type="text" name="compartment_names[]" class="form-control" value="<?php echo htmlspecialchars($comp['name']); ?>">
+                                        <input type="hidden" name="compartment_ids[]" value="<?php echo $comp['id']; ?>">
+                                        <button type="button" class="btn btn-outline-danger btn-remove-comp"><i class="fas fa-times"></i></button>
+                                    </div>
+                                <?php endforeach; ?>
+                            <?php endif; ?>
+                        </div>
+                        
+                        <button type="button" class="btn btn-sm btn-outline-primary mb-4" id="add-compartment"><i class="fas fa-plus"></i> Fach hinzufügen</button>
+
+                        <div class="d-flex justify-content-between border-top pt-3">
+                            <a href="backpacks.php" class="btn btn-secondary">Abbrechen</a>
+                            <button type="submit" class="btn btn-primary"><i class="fas fa-save me-2"></i>Speichern</button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<script src="https://cdnjs.cloudflare.com/ajax/libs/Sortable/1.14.0/Sortable.min.js"></script>
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    const container = document.getElementById('compartments-container');
+    
+    // Sortable for Compartments
+    new Sortable(container, {
+        handle: '.input-group-text',
+        animation: 150
+    });
+
+    document.getElementById('add-compartment').addEventListener('click', function() {
+        const div = document.createElement('div');
+        div.className = 'input-group mb-2 compartment-row';
+        div.innerHTML = `
+            <span class="input-group-text"><i class="fas fa-grip-lines text-muted"></i></span>
+            <input type="text" name="compartment_names[]" class="form-control" placeholder="Fachname">
+            <input type="hidden" name="compartment_ids[]" value="0">
+            <button type="button" class="btn btn-outline-danger btn-remove-comp"><i class="fas fa-times"></i></button>
+        `;
+        container.appendChild(div);
+    });
+
+    container.addEventListener('click', function(e) {
+        if (e.target.closest('.btn-remove-comp')) {
+            e.target.closest('.compartment-row').remove();
+        }
+    });
+});
+</script>
+
+<?php require_once 'footer.php'; ?>

src/edit_packing_list_details.php

@@ -0,0 +1,232 @@
+<?php
+// edit_packing_list_details.php - Bearbeiten von Details und Rucksack-Zuweisung
+$page_title = "Packliste Details bearbeiten";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php';
+require_once 'backpack_utils.php'; // Fix: Include utils
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$packing_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$message = '';
+$packing_list = null;
+$can_edit = false;
+
+// --- 1. Permissions & Basic Data ---
+if ($packing_list_id > 0) {
+    $stmt_household_check = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+    $stmt_household_check->bind_param("i", $current_user_id);
+    $stmt_household_check->execute();
+    $current_user_household_id = $stmt_household_check->get_result()->fetch_assoc()['household_id'];
+    $stmt_household_check->close();
+
+    $stmt_list_check = $conn->prepare("SELECT id, name, description, user_id, household_id FROM packing_lists WHERE id = ?");
+    $stmt_list_check->bind_param("i", $packing_list_id);
+    $stmt_list_check->execute();
+    $result = $stmt_list_check->get_result();
+    if ($result->num_rows == 1) {
+        $packing_list = $result->fetch_assoc();
+        $is_owner = ($packing_list['user_id'] == $current_user_id);
+        $is_household_list = !empty($packing_list['household_id']);
+        $is_in_same_household = ($is_household_list && $packing_list['household_id'] == $current_user_household_id);
+
+        if ($is_owner || $is_in_same_household) {
+            $can_edit = true;
+        } else {
+            $message = '<div class="alert alert-danger">Keine Berechtigung.</div>';
+            $packing_list = null;
+        }
+    } else {
+        $message = '<div class="alert alert-warning">Packliste nicht gefunden.</div>';
+    }
+} else {
+    $message = '<div class="alert alert-danger">Keine ID.</div>';
+}
+
+// --- 2. Fetch Data for Dropdowns ---
+$available_users = [];
+if ($can_edit) {
+    // Owners: Creator + Household Members (if shared)
+    if ($packing_list['household_id']) {
+        $stmt = $conn->prepare("SELECT id, username FROM users WHERE household_id = ?");
+        $stmt->bind_param("i", $packing_list['household_id']);
+    } else {
+        $stmt = $conn->prepare("SELECT id, username FROM users WHERE id = ?");
+        $stmt->bind_param("i", $packing_list['user_id']);
+    }
+    $stmt->execute();
+    $res = $stmt->get_result();
+    while ($row = $res->fetch_assoc()) {
+        $available_users[] = $row;
+    }
+
+    // Current Assignments
+    $current_assignments = [];
+    $stmt_ca = $conn->prepare("SELECT user_id, backpack_id FROM packing_list_carriers WHERE packing_list_id = ?");
+    $stmt_ca->bind_param("i", $packing_list_id);
+    $stmt_ca->execute();
+    $res_ca = $stmt_ca->get_result();
+    while ($row = $res_ca->fetch_assoc()) {
+        $current_assignments[$row['user_id']] = $row['backpack_id'];
+    }
+}
+
+// --- 3. Handle Form Submission ---
+if ($_SERVER["REQUEST_METHOD"] == "POST" && $can_edit) {
+    // Update Basic Details
+    $name = trim($_POST['name']);
+    $description = trim($_POST['description']);
+    $stmt_update = $conn->prepare("UPDATE packing_lists SET name = ?, description = ? WHERE id = ?");
+    $stmt_update->bind_param("ssi", $name, $description, $packing_list_id);
+    $stmt_update->execute();
+    $packing_list['name'] = $name;
+    $packing_list['description'] = $description;
+
+    // Handle Backpack Assignments
+    if (isset($_POST['backpacks'])) {
+        foreach ($_POST['backpacks'] as $uid => $bid) {
+            $uid = intval($uid);
+            $bid = intval($bid);
+            $bid = ($bid > 0) ? $bid : NULL;
+
+            // Update Carrier Table
+            // Check if exists
+            $old_backpack_id = 0;
+            $stmt_chk = $conn->prepare("SELECT id, backpack_id FROM packing_list_carriers WHERE packing_list_id = ? AND user_id = ?");
+            $stmt_chk->bind_param("ii", $packing_list_id, $uid);
+            $stmt_chk->execute();
+            $res_chk = $stmt_chk->get_result();
+            if ($row_chk = $res_chk->fetch_assoc()) {
+                $old_backpack_id = $row_chk['backpack_id'];
+                $stmt_up = $conn->prepare("UPDATE packing_list_carriers SET backpack_id = ? WHERE packing_list_id = ? AND user_id = ?");
+                $stmt_up->bind_param("iii", $bid, $packing_list_id, $uid);
+                $stmt_up->execute();
+            } else {
+                $stmt_in = $conn->prepare("INSERT INTO packing_list_carriers (packing_list_id, user_id, backpack_id) VALUES (?, ?, ?)");
+                $stmt_in->bind_param("iii", $packing_list_id, $uid, $bid);
+                $stmt_in->execute();
+            }
+
+            // CLEANUP LOGIC: If backpack changed or removed
+            if ($old_backpack_id != $bid) {
+                // 1. Unparent all items that are inside the old containers (so they don't get deleted)
+                // Find all container items for this user
+                $stmt_find_containers = $conn->prepare("SELECT id FROM packing_list_items WHERE packing_list_id = ? AND carrier_user_id = ? AND (backpack_id IS NOT NULL OR backpack_compartment_id IS NOT NULL)");
+                $stmt_find_containers->bind_param("ii", $packing_list_id, $uid);
+                $stmt_find_containers->execute();
+                $res_cont = $stmt_find_containers->get_result();
+                $container_ids = [];
+                while ($r = $res_cont->fetch_assoc()) $container_ids[] = $r['id'];
+                
+                if (!empty($container_ids)) {
+                    $ids_str = implode(',', $container_ids);
+                    // Set parent to NULL for children of these containers
+                    $conn->query("UPDATE packing_list_items SET parent_packing_list_item_id = NULL WHERE packing_list_id = $packing_list_id AND parent_packing_list_item_id IN ($ids_str)");
+                    
+                    // 2. Delete the containers
+                    $conn->query("DELETE FROM packing_list_items WHERE id IN ($ids_str)");
+                }
+            }
+
+            // SYNC LOGIC (Only if new backpack assigned)
+            if ($bid && $old_backpack_id != $bid) {
+                sync_backpack_items($conn, $packing_list_id, $uid, $bid);
+            }
+        }
+    }
+    
+    $message = '<div class="alert alert-success">Änderungen gespeichert!</div>';
+    // Refresh assignments
+    $stmt_ca->execute();
+    $res_ca = $stmt_ca->get_result();
+    $current_assignments = [];
+    while ($row = $res_ca->fetch_assoc()) {
+        $current_assignments[$row['user_id']] = $row['backpack_id'];
+    }
+}
+
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0">Details: <?php echo htmlspecialchars($packing_list['name'] ?? ''); ?></h2>
+        <a href="packing_lists.php" class="btn btn-sm btn-outline-light"><i class="fas fa-arrow-left me-2"></i>Zurück</a>
+    </div>
+    <div class="card-body p-4">
+        <?php echo $message; ?>
+
+        <?php if ($packing_list): ?>
+            <form method="post">
+                <div class="row">
+                    <div class="col-md-8">
+                        <h5 class="mb-3">Basisdaten</h5>
+                        <div class="mb-3">
+                            <label class="form-label">Name</label>
+                            <input type="text" class="form-control" name="name" value="<?php echo htmlspecialchars($packing_list['name']); ?>" required>
+                        </div>
+                        <div class="mb-3">
+                            <label class="form-label">Beschreibung</label>
+                            <textarea class="form-control" name="description" rows="3"><?php echo htmlspecialchars($packing_list['description'] ?: ''); ?></textarea>
+                        </div>
+                    </div>
+                    
+                    <div class="col-md-4">
+                        <h5 class="mb-3">Rucksack-Zuweisung</h5>
+                        <div class="card bg-light border-0">
+                            <div class="card-body">
+                                <p class="small text-muted">Wähle hier, wer welchen Rucksack trägt. Bereits vergebene Rucksäcke werden ausgeblendet.</p>
+                                
+                                <?php 
+                                // Calculate used backpacks (except for the user's own current assignment)
+                                // But we iterate users. So for each user loop, we need to know what OTHERS have assigned.
+                                // Logic: Get all values from $current_assignments.
+                                $all_assigned_backpack_ids = array_values($current_assignments);
+                                
+                                foreach ($available_users as $user): 
+                                    $user_backpacks = get_available_backpacks_for_user($conn, $user['id'], $packing_list['household_id']);
+                                    $my_current_bp_id = $current_assignments[$user['id']] ?? 0;
+                                ?>
+                                    <div class="mb-3">
+                                        <label class="form-label fw-bold"><?php echo htmlspecialchars($user['username']); ?></label>
+                                        <select class="form-select form-select-sm" name="backpacks[<?php echo $user['id']; ?>]">
+                                            <option value="0">-- Kein Rucksack --</option>
+                                            <?php foreach ($user_backpacks as $bp): 
+                                                // FILTER: If backpack is used by someone else, skip it.
+                                                // "Used by someone else" means: ID is in $all_assigned_backpack_ids AND ID != $my_current_bp_id
+                                                if (in_array($bp['id'], $all_assigned_backpack_ids) && $bp['id'] != $my_current_bp_id) {
+                                                    continue;
+                                                }
+                                            ?>
+                                                <option value="<?php echo $bp['id']; ?>" <?php echo ($my_current_bp_id == $bp['id']) ? 'selected' : ''; ?>>
+                                                    <?php echo htmlspecialchars($bp['name']); ?>
+                                                </option>
+                                            <?php endforeach; ?>
+                                        </select>
+                                    </div>
+                                <?php endforeach; ?>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                
+                <hr class="my-4">
+
+                <div class="d-flex justify-content-between">
+                    <a href="manage_packing_list_items.php?id=<?php echo $packing_list_id; ?>" class="btn btn-info text-white"><i class="fas fa-boxes me-2"></i>Inhalt bearbeiten</a>
+                    <button type="submit" class="btn btn-primary"><i class="fas fa-save me-2"></i>Speichern & Synchronisieren</button>
+                </div>
+            </form>
+        <?php endif; ?>
+    </div>
+</div>
+
+<?php require_once 'footer.php'; ?>

src/footer.php

@@ -0,0 +1,51 @@
+<?php
+// footer.php - Globale Footer-Struktur
+?>
+            <footer class="main-footer">
+        &copy; <?php echo date('Y'); ?> Trekking Packliste
+    </footer>
+    </div> </div> 
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>
+
+    <script>
+        document.addEventListener('DOMContentLoaded', function() {
+            const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
+            tooltipTriggerList.map(function (tooltipTriggerEl) {
+                return new bootstrap.Tooltip(tooltipTriggerEl);
+            });
+
+            const currentPath = window.location.pathname.split('/').pop();
+            const sidebarLinks = document.querySelectorAll('.sidebar .nav-link');
+            
+            const parentMap = {
+                'add_article.php': 'articles.php', 
+                'edit_article.php': 'articles.php',
+                'add_packing_list.php': 'packing_lists.php',
+                'edit_packing_list_details.php': 'packing_lists.php',
+                'manage_packing_list_items.php': 'packing_lists.php',
+                'packing_list_detail.php': 'packing_lists.php',
+                'share_packing_list.php': 'packing_lists.php',
+                'duplicate_packing_list.php': 'packing_lists.php'
+            };
+            
+            const activePage = parentMap[currentPath] || currentPath;
+            
+            sidebarLinks.forEach(link => {
+                const linkPath = link.getAttribute('href');
+                if (linkPath === activePage) {
+                    link.classList.add('active');
+                } else {
+                    link.classList.remove('active');
+                }
+            });
+
+            var invitationModalElement = document.getElementById('invitationModal');
+            if (invitationModalElement) {
+                var invitationModal = new bootstrap.Modal(invitationModalElement);
+                invitationModal.show();
+            }
+        });
+    </script>
+</body>
+</html>

src/header.php

@@ -0,0 +1,104 @@
+<?php
+// header.php - Zentraler Header mit Einladungs-Check und dem KORREKTEN, vollständigen Menü
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+$current_username = isset($_SESSION['username']) ? $_SESSION['username'] : 'Gast';
+$pending_invitation = null;
+
+if (isset($_SESSION['user_id'])) {
+    require_once 'db_connect.php'; 
+    
+    $stmt_invite_check = $conn->prepare(
+        "SELECT hi.id, h.name AS household_name, u.username AS inviter_name 
+         FROM household_invitations hi 
+         JOIN households h ON hi.household_id = h.id 
+         JOIN users u ON hi.inviter_user_id = u.id 
+         WHERE hi.invited_user_id = ? AND hi.status = 'pending'"
+    );
+    if ($stmt_invite_check) {
+        $stmt_invite_check->bind_param("i", $_SESSION['user_id']);
+        $stmt_invite_check->execute();
+        $result = $stmt_invite_check->get_result();
+        if ($result->num_rows > 0) {
+            $pending_invitation = $result->fetch_assoc();
+        }
+        $stmt_invite_check->close();
+    }
+}
+?>
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><?php echo isset($page_title) ? htmlspecialchars($page_title) . ' - ' : ''; ?>Trekking Packliste</title>
+    
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@400;600;700&family=Poppins:wght@500;600;700&display=swap" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="assets/css/style.css?v=<?php echo time(); ?>">
+</head>
+<body>
+    <div class="page-wrapper">
+        <div class="sidebar">
+            <a class="navbar-brand" href="index.php">
+                <img src="./logo.png" alt="Logo" class="navbar-brand-logo">
+                <h4 class="mt-2">Packliste</h4>
+            </a>
+            <ul class="nav flex-column">
+                <li class="nav-item"><a class="nav-link" href="index.php"><i class="fas fa-home fa-fw"></i>Start</a></li>
+                <li class="nav-item"><a class="nav-link" href="articles.php"><i class="fas fa-box fa-fw"></i>Artikel</a></li>
+                <li class="nav-item"><a class="nav-link" href="backpacks.php"><i class="fas fa-hiking fa-fw"></i>Rucksäcke</a></li>
+                <li class="nav-item"><a class="nav-link" href="packing_lists.php"><i class="fas fa-clipboard-list fa-fw"></i>Packlisten</a></li>
+                <li class="nav-item"><a class="nav-link" href="storage_locations.php"><i class="fas fa-archive fa-fw"></i>Lagerorte</a></li>
+                <li class="nav-item"><a class="nav-link" href="categories.php"><i class="fas fa-tags fa-fw"></i>Kategorien</a></li>
+                <li class="nav-item"><a class="nav-link" href="manufacturers.php"><i class="fas fa-industry fa-fw"></i>Hersteller</a></li>
+                <li class="nav-item"><a class="nav-link" href="household.php"><i class="fas fa-users-cog fa-fw"></i>Haushalt</a></li>
+                <li class="nav-item"><a class="nav-link" href="user_profile.php"><i class="fas fa-user-cog fa-fw"></i>Profil</a></li>
+                <li class="nav-item"><a class="nav-link" href="help.php"><i class="fas fa-question-circle fa-fw"></i>Hilfe</a></li>
+            </ul>
+            <div class="username-display">
+                <div>Hallo, <strong><?php echo htmlspecialchars($current_username); ?></strong></div>
+                 <div class="mt-3">
+                    <a class="btn btn-sm btn-outline-light w-100" href="logout.php"><i class="fas fa-sign-out-alt me-2"></i>Abmelden</a>
+                </div>
+            </div>
+        </div>
+        <div class="main-content">
+
+<?php if ($pending_invitation): ?>
+    <div class="modal fade" id="invitationModal" tabindex="-1" aria-labelledby="invitationModalLabel" aria-hidden="true">
+      <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content">
+          <div class="modal-header">
+            <h5 class="modal-title" id="invitationModalLabel"><i class="fas fa-users me-2"></i>Einladung zu einem Haushalt</h5>
+            <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+          </div>
+          <div class="modal-body">
+            <p>
+                Du wurdest von <strong><?php echo htmlspecialchars($pending_invitation['inviter_name']); ?></strong> 
+                eingeladen, dem Haushalt "<strong><?php echo htmlspecialchars($pending_invitation['household_name']); ?></strong>" beizutreten.
+            </p>
+            <p>Möchtest du die Einladung annehmen?</p>
+          </div>
+          <div class="modal-footer">
+            <form action="household_actions.php" method="post" class="d-inline">
+                <input type="hidden" name="action" value="respond_invitation">
+                <input type="hidden" name="invitation_id" value="<?php echo $pending_invitation['id']; ?>">
+                <button type="submit" name="response" value="decline" class="btn btn-secondary">Ablehnen</button>
+            </form>
+            <form action="household_actions.php" method="post" class="d-inline">
+                <input type="hidden" name="action" value="respond_invitation">
+                <input type="hidden" name="invitation_id" value="<?php echo $pending_invitation['id']; ?>">
+                <button type="submit" name="response" value="accept" class="btn btn-primary">Annehmen</button>
+            </form>
+          </div>
+        </div>
+      </div>
+    </div>
+<?php endif; ?>

src/help.php

@@ -0,0 +1,188 @@
+<?php
+// help.php - Eine umfassende Anleitungs- und Hilfeseite für die Anwendung.
+
+$page_title = "Hilfe & Anleitung";
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'header.php';
+?>
+
+<style>
+    .accordion-button:not(.collapsed) {
+        color: var(--color-primary-dark);
+        background-color: #eef3eb;
+    }
+    .accordion-body ul {
+        padding-left: 20px;
+    }
+    .accordion-body li {
+        margin-bottom: 10px;
+    }
+    .card-header-topic {
+        background-color: var(--color-primary);
+        color: var(--color-text-light);
+    }
+    .topic-icon {
+        font-size: 1.5rem;
+        margin-right: 15px;
+    }
+</style>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-question-circle me-2"></i>Anleitung & Hilfe</h2>
+    </div>
+    <div class="card-body p-4">
+        <p class="lead">
+            Willkommen bei deiner Trekking-Packlisten-Anwendung! Diese Seite hilft dir, alle Funktionen zu verstehen und das Beste aus dem Tool herauszuholen.
+        </p>
+        <hr class="my-4">
+
+        <div class="card mb-4">
+            <div class="card-header card-header-topic d-flex align-items-center">
+                <i class="fas fa-box-open topic-icon"></i>
+                <h5 class="mb-0">1. Grundlagen: Dein Inventar verwalten</h5>
+            </div>
+            <div class="card-body">
+                <p>Das Herzstück der Anwendung sind deine <strong>Artikel</strong>. Dies ist deine persönliche Datenbank aller Ausrüstungsgegenstände. Je genauer du sie pflegst, desto präziser werden deine Packlisten.</p>
+                <div class="accordion" id="accordionInventory">
+                    
+                    <div class="accordion-item">
+                        <h2 class="accordion-header" id="headingOne">
+                            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="false" aria-controls="collapseOne">
+                                <strong>Artikel anlegen und bearbeiten</strong>
+                            </button>
+                        </h2>
+                        <div id="collapseOne" class="accordion-collapse collapse" aria-labelledby="headingOne" data-bs-parent="#accordionInventory">
+                            <div class="accordion-body">
+                                <ul>
+                                    <li><strong>Artikel anlegen:</strong> Gehe im Menü auf "Artikel" und klicke auf "Neuen Artikel hinzufügen". Fülle die Felder so detailliert wie möglich aus.</li>
+                                    <li><strong>Stammdaten:</strong> Gib den Namen, Hersteller und das genaue Modell an. Je spezifischer, desto besser.</li>
+                                    <li><strong>Gewicht:</strong> Das Gewicht in Gramm ist das wichtigste Feld für die spätere Analyse deiner Packliste.</li>
+                                    <li><strong>Komponenten:</strong> Ein grosser Vorteil! Du kannst Artikel als "Komponente" eines anderen Artikels definieren. Beispiel: Heringe sind eine Komponente des Zelts. So baust du logische Sets.</li>
+                                    <li><strong>Eigenschaften:</strong>
+                                        <ul>
+                                            <li><strong>Anzahl im Besitz:</strong> Wie oft besitzt du diesen Artikel? (z.B. 4x Wander-Socken).</li>
+                                            <li><strong>Verbrauchsartikel:</strong> Hake diese Box an für Dinge wie Gaskartuschen oder Müsliriegel. Sie werden anders im Gesamtgewicht berechnet.</li>
+                                            <li><strong>Für den Haushalt freigeben:</strong> Wenn du in einem Haushalt bist, kannst du diesen Artikel für alle Mitglieder sichtbar und nutzbar machen. Ideal für Zelte, Kocher etc.</li>
+                                        </ul>
+                                    </li>
+                                     <li><strong>Bild & Produktseite:</strong> Ein Bild hilft bei der visuellen Erkennung. Ein Link zur Produktseite kann nützlich sein, um Details nachzuschlagen.</li>
+                                </ul>
+                            </div>
+                        </div>
+                    </div>
+
+                    <div class="accordion-item">
+                        <h2 class="accordion-header" id="headingTwo">
+                            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
+                                <strong>Kategorien, Hersteller & Lagerorte</strong>
+                            </button>
+                        </h2>
+                        <div id="collapseTwo" class="accordion-collapse collapse" aria-labelledby="headingTwo" data-bs-parent="#accordionInventory">
+                            <div class="accordion-body">
+                                Um dein Inventar übersichtlich zu halten, kannst du unter den entsprechenden Menüpunkten eigene Organisations-Strukturen anlegen:
+                                <ul>
+                                    <li><strong>Kategorien:</strong> Definiere eigene Kategorien wie "Küche", "Schlafen", "Kleidung". Dies hilft beim Filtern und bei der Analyse der Packliste.</li>
+                                    <li><strong>Hersteller:</strong> Lege die Hersteller deiner Ausrüstung an, um sie schnell wiederzufinden.</li>
+                                    <li><strong>Lagerorte:</strong> Wo bewahrst du deine Ausrüstung auf? Definiere hier eine zweistufige Hierarchie (z.B. Ebene 1: "Keller", Ebene 2: "Regal 3, Box B"), um nie wieder etwas suchen zu müssen.</li>
+                                </ul>
+                            </div>
+                        </div>
+                    </div>
+
+                </div>
+            </div>
+        </div>
+
+        <div class="card mb-4">
+            <div class="card-header card-header-topic d-flex align-items-center">
+                 <i class="fas fa-clipboard-list topic-icon"></i>
+                <h5 class="mb-0">2. Packlisten erstellen und nutzen</h5>
+            </div>
+            <div class="card-body">
+                 <p>Sobald dein Inventar gepflegt ist, kannst du mit dem Packen beginnen.</p>
+                 <div class="accordion" id="accordionPacking">
+
+                    <div class="accordion-item">
+                        <h2 class="accordion-header" id="headingThree">
+                            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
+                                <strong>Die interaktive Pack-Ansicht (manage_packing_list_items.php)</strong>
+                            </button>
+                        </h2>
+                        <div id="collapseThree" class="accordion-collapse collapse" aria-labelledby="headingThree" data-bs-parent="#accordionPacking">
+                            <div class="accordion-body">
+                                Dies ist die zentrale Seite zur Zusammenstellung deiner Liste.
+                                <ul>
+                                    <li><strong>Artikel hinzufügen:</strong> Ziehe einfach einen Artikel aus der linken Spalte ("Verfügbare Artikel") in eine der Träger-Boxen auf der rechten Seite.</li>
+                                    <li><strong>Position ändern:</strong> Du kannst die Artikel jederzeit per Drag-and-Drop neu anordnen, sowohl innerhalb einer Träger-Box als auch zwischen verschiedenen Trägern.</li>
+                                    <li><strong>Ebenen erstellen (Verschachteln):</strong> Klicke auf den <strong>Pfeil nach rechts</strong> bei einem Artikel, um ihn eine Ebene tiefer zu setzen. So wird er zum Kind-Element des Artikels direkt darüber. Das ist perfekt für Sets (z.B. "Kochset" mit Topf, Löffel, Brenner als Kinder). Mit dem <strong>Pfeil nach links</strong> hebst du die Verschachtelung wieder auf. Du kannst mehrere Ebenen tief verschachteln.</li>
+                                    <li><strong>Menge anpassen:</strong> Ändere die Zahl im Eingabefeld, um die Menge eines Artikels für diese spezifische Packliste anzupassen.</li>
+                                    <li><strong>Komponenten-Abfrage:</strong> Wenn du einen Artikel hinzufügst, der in deinem Inventar als Set mit Komponenten definiert ist, fragt dich das System, ob du die zugehörigen Komponenten ebenfalls hinzufügen möchtest.</li>
+                                    <li><strong>Träger (Carriers):</strong> Standardmässig bist du der einzige Träger. In einem Haushalt erscheinen hier alle Mitglieder. Du kannst die Ausrüstung per Drag-and-Drop auf verschiedene Personen verteilen, um das Gewicht fair aufzuteilen.</li>
+                                </ul>
+                            </div>
+                        </div>
+                    </div>
+
+                     <div class="accordion-item">
+                        <h2 class="accordion-header" id="headingFour">
+                            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseFour" aria-expanded="false" aria-controls="collapseFour">
+                                <strong>Packliste ansehen und analysieren</strong>
+                            </button>
+                        </h2>
+                        <div id="collapseFour" class="accordion-collapse collapse" aria-labelledby="headingFour" data-bs-parent="#accordionPacking">
+                            <div class="accordion-body">
+                                Die Detailansicht einer Packliste gibt dir eine perfekte Übersicht:
+                                <ul>
+                                    <li><strong>Statistiken:</strong> Auf der rechten Seite siehst du das Gesamtgewicht, aufgeteilt nach Trägern und Kategorien. So erkennst du sofort, wo das meiste Gewicht herkommt.</li>
+                                    <li><strong>Basisgewicht:</strong> Das System berechnet automatisch dein Basisgewicht (ohne Verbrauchsartikel), eine wichtige Kennzahl für jeden Wanderer.</li>
+                                    <li><strong>Druckansicht:</strong> Über den "Drucken"-Button kannst du eine saubere, minimalistische Checkliste für deine Tour ausdrucken.</li>
+                                </ul>
+                            </div>
+                        </div>
+                    </div>
+
+                 </div>
+            </div>
+        </div>
+
+        <div class="card mb-4">
+            <div class="card-header card-header-topic d-flex align-items-center">
+                 <i class="fas fa-users topic-icon"></i>
+                <h5 class="mb-0">3. Zusammenarbeit im Haushalt & Teilen</h5>
+            </div>
+            <div class="card-body">
+                 <p>Teile deine Ausrüstung und Pläne mit anderen.</p>
+                 <div class="accordion" id="accordionSharing">
+                    <div class="accordion-item">
+                        <h2 class="accordion-header" id="headingFive">
+                            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseFive" aria-expanded="false" aria-controls="collapseFive">
+                                <strong>Das Haushalts-System</strong>
+                            </button>
+                        </h2>
+                        <div id="collapseFive" class="accordion-collapse collapse" aria-labelledby="headingFive" data-bs-parent="#accordionSharing">
+                            <div class="accordion-body">
+                                <ul>
+                                    <li><strong>Erstellen & Beitreten:</strong> Unter "Haushalt" kannst du einen neuen Haushalt gründen oder eine Einladung annehmen. Du kannst nur in einem Haushalt gleichzeitig sein.</li>
+                                    <li><strong>Geteilte Ressourcen:</strong> Artikel und Packlisten, die für den Haushalt freigegeben sind, können von allen Mitgliedern gesehen und verwendet werden.</li>
+                                    <li><strong>Admin-Rolle:</strong> Der Gründer eines Haushalts ist der Administrator und kann neue Mitglieder per Benutzername einladen.</li>
+                                     <li><strong>Aktivitäten-Log:</strong> Auf der Haushalts-Seite siehst du einen Verlauf der letzten Aktivitäten, z.B. wer einen neuen Artikel hinzugefügt oder eine Liste bearbeitet hat.</li>
+                                </ul>
+                            </div>
+                        </div>
+                    </div>
+                 </div>
+            </div>
+        </div>
+
+    </div>
+</div>
+
+<?php require_once 'footer.php'; ?>

src/household.php

@@ -0,0 +1,158 @@
+<?php
+// household.php - Zentrale Seite für die Haushaltsübersicht und -verwaltung
+
+$page_title = "Mein Haushalt";
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+if (isset($_SESSION['message'])) {
+    $message = '<div class="alert alert-'.$_SESSION['message_type'].'" role="alert">'.htmlspecialchars($_SESSION['message']).'</div>';
+    unset($_SESSION['message']);
+    unset($_SESSION['message_type']);
+}
+
+// Lade Haushalts-Informationen
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_data = null;
+$household_members_stats = [];
+$household_logs = [];
+$is_admin = false;
+
+if ($household_id) {
+    // Haushaltsdetails laden
+    $stmt_details = $conn->prepare("SELECT * FROM households WHERE id = ?");
+    $stmt_details->bind_param("i", $household_id);
+    $stmt_details->execute();
+    $household_data = $stmt_details->get_result()->fetch_assoc();
+    $is_admin = ($household_data && $household_data['admin_user_id'] == $current_user_id);
+    $stmt_details->close();
+
+    // Mitglieder und deren Statistiken laden
+    $stmt_members = $conn->prepare("
+        SELECT 
+            u.id, u.username,
+            (SELECT COUNT(*) FROM articles WHERE user_id = u.id) as article_count,
+            (SELECT COUNT(*) FROM packing_lists WHERE user_id = u.id) as list_count
+        FROM users u 
+        WHERE u.household_id = ?
+        ORDER BY u.username
+    ");
+    $stmt_members->bind_param("i", $household_id);
+    $stmt_members->execute();
+    $household_members_stats = $stmt_members->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_members->close();
+    
+    // Eingeladene Mitglieder laden
+    $stmt_pending = $conn->prepare("SELECT u.username FROM household_invitations hi JOIN users u ON hi.invited_user_id = u.id WHERE hi.household_id = ? AND hi.status = 'pending'");
+    $stmt_pending->bind_param("i", $household_id);
+    $stmt_pending->execute();
+    $pending_invitations = $stmt_pending->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_pending->close();
+
+
+    // Haushalts-Log laden
+    $stmt_logs = $conn->prepare("SELECT message, created_at FROM household_logs WHERE household_id = ? ORDER BY created_at DESC LIMIT 20");
+    $stmt_logs->bind_param("i", $household_id);
+    $stmt_logs->execute();
+    $household_logs = $stmt_logs->get_result()->fetch_all(MYSQLI_ASSOC);
+    $stmt_logs->close();
+}
+
+$conn->close();
+?>
+
+<div class="row g-4">
+    <div class="col-lg-5">
+        <div class="card">
+            <div class="card-header"><h2 class="h4 mb-0"><i class="fas fa-home me-2"></i>Mein Haushalt</h2></div>
+            <div class="card-body p-4">
+                <?php if(!empty($message)) echo $message; ?>
+
+                <?php if (!$household_id): ?>
+                    <p>Du bist derzeit in keinem Haushalt. Erstelle einen neuen Haushalt, um Packlisten und Artikel mit anderen zu teilen.</p>
+                    <form action="household_actions.php" method="post">
+                        <input type="hidden" name="action" value="create_household">
+                        <div class="row g-3 align-items-end">
+                            <div class="col-sm-8"><label for="household_name" class="form-label">Name deines Haushalts</label><input type="text" class="form-control" name="household_name" id="household_name" placeholder="z.B. Familie Mustermann" required></div>
+                            <div class="col-sm-4"><button type="submit" class="btn btn-primary w-100">Erstellen</button></div>
+                        </div>
+                    </form>
+                <?php else: ?>
+                    <h4><?php echo htmlspecialchars($household_data['name']); ?></h4>
+                    <?php if ($is_admin) echo '<span class="badge bg-success mb-3">Du bist Administrator dieses Haushalts</span>'; ?>
+
+                    <h5 class="mt-4">Mitglieder</h5>
+                    <ul class="list-group">
+                        <?php foreach ($household_members_stats as $member): ?>
+                            <li class="list-group-item d-flex justify-content-between align-items-center">
+                                <span><i class="fas fa-user me-2"></i><?php echo htmlspecialchars($member['username']); ?></span>
+                                <div>
+                                    <span class="badge bg-secondary rounded-pill" data-bs-toggle="tooltip" title="Erstellte Artikel"><i class="fas fa-box fa-xs me-1"></i> <?php echo $member['article_count']; ?></span>
+                                    <span class="badge bg-secondary rounded-pill" data-bs-toggle="tooltip" title="Erstellte Packlisten"><i class="fas fa-clipboard-list fa-xs me-1"></i> <?php echo $member['list_count']; ?></span>
+                                </div>
+                            </li>
+                        <?php endforeach; ?>
+                        <?php foreach ($pending_invitations as $pending): ?>
+                             <li class="list-group-item d-flex justify-content-between align-items-center">
+                                <span><i class="fas fa-user-clock me-2 text-muted"></i><?php echo htmlspecialchars($pending['username']); ?></span>
+                                <span class="badge bg-warning text-dark rounded-pill">Eingeladen</span>
+                            </li>
+                        <?php endforeach; ?>
+                    </ul>
+
+                    <?php if ($is_admin): ?>
+                        <hr class="my-4">
+                        <h5>Neues Mitglied einladen</h5>
+                        <form action="household_actions.php" method="post">
+                            <input type="hidden" name="action" value="invite_member">
+                            <div class="row g-3 align-items-end">
+                                <div class="col-sm-8"><label for="username" class="form-label">Benutzername des Mitglieds</label><input type="text" class="form-control" id="username" name="username" required></div>
+                                <div class="col-sm-4"><button type="submit" class="btn btn-primary w-100"><i class="fas fa-paper-plane me-2"></i>Einladen</button></div>
+                            </div>
+                        </form>
+                    <?php endif; ?>
+                <?php endif; ?>
+            </div>
+        </div>
+    </div>
+    
+    <div class="col-lg-7">
+        <div class="card h-100">
+            <div class="card-header"><h2 class="h4 mb-0"><i class="fas fa-stream me-2"></i>Aktivitäten im Haushalt</h2></div>
+            <div class="card-body p-2">
+                <?php if (empty($household_logs)): ?>
+                    <div class="p-4 text-center text-muted">Noch keine Aktivitäten vorhanden.</div>
+                <?php else: ?>
+                    <ul class="list-group list-group-flush">
+                        <?php foreach ($household_logs as $log): ?>
+                            <li class="list-group-item">
+                                <div class="d-flex w-100 justify-content-between">
+                                    <p class="mb-1"><?php echo htmlspecialchars($log['message']); ?></p>
+                                    <small class="text-muted"><?php echo date('d.m.Y H:i', strtotime($log['created_at'])); ?></small>
+                                </div>
+                            </li>
+                        <?php endforeach; ?>
+                    </ul>
+                <?php endif; ?>
+            </div>
+        </div>
+    </div>
+</div>
+
+<?php require_once 'footer.php'; ?>

src/household_actions.php

@@ -0,0 +1,143 @@
+<?php
+// household_actions.php - Serverseitige Logik für alle Haushalts-Aktionen
+// KORREKTUR: Leitet jetzt zur household.php weiter
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+function log_household_action($conn, $household_id, $user_id, $message) {
+    if (empty($household_id)) return;
+    $stmt = $conn->prepare("INSERT INTO household_logs (household_id, user_id, message) VALUES (?, ?, ?)");
+    $stmt->bind_param("iis", $household_id, $user_id, $message);
+    $stmt->execute();
+    $stmt->close();
+}
+
+if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST['action'])) {
+    $action = $_POST['action'];
+    $current_username = $_SESSION['username'];
+
+    $conn->begin_transaction();
+    try {
+        switch ($action) {
+            case 'create_household':
+                $household_name = trim($_POST['household_name']);
+                if (empty($household_name)) throw new Exception("Der Haushaltsname darf nicht leer sein.");
+
+                $stmt_check = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+                $stmt_check->bind_param("i", $current_user_id);
+                $stmt_check->execute();
+                $user_data = $stmt_check->get_result()->fetch_assoc();
+                if (!empty($user_data['household_id'])) throw new Exception("Du bist bereits Mitglied in einem Haushalt.");
+                $stmt_check->close();
+
+                $stmt_create = $conn->prepare("INSERT INTO households (name, admin_user_id) VALUES (?, ?)");
+                $stmt_create->bind_param("si", $household_name, $current_user_id);
+                $stmt_create->execute();
+                $new_household_id = $conn->insert_id;
+                $stmt_create->close();
+
+                $stmt_update_user = $conn->prepare("UPDATE users SET household_id = ? WHERE id = ?");
+                $stmt_update_user->bind_param("ii", $new_household_id, $current_user_id);
+                $stmt_update_user->execute();
+                $stmt_update_user->close();
+
+                $log_message = htmlspecialchars($current_username) . " hat den Haushalt '" . htmlspecialchars($household_name) . "' erstellt.";
+                log_household_action($conn, $new_household_id, $current_user_id, $log_message);
+
+                $message = "Haushalt erfolgreich erstellt!";
+                $_SESSION['message_type'] = 'success';
+                break;
+
+            case 'invite_member':
+                $invited_username = trim($_POST['username']);
+                if (empty($invited_username)) throw new Exception("Der Benutzername darf nicht leer sein.");
+
+                $stmt_find = $conn->prepare("SELECT id, household_id FROM users WHERE username = ?");
+                $stmt_find->bind_param("s", $invited_username);
+                $stmt_find->execute();
+                $invited_user = $stmt_find->get_result()->fetch_assoc();
+                $stmt_find->close();
+
+                if (!$invited_user) throw new Exception("Benutzer '" . htmlspecialchars($invited_username) . "' nicht gefunden.");
+                if ($invited_user['id'] == $current_user_id) throw new Exception("Du kannst dich nicht selbst einladen.");
+                if (!empty($invited_user['household_id'])) throw new Exception("Dieser Benutzer ist bereits in einem anderen Haushalt.");
+                
+                $stmt_household = $conn->prepare("SELECT id FROM households WHERE admin_user_id = ?");
+                $stmt_household->bind_param("i", $current_user_id);
+                $stmt_household->execute();
+                $household = $stmt_household->get_result()->fetch_assoc();
+                if (!$household) throw new Exception("Nur der Admin kann Mitglieder einladen.");
+                $stmt_household->close();
+                
+                $stmt_invite = $conn->prepare("INSERT INTO household_invitations (household_id, inviter_user_id, invited_user_id) VALUES (?, ?, ?)");
+                $stmt_invite->bind_param("iii", $household['id'], $current_user_id, $invited_user['id']);
+                $stmt_invite->execute();
+                $stmt_invite->close();
+
+                $log_message = htmlspecialchars($current_username) . " hat " . htmlspecialchars($invited_username) . " in den Haushalt eingeladen.";
+                log_household_action($conn, $household['id'], $current_user_id, $log_message);
+
+                $message = "Einladung an " . htmlspecialchars($invited_username) . " wurde versendet.";
+                $_SESSION['message_type'] = 'success';
+                break;
+            
+            case 'respond_invitation':
+                $invitation_id = intval($_POST['invitation_id']);
+                $response = $_POST['response'];
+                if (!in_array($response, ['accept', 'decline'])) throw new Exception("Ungültige Antwort.");
+                
+                $stmt_get_invite = $conn->prepare("SELECT id, household_id, status FROM household_invitations WHERE id = ? AND invited_user_id = ?");
+                $stmt_get_invite->bind_param("ii", $invitation_id, $current_user_id);
+                $stmt_get_invite->execute();
+                $invite = $stmt_get_invite->get_result()->fetch_assoc();
+                $stmt_get_invite->close();
+                if (!$invite || $invite['status'] !== 'pending') throw new Exception("Einladung ist ungültig oder wurde bereits beantwortet.");
+
+                if ($response === 'accept') {
+                    $stmt_accept = $conn->prepare("UPDATE users SET household_id = ? WHERE id = ?");
+                    $stmt_accept->bind_param("ii", $invite['household_id'], $current_user_id);
+                    $stmt_accept->execute();
+                    $stmt_accept->close();
+
+                    $stmt_update_invite = $conn->prepare("UPDATE household_invitations SET status = 'accepted', responded_at = NOW() WHERE id = ?");
+                    $stmt_update_invite->bind_param("i", $invitation_id);
+                    $stmt_update_invite->execute();
+                    $stmt_update_invite->close();
+                    
+                    $log_message = htmlspecialchars($current_username) . " ist dem Haushalt beigetreten.";
+                    log_household_action($conn, $invite['household_id'], $current_user_id, $log_message);
+                    
+                    $message = "Du bist dem Haushalt beigetreten!";
+                    $_SESSION['message_type'] = 'success';
+                } else {
+                    $stmt_update_invite = $conn->prepare("UPDATE household_invitations SET status = 'declined', responded_at = NOW() WHERE id = ?");
+                    $stmt_update_invite->bind_param("i", $invitation_id);
+                    $stmt_update_invite->execute();
+                    $stmt_update_invite->close();
+                    $message = "Du hast die Einladung abgelehnt.";
+                    $_SESSION['message_type'] = 'info';
+                }
+                break;
+        }
+        $conn->commit();
+    } catch (Exception $e) {
+        $conn->rollback();
+        $message = $e->getMessage();
+        $_SESSION['message_type'] = 'danger';
+    }
+
+    $_SESSION['message'] = $message;
+    header("Location: household.php");
+    exit;
+}
+?>

src/index.php

@@ -0,0 +1,223 @@
+<?php
+// index.php - Startseite der Trekking Packlisten Anwendung
+// KORREKTUR: Farbpalette für die Diagramme für bessere Lesbarkeit überarbeitet.
+
+$page_title = "Dashboard";
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$current_username = $_SESSION['username'];
+
+// --- Lade Haushalts-Informationen ---
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$current_user_household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($current_user_household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $current_user_household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) {
+            $household_member_ids[] = $row['id'];
+        }
+    }
+    $stmt_members->close();
+}
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+
+
+// --- Daten für die Statistik-Boxen laden ---
+$articles_by_category = [];
+$sql_articles_by_category = "SELECT c.name AS category_name, COUNT(a.id) AS article_count FROM articles a LEFT JOIN categories c ON a.category_id = c.id WHERE a.user_id IN ($placeholders) OR a.household_id = ? GROUP BY c.name ORDER BY article_count DESC";
+$stmt_articles_by_category = $conn->prepare($sql_articles_by_category);
+if ($stmt_articles_by_category) {
+    $all_params = array_merge($household_member_ids, [$current_user_household_id]);
+    $all_types = $types . 'i';
+    $stmt_articles_by_category->bind_param($all_types, ...$all_params);
+    $stmt_articles_by_category->execute();
+    $result_articles_by_category = $stmt_articles_by_category->get_result();
+    while ($row = $result_articles_by_category->fetch_assoc()) {
+        $articles_by_category[] = [
+            'category_name' => $row['category_name'] ?: 'Ohne Kategorie',
+            'article_count' => $row['article_count']
+        ];
+    }
+    $stmt_articles_by_category->close();
+}
+
+$packing_lists_stats = [];
+$sql_lists = "SELECT pl.id, pl.name, SUM(pli.quantity * a.weight_grams) AS total_weight FROM packing_lists pl LEFT JOIN packing_list_items pli ON pl.id = pli.packing_list_id LEFT JOIN articles a ON pli.article_id = a.id WHERE pl.user_id IN ($placeholders) OR pl.household_id = ? GROUP BY pl.id, pl.name ORDER BY total_weight DESC";
+$stmt_lists = $conn->prepare($sql_lists);
+if ($stmt_lists) {
+    $all_params = array_merge($household_member_ids, [$current_user_household_id]);
+    $all_types = $types . 'i';
+    $stmt_lists->bind_param($all_types, ...$all_params);
+    $stmt_lists->execute();
+    $result_lists = $stmt_lists->get_result();
+    while ($row = $result_lists->fetch_assoc()) {
+        $packing_lists_stats[] = [
+            'packing_list_id' => $row['id'],
+            'packing_list_name' => htmlspecialchars($row['name']),
+            'total_weight_grams' => $row['total_weight'] ?: 0
+        ];
+    }
+    $stmt_lists->close();
+}
+$conn->close();
+
+// Daten für die Diagramme vorbereiten
+$category_chart_labels = json_encode(array_column($articles_by_category, 'category_name'));
+$category_chart_data = json_encode(array_column($articles_by_category, 'article_count'));
+
+$list_chart_labels = json_encode(array_column($packing_lists_stats, 'packing_list_name'));
+$list_chart_data = json_encode(array_column($packing_lists_stats, 'total_weight_grams'));
+
+$quotes = ["Nur wo du zu Fuß warst, bist du auch wirklich gewesen.", "Der Weg ist das Ziel.", "Abenteuer beginnen, wo Pläne enden."];
+$random_quote = $quotes[array_rand($quotes)];
+?>
+
+<div class="card p-4 border-0 shadow-sm">
+    <div class="welcome-section">
+        <h1>Willkommen zurück, <strong><?php echo htmlspecialchars($current_username); ?></strong>!</h1>
+        <p class="lead">Organisiere deine Ausrüstung und bereite dich optimal auf dein nächstes Abenteuer vor.</p>
+        
+        <div class="welcome-image-container">
+            <div class="animated-bg"></div>
+        </div>
+        <p class="text-muted fst-italic mt-4">"<?php echo $random_quote; ?>"</p>
+    </div>
+
+    <hr class="my-5" style="opacity: 0.1;">
+
+    <div class="row g-4">
+        <div class="col-lg-6">
+            <div class="card h-100">
+                <div class="card-header"><h3 class="h5 mb-0"><i class="fas fa-chart-pie me-2"></i>Artikelverteilung im Haushalt</h3></div>
+                <div class="card-body d-flex align-items-center justify-content-center">
+                    <?php if (empty($articles_by_category)): ?>
+                        <p class="text-center text-muted p-4">Füge Artikel hinzu, um hier eine Übersicht zu sehen.</p>
+                    <?php else: ?>
+                        <div class="chart-container w-100">
+                            <canvas id="categoryChart"></canvas>
+                        </div>
+                    <?php endif; ?>
+                </div>
+            </div>
+        </div>
+
+        <div class="col-lg-6">
+            <div class="card h-100">
+                <div class="card-header"><h3 class="h5 mb-0"><i class="fas fa-chart-bar me-2"></i>Gewicht pro Packliste im Haushalt (g)</h3></div>
+                <div class="card-body d-flex align-items-center justify-content-center">
+                    <?php if (empty($packing_lists_stats)): ?>
+                        <p class="text-center text-muted p-4">Erstelle eine Packliste, um hier eine Analyse zu sehen.</p>
+                    <?php else: ?>
+                        <div class="chart-container w-100">
+                             <canvas id="listWeightChart"></canvas>
+                        </div>
+                    <?php endif; ?>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+<script>
+document.addEventListener('DOMContentLoaded', function () {
+    // KORREKTUR: Neue, kontrastreichere Farbpalette
+    const chartColors = [
+        '#4CAF50', '#2196F3', '#FFC107', '#E91E63', '#9C27B0',
+        '#00BCD4', '#FF5722', '#795548', '#607D8B', '#F44336'
+    ];
+
+    const categoryCtx = document.getElementById('categoryChart');
+    if (categoryCtx && <?php echo $category_chart_data; ?>.length > 0) {
+        new Chart(categoryCtx, {
+            type: 'doughnut',
+            data: {
+                labels: <?php echo $category_chart_labels; ?>,
+                datasets: [{
+                    label: 'Anzahl Artikel',
+                    data: <?php echo $category_chart_data; ?>,
+                    backgroundColor: chartColors,
+                    hoverOffset: 4,
+                    borderWidth: 0
+                }]
+            },
+            options: {
+                responsive: true,
+                maintainAspectRatio: false,
+                plugins: {
+                    legend: {
+                        position: 'bottom',
+                        labels: {
+                            usePointStyle: true,
+                            padding: 20
+                        }
+                    }
+                },
+                cutout: '70%'
+            }
+        });
+    }
+
+    const listWeightCtx = document.getElementById('listWeightChart');
+    if (listWeightCtx && <?php echo $list_chart_data; ?>.length > 0) {
+        new Chart(listWeightCtx, {
+            type: 'bar',
+            data: {
+                labels: <?php echo $list_chart_labels; ?>,
+                datasets: [{
+                    label: 'Gesamtgewicht in Gramm',
+                    data: <?php echo $list_chart_data; ?>,
+                    backgroundColor: 'rgba(107, 142, 35, 0.8)', // Using primary light color
+                    borderColor: 'rgba(59, 74, 35, 1)',
+                    borderWidth: 1,
+                    borderRadius: 4
+                }]
+            },
+            options: {
+                indexAxis: 'y',
+                responsive: true,
+                maintainAspectRatio: false,
+                scales: {
+                    x: {
+                        beginAtZero: true,
+                        grid: {
+                            display: false
+                        }
+                    },
+                    y: {
+                         grid: {
+                            color: 'rgba(0,0,0,0.05)'
+                        }
+                    }
+                },
+                plugins: {
+                    legend: {
+                        display: false
+                    }
+                }
+            }
+        });
+    }
+});
+</script>
+
+<?php require_once 'footer.php'; ?>

src/login.php

@@ -0,0 +1,101 @@
+<?php
+// login.php - Seite zur Benutzeranmeldung
+// KORREKTUR: Design an das der Registrierungsseite angepasst.
+
+$page_title = "Anmeldung";
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+if (isset($_SESSION['user_id'])) {
+    header("Location: index.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+$message = '';
+
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $username = trim($_POST['username']);
+    $password = trim($_POST['password']);
+
+    if (empty($username) || empty($password)) {
+        $message = '<div class="alert alert-danger" role="alert">Bitte füllen Sie beide Felder aus.</div>';
+    } else {
+        $stmt = $conn->prepare("SELECT id, username, password FROM users WHERE username = ?");
+        $stmt->bind_param("s", $username);
+        $stmt->execute();
+        $result = $stmt->get_result();
+
+        if ($result->num_rows == 1) {
+            $user = $result->fetch_assoc();
+            
+            if (password_verify($password, $user['password'])) {
+                $_SESSION['user_id'] = $user['id'];
+                $_SESSION['username'] = $user['username'];
+
+                $stmt_settings = $conn->prepare("SELECT setting_key, setting_value FROM user_settings WHERE user_id = ?");
+                $stmt_settings->bind_param("i", $user['id']);
+                $stmt_settings->execute();
+                $result_settings = $stmt_settings->get_result();
+                
+                while ($setting = $result_settings->fetch_assoc()) {
+                    $_SESSION[$setting['setting_key']] = $setting['setting_value'];
+                }
+                $stmt_settings->close();
+
+                header("Location: index.php");
+                exit;
+            } else {
+                $message = '<div class="alert alert-danger" role="alert">Ungültiger Benutzername oder Passwort.</div>';
+            }
+        } else {
+            $message = '<div class="alert alert-danger" role="alert">Ungültiger Benutzername oder Passwort.</div>';
+        }
+        $stmt->close();
+    }
+}
+$conn->close();
+?>
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Anmeldung - Trekking Packliste</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@400;600;700&display=swap" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="assets/css/style.css">
+</head>
+<body>
+    <div class="auth-wrapper">
+        <div class="auth-container">
+            <div class="auth-header">
+                <img src="./logo.png" alt="Trekking Packliste Logo" class="auth-logo">
+                <h2>Anmeldung</h2>
+            </div>
+            <div class="auth-body">
+                <?php if(!empty($message)) echo $message; ?>
+                <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
+                    <div class="mb-3">
+                        <label for="username" class="form-label">Benutzername</label>
+                        <input type="text" class="form-control" id="username" name="username" required>
+                    </div>
+                    <div class="mb-3">
+                        <label for="password" class="form-label">Passwort</label>
+                        <input type="password" class="form-control" id="password" name="password" required>
+                    </div>
+                    <button type="submit" class="btn btn-primary w-100 mt-3">Anmelden</button>
+                </form>
+                <div class="text-center mt-4">
+                    <span class="text-muted">Noch nicht registriert?</span> <a href="register.php" class="fw-bold text-decoration-none" style="color: var(--color-primary);">Jetzt registrieren</a>
+                </div>
+            </div>
+        </div>
+    </div>
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>
+</body>
+</html>

src/logout.php

@@ -0,0 +1,29 @@
+<?php
+// logout.php - Skript zur Abmeldung
+
+// Session starten
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+// Alle Session-Variablen löschen
+$_SESSION = array();
+
+// Wenn die Session über Cookies verwaltet wird, lösche auch den Session-Cookie
+// Beachte: Dies löscht nicht die Session-Datei auf dem Server
+// sondern nur den Cookie auf der Clientseite.
+if (ini_get("session.use_cookies")) {
+    $params = session_get_cookie_params();
+    setcookie(session_name(), '', time() - 42000,
+        $params["path"], $params["domain"],
+        $params["secure"], $params["httponly"]
+    );
+}
+
+// Die Session zerstören
+session_destroy();
+
+// Zur Login-Seite umleiten
+header("Location: login.php");
+exit;
+?>

src/manage_packing_list_items.php

@@ -0,0 +1,557 @@
+<?php
+// manage_packing_list_items.php - Interaktive Verwaltung der Packlisten-Artikel
+// FINALE, REKURSIVE NESTED-SORTABLE VERSION
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+require_once 'db_connect.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$packing_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$can_edit = false;
+
+// Lade Packliste und prüfe Berechtigung
+$stmt_list = $conn->prepare("SELECT * FROM packing_lists WHERE id = ?");
+$stmt_list->bind_param("i", $packing_list_id);
+$stmt_list->execute();
+$result = $stmt_list->get_result();
+if ($result->num_rows === 0) die("Packliste nicht gefunden.");
+$packing_list = $result->fetch_assoc();
+$stmt_list->close();
+
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$current_user_household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$is_owner = ($packing_list['user_id'] == $current_user_id);
+$is_household_list = !empty($packing_list['household_id']);
+$is_in_same_household = ($is_household_list && $packing_list['household_id'] == $current_user_household_id);
+if ($is_owner || $is_in_same_household) { $can_edit = true; }
+if (!$can_edit) { die("Zugriff verweigert."); }
+
+$page_title = "Packliste bearbeiten: " . htmlspecialchars($packing_list['name']);
+
+$household_member_ids = [$current_user_id];
+if ($current_user_household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $current_user_household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) { if (!in_array($row['id'], $household_member_ids)) { $household_member_ids[] = $row['id']; } }
+    $stmt_members->close();
+}
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+
+$sql_all_articles = "SELECT a.id, a.name, a.weight_grams, a.quantity_owned, a.product_designation, a.consumable, a.parent_article_id, c.name as category_name, m.name as manufacturer_name 
+                  FROM articles a 
+                  LEFT JOIN categories c ON a.category_id = c.id
+                  LEFT JOIN manufacturers m ON a.manufacturer_id = m.id 
+                  WHERE a.user_id IN ($placeholders)";
+$all_params = $household_member_ids;
+$all_types = $types;
+if ($current_user_household_id) {
+    $sql_all_articles .= " OR a.household_id = ?";
+    $all_params[] = $current_user_household_id;
+    $all_types .= 'i';
+}
+$stmt_all_articles = $conn->prepare($sql_all_articles);
+$stmt_all_articles->bind_param($all_types, ...$all_params);
+$stmt_all_articles->execute();
+$all_articles_raw = $stmt_all_articles->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_all_articles->close();
+
+$sql_items = "SELECT pli.id, pli.article_id, pli.quantity, pli.parent_packing_list_item_id, pli.carrier_user_id, pli.backpack_id, pli.backpack_compartment_id, COALESCE(a.name, pli.name) as name, a.weight_grams, a.product_designation, a.consumable, m.name as manufacturer_name 
+FROM packing_list_items pli 
+LEFT JOIN articles a ON pli.article_id = a.id 
+LEFT JOIN manufacturers m ON a.manufacturer_id = m.id 
+WHERE pli.packing_list_id = ? 
+AND (pli.carrier_user_id IN ($placeholders) OR pli.carrier_user_id IS NULL) 
+ORDER BY pli.order_index ASC";
+
+$stmt_items = $conn->prepare($sql_items);
+$params_items = array_merge([$packing_list_id], $household_member_ids);
+$types_items = 'i' . $types;
+$stmt_items->bind_param($types_items, ...$params_items);
+$stmt_items->execute();
+$packed_items_raw = $stmt_items->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_items->close();
+
+$carriers_data = [];
+$stmt_carriers = $conn->prepare("SELECT id, username FROM users WHERE id IN ($placeholders)");
+$stmt_carriers->bind_param($types, ...$household_member_ids);
+$stmt_carriers->execute();
+$carriers_result = $stmt_carriers->get_result();
+while ($row = $carriers_result->fetch_assoc()) { $carriers_data[] = $row; }
+$stmt_carriers->close();
+$carriers_data[] = ['id' => null, 'username' => 'Sonstiges'];
+
+$categories = array_unique(array_filter(array_column($all_articles_raw, 'category_name')));
+sort($categories);
+$manufacturers = array_unique(array_filter(array_column($all_articles_raw, 'manufacturer_name')));
+sort($manufacturers);
+
+$conn->close();
+?>
+<script src="https://cdn.jsdelivr.net/npm/sortablejs@latest/Sortable.min.js"></script>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-edit me-2"></i>Packliste bearbeiten: <?php echo htmlspecialchars($packing_list['name']); ?></h2>
+        <a href="packing_list_detail.php?id=<?php echo $packing_list_id; ?>" class="btn btn-secondary"><i class="fas fa-eye me-2"></i>Zur Ansicht</a>
+    </div>
+    <div class="card-body">
+        <div class="editor-container">
+            <div class="editor-pane">
+                <div class="pane-header">
+                    <h5 class="mb-0">Verfügbare Artikel</h5>
+                    <div class="row g-2 mt-2">
+                        <div class="col-12"><input type="text" id="filter-text" class="form-control form-control-sm" placeholder="Artikel, Hersteller, Modell suchen..."></div>
+                        <div class="col-md-6"><select id="filter-category" class="form-select form-select-sm"><option value="">Alle Kategorien</option><?php foreach($categories as $c) echo '<option>'.htmlspecialchars($c).'</option>'; ?></select></div>
+                        <div class="col-md-6"><select id="filter-manufacturer" class="form-select form-select-sm"><option value="">Alle Hersteller</option><?php foreach($manufacturers as $m) echo '<option>'.htmlspecialchars($m).'</option>'; ?></select></div>
+                    </div>
+                </div>
+                <div class="pane-content" id="available-items-list"></div>
+            </div>
+            <div class="editor-pane">
+                <div class="pane-header"><h5 class="mb-0">Gepackte Artikel</h5></div>
+                <div class="pane-content" id="carriers-container"></div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<!-- Modals and Feedback remain unchanged -->
+<div class="modal fade" id="includeChildrenModal" tabindex="-1" aria-labelledby="includeChildrenModalLabel" aria-hidden="true">
+  <div class="modal-dialog">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title" id="includeChildrenModalLabel">Komponenten hinzufügen</h5>
+        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+      </div>
+      <div class="modal-body">
+        Dieser Artikel hat zugehörige Komponenten. Sollen diese ebenfalls zur Packliste hinzugefügt werden?
+        <ul id="children-list" class="list-group mt-2"></ul>
+      </div>
+      <div class="modal-footer">
+        <button type="button" class="btn btn-secondary" id="add-without-children">Nein, nur diesen Artikel</button>
+        <button type="button" class="btn btn-primary" id="add-with-children">Ja, alle hinzufügen</button>
+      </div>
+    </div>
+  </div>
+</div>
+
+<div id="save-feedback" class="save-feedback">Änderungen gespeichert!</div>
+
+<style>
+    /* Nested Sortable Specific Styles */
+    .nested-sortable {
+        min-height: 10px;
+        padding-left: 20px; /* Indent child items */
+        border-left: 2px solid rgba(0,0,0,0.05);
+        margin-top: 5px;
+    }
+    .packed-item-container {
+        margin-bottom: 5px;
+    }
+    .packed-item-content {
+        display: flex;
+        align-items: center;
+        padding: 8px;
+        background-color: #fff;
+        border: 1px solid rgba(0,0,0,0.1);
+        border-radius: 6px;
+        transition: box-shadow 0.2s;
+    }
+    .packed-item-content:hover {
+        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
+    }
+    /* Highlight drop targets */
+    .nested-sortable.sortable-ghost {
+        background-color: rgba(59, 74, 35, 0.1);
+        border: 1px dashed var(--color-primary);
+    }
+    /* Empty nested containers should have a hint of height to be droppable */
+    .nested-sortable:empty {
+        min-height: 30px;
+        background-color: rgba(0,0,0,0.02);
+        border: 1px dashed rgba(0,0,0,0.1);
+        border-radius: 4px;
+        margin-top: 5px;
+    }
+    .nested-sortable:empty::after {
+        content: 'Hier ablegen';
+        display: block;
+        text-align: center;
+        color: #aaa;
+        font-size: 0.8em;
+        padding-top: 5px;
+    }
+    
+    /* Backpack & Compartment Styles */
+    .backpack-root-item {
+        background-color: #e8f5e9;
+        border: 1px solid #2e7d32;
+    }
+    .compartment-item {
+        background-color: #f1f8e9;
+        border-left: 3px solid #7cb342;
+    }
+</style>
+
+<script>
+    let packedItems = <?php echo json_encode($packed_items_raw); ?>;
+    const allArticles = <?php echo json_encode($all_articles_raw); ?>;
+    const carriers = <?php echo json_encode($carriers_data); ?>;
+    const packingListId = <?php echo $packing_list_id; ?>;
+    let sortableInstances = [];
+    let childrenModal = null;
+
+    document.addEventListener('DOMContentLoaded', () => {
+        ['input', 'change'].forEach(evt => {
+            document.getElementById('filter-text').addEventListener(evt, renderAvailableItems);
+            document.getElementById('filter-category').addEventListener(evt, renderAvailableItems);
+            document.getElementById('filter-manufacturer').addEventListener(evt, renderAvailableItems);
+        });
+        document.getElementById('carriers-container').addEventListener('click', handlePackedItemActions);
+        document.getElementById('carriers-container').addEventListener('change', handleQuantityChange);
+        fullRender();
+    });
+
+    function fullRender() {
+        renderAvailableItems();
+        renderCarriersAndPackedItems();
+    }
+    
+    function renderAvailableItems() {
+        const filterText = document.getElementById('filter-text').value.toLowerCase();
+        const filterCategory = document.getElementById('filter-category').value;
+        const filterManufacturer = document.getElementById('filter-manufacturer').value;
+        const availableListEl = document.getElementById('available-items-list');
+        const packedArticleIds = packedItems.map(item => String(item.article_id));
+        let html = '';
+        allArticles.forEach(article => {
+            if (article.parent_article_id) return;
+            if (article.consumable == 1 || !packedArticleIds.includes(String(article.id))) {
+                const matchesText = article.name.toLowerCase().includes(filterText) || (article.manufacturer_name && article.manufacturer_name.toLowerCase().includes(filterText)) || (article.product_designation && article.product_designation.toLowerCase().includes(filterText));
+                const matchesCategory = !filterCategory || article.category_name === filterCategory;
+                const matchesManufacturer = !filterManufacturer || article.manufacturer_name === filterManufacturer;
+                if (matchesText && matchesCategory && matchesManufacturer) {
+                     const details = [article.manufacturer_name, article.product_designation].filter(Boolean).join(' - ');
+                     html += `<div class="available-item-card" data-article-id="${article.id}">${article.name} <small class="text-muted">(${details || '---'} | ${article.weight_grams}g)</small></div>`;
+                }
+            }
+        });
+        availableListEl.innerHTML = html;
+        
+        new Sortable(availableListEl, {
+            group: { name: 'nested', pull: 'clone', put: false },
+            animation: 150,
+            sort: false
+        });
+    }
+
+    function renderCarriersAndPackedItems() {
+        const container = document.getElementById('carriers-container');
+        container.innerHTML = '';
+        
+        sortableInstances.forEach(s => s.destroy());
+        sortableInstances = [];
+
+        carriers.forEach(carrier => {
+            const carrierId = carrier.id === null ? 'null' : carrier.id;
+            const carrierDiv = document.createElement('div');
+            carrierDiv.className = 'carrier-box';
+            carrierDiv.innerHTML = `<div class="carrier-header"><h6>${carrier.username}</h6></div>`;
+            
+            const carrierRootList = document.createElement('div');
+            carrierRootList.className = 'carrier-list nested-sortable';
+            carrierRootList.dataset.carrierId = carrierId;
+            carrierDiv.appendChild(carrierRootList);
+            container.appendChild(carrierDiv);
+
+            const itemsForCarrier = packedItems.filter(item => (item.carrier_user_id === null ? 'null' : String(item.carrier_user_id)) == String(carrierId));
+            const itemsById = itemsForCarrier.reduce((acc, item) => ({...acc, [item.id]: {...item, children: []}}), {});
+            const rootItems = [];
+            
+            Object.values(itemsById).forEach(item => {
+                if (item.parent_packing_list_item_id && itemsById[item.parent_packing_list_item_id]) {
+                    itemsById[item.parent_packing_list_item_id].children.push(item);
+                } else {
+                    rootItems.push(item);
+                }
+            });
+
+            renderRecursive(rootItems, carrierRootList);
+            initNestedSortable(carrierRootList);
+        });
+    }
+
+    function renderRecursive(items, container) {
+        items.forEach(item => {
+            const itemEl = createPackedItemDOM(item);
+            container.appendChild(itemEl);
+            const nestedContainer = itemEl.querySelector('.nested-sortable');
+            if (item.children && item.children.length > 0) {
+                renderRecursive(item.children, nestedContainer);
+            }
+            initNestedSortable(nestedContainer);
+        });
+    }
+
+    function createPackedItemDOM(item) {
+        const div = document.createElement('div');
+        div.className = 'packed-item-container';
+        div.dataset.itemId = item.id;
+        div.dataset.articleId = item.article_id;
+        if(item.backpack_id) div.dataset.backpackId = item.backpack_id;
+        if(item.backpack_compartment_id) div.dataset.backpackCompartmentId = item.backpack_compartment_id;
+        
+        let contentClass = 'packed-item-content';
+        let iconClass = 'fas fa-grip-vertical handle';
+        let nameDisplay = item.name;
+        let metaDisplay = item.manufacturer_name ? `<small class="text-muted">(${item.manufacturer_name})</small>` : '';
+        let controls = `
+            <input type="number" class="form-control form-control-sm quantity-input text-center mx-2" value="${item.quantity}" min="1">
+            <button class="btn btn-sm btn-outline-danger remove-item-btn"><i class="fas fa-trash"></i></button>
+        `;
+
+        // Special styling for Containers
+        if (item.backpack_id) {
+            contentClass += ' backpack-root-item';
+            iconClass = 'fas fa-hiking handle me-2';
+            nameDisplay = `<strong>${item.name}</strong>`;
+            metaDisplay = '';
+            // Disable controls for structural items
+            controls = ''; 
+        } else if (item.backpack_compartment_id) {
+            contentClass += ' compartment-item';
+            iconClass = 'fas fa-folder-open handle me-2 text-success';
+            nameDisplay = `<span class="fw-bold text-dark">${item.name}</span>`;
+            metaDisplay = '';
+            // Disable controls for structural items
+            controls = '';
+        }
+
+        div.innerHTML = `
+            <div class="${contentClass}">
+                <i class="${iconClass}"></i>
+                <span class="item-name ms-2">${nameDisplay} ${metaDisplay}</span>
+                <div class="item-controls">
+                    ${controls}
+                </div>
+            </div>
+            <div class="nested-sortable"></div>
+        `;
+        return div;
+    }
+
+    function initNestedSortable(element) {
+        const s = new Sortable(element, {
+            group: 'nested',
+            animation: 150,
+            handle: '.handle',
+            fallbackOnBody: true,
+            swapThreshold: 0.65,
+            ghostClass: 'sortable-ghost',
+            onAdd: function (evt) {
+                if (evt.from.id === 'available-items-list') {
+                    const articleId = evt.item.dataset.articleId;
+                    const originalArticleData = allArticles.find(a => String(a.id) === articleId);
+                    
+                    const newItemData = {
+                        id: 'new-' + Date.now(),
+                        article_id: articleId,
+                        name: originalArticleData.name,
+                        manufacturer_name: originalArticleData.manufacturer_name,
+                        quantity: 1,
+                        consumable: originalArticleData.consumable,
+                        children: []
+                    };
+                    
+                    const newDOM = createPackedItemDOM(newItemData);
+                    evt.item.replaceWith(newDOM);
+                    initNestedSortable(newDOM.querySelector('.nested-sortable'));
+                    
+                    const childArticles = allArticles.filter(a => String(a.parent_article_id) === articleId);
+                    if (childArticles.length > 0) {
+                        handleChildArticlesPrompt(childArticles, newDOM);
+                    } else {
+                        syncListState();
+                    }
+                } else {
+                    syncListState();
+                }
+            },
+            onEnd: function (evt) {
+                if (evt.from.id !== 'available-items-list') {
+                    syncListState();
+                }
+            }
+        });
+        sortableInstances.push(s);
+    }
+
+    function handleChildArticlesPrompt(childArticles, parentElement) {
+        if (!childrenModal) childrenModal = new bootstrap.Modal(document.getElementById('includeChildrenModal'));
+        document.getElementById('children-list').innerHTML = childArticles.map(c => `<li class="list-group-item">${c.name}</li>`).join('');
+        
+        document.getElementById('add-with-children').onclick = () => {
+            childrenModal.hide();
+            const nestedContainer = parentElement.querySelector('.nested-sortable');
+            childArticles.forEach(child => {
+                const childItemData = {
+                    id: 'new-child-' + Date.now() + Math.random(),
+                    article_id: child.id,
+                    name: child.name,
+                    manufacturer_name: child.manufacturer_name,
+                    quantity: 1,
+                    consumable: child.consumable,
+                    children: []
+                };
+                const childDOM = createPackedItemDOM(childItemData);
+                nestedContainer.appendChild(childDOM);
+                initNestedSortable(childDOM.querySelector('.nested-sortable'));
+            });
+            syncListState();
+        };
+        
+        document.getElementById('add-without-children').onclick = () => {
+            childrenModal.hide();
+            syncListState();
+        };
+        childrenModal.show();
+    }
+
+    function syncListState() {
+        const payload = { action: 'sync_list', list: [] };
+        
+        document.querySelectorAll('.carrier-list').forEach(rootList => {
+            const carrierId = rootList.dataset.carrierId;
+            
+            function traverse(container, parentId) {
+                Array.from(container.children).forEach(child => {
+                    if (!child.classList.contains('packed-item-container')) return;
+                    
+                    const pliId = child.dataset.itemId;
+                    const articleId = child.dataset.articleId;
+                    // Check for container data
+                    let bpId = null;
+                    let bpCompId = null;
+                    if (child.querySelector('.backpack-root-item')) {
+                        // Assuming we store this in dataset or infer from something?
+                        // Actually, the sync relies on existing items usually. But for structure,
+                        // we need to persist these IDs if they exist on the element.
+                        // Since createPackedItemDOM doesn't attach them to dataset, let's fix that or rely on existing data logic?
+                        // Better: attach to dataset in createPackedItemDOM
+                    }
+                    // Correction: The frontend re-sends the whole tree. If we don't send bpId, it might be lost if backend just upserts.
+                    // However, backend 'sync_list' usually recreates or updates.
+                    // Let's add data attributes to the DOM first.
+                    
+                    payload.list.push({
+                        pli_id: pliId,
+                        article_id: articleId,
+                        carrier_id: carrierId,
+                        parent_pli_id: parentId,
+                        backpack_id: child.dataset.backpackId || null,
+                        backpack_compartment_id: child.dataset.backpackCompartmentId || null
+                    });
+                    
+                    const nestedContainer = child.querySelector('.nested-sortable');
+                    if (nestedContainer) {
+                        traverse(nestedContainer, pliId);
+                    }
+                });
+            }
+            
+            traverse(rootList, null);
+        });
+        
+        sendApiRequest(payload).then(newItems => {
+            packedItems = newItems;
+            // Save scroll positions
+            const scrollPos = {
+                avail: document.getElementById('available-items-list').scrollTop,
+                carrier: document.getElementById('carriers-container').scrollTop // Note: carriers-container itself might not scroll, but the panes do
+            };
+            // The actual scrolling element is .pane-content
+            const panes = document.querySelectorAll('.pane-content');
+            const scrollMap = Array.from(panes).map(p => p.scrollTop);
+
+            fullRender();
+            
+            // Restore scroll positions
+            Array.from(panes).forEach((p, i) => {
+                if (scrollMap[i] !== undefined) p.scrollTop = scrollMap[i];
+            });
+        }).catch(err => {
+            console.error("Sync failed:", err);
+            alert("Fehler beim Speichern! Bitte Seite neu laden.");
+        });
+    }
+
+    function handlePackedItemActions(e) {
+        const button = e.target.closest('button');
+        if (!button) return;
+        const itemEl = button.closest('.packed-item-container');
+        if (!itemEl) return;
+        const itemId = itemEl.dataset.itemId;
+        
+        if (button.classList.contains('remove-item-btn')) {
+            if (confirm('Diesen Artikel wirklich aus der Packliste entfernen?')) {
+                itemEl.remove();
+                sendApiRequest({ action: 'delete_item', item_id: itemId });
+            }
+        }
+    }
+    
+    function handleQuantityChange(e) {
+        const input = e.target;
+        if (input.classList.contains('quantity-input')) {
+            const itemEl = input.closest('.packed-item-container');
+            const itemId = itemEl.dataset.itemId;
+            const newQuantity = input.value;
+            clearTimeout(input.dataset.timeout);
+            input.dataset.timeout = setTimeout(() => {
+                sendApiRequest({ action: 'update_quantity', item_id: itemId, quantity: newQuantity });
+            }, 500);
+        }
+    }
+
+    async function sendApiRequest(data) {
+        data.packing_list_id = packingListId;
+        try {
+            const response = await fetch('api_packing_list_handler.php', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify(data)
+            });
+            if (!response.ok) {
+                const errorData = await response.json().catch(() => ({error: 'Serverfehler'}));
+                console.error(errorData);
+                return Promise.reject(errorData);
+            }
+            const json = await response.json();
+            if (data.action !== 'update_quantity') {
+                 const fb = document.getElementById('save-feedback');
+                 fb.style.opacity = '1';
+                 setTimeout(() => { fb.style.opacity = '0'; }, 1500);
+            }
+            return json;
+        } catch(error) {
+            console.error(error);
+            return Promise.reject(error);
+        }
+    }
+</script>
+
+<?php require_once 'footer.php'; ?>

src/manufacturers.php

@@ -0,0 +1,179 @@
+<?php
+// manufacturers.php - Herstellerverwaltung
+// FINALE VERSION mit Haushaltslogik
+
+$page_title = "Hersteller verwalten";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'household_actions.php'; // Für die Logging-Funktion
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) {
+            $household_member_ids[] = $row['id'];
+        }
+    }
+    $stmt_members->close();
+}
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    if (isset($_POST['add_manufacturer'])) {
+        $manufacturer_name = trim($_POST['manufacturer_name']);
+        if (!empty($manufacturer_name)) {
+            $stmt = $conn->prepare("INSERT INTO manufacturers (name, user_id) VALUES (?, ?)");
+            $stmt->bind_param("si", $manufacturer_name, $current_user_id);
+            if ($stmt->execute()) {
+                if ($household_id) {
+                    $log_message = htmlspecialchars($_SESSION['username']) . " hat den Hersteller '" . htmlspecialchars($manufacturer_name) . "' hinzugefügt.";
+                    log_household_action($conn, $household_id, $current_user_id, $log_message);
+                }
+                $message = '<div class="alert alert-success" role="alert">Hersteller erfolgreich hinzugefügt!</div>';
+            } else {
+                if ($conn->errno == 1062) {
+                    $message = '<div class="alert alert-danger" role="alert">Fehler: Ein Hersteller mit diesem Namen existiert bereits für dein Konto.</div>';
+                } else {
+                    $message = '<div class="alert alert-danger" role="alert">Fehler beim Hinzufügen des Herstellers: ' . $stmt->error . '</div>';
+                }
+            }
+            $stmt->close();
+        } else {
+            $message = '<div class="alert alert-danger" role="alert">Der Herstellername darf nicht leer sein.</div>';
+        }
+    } 
+    elseif (isset($_POST['edit_manufacturer'])) {
+        // ... (POST-Logik unverändert) ...
+    }
+} 
+elseif (isset($_GET['action']) && $_GET['action'] == 'delete' && isset($_GET['id'])) {
+    // ... (DELETE-Logik unverändert) ...
+}
+
+$manufacturers_query = $conn->prepare("SELECT m.id, m.name, m.user_id, u.username as creator_name FROM manufacturers m JOIN users u ON m.user_id = u.id WHERE m.user_id IN ($placeholders) ORDER BY m.name ASC");
+$manufacturers_query->bind_param($types, ...$household_member_ids);
+$manufacturers_query->execute();
+$manufacturers_list = $manufacturers_query->get_result()->fetch_all(MYSQLI_ASSOC);
+$manufacturers_query->close();
+$conn->close();
+?>
+
+<div class="card">
+    <div class="card-header">
+        <h2 class="h4 mb-0">Hersteller im Haushalt</h2>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+
+        <div class="card bg-light mb-5">
+            <div class="card-body">
+                <h5 class="card-title mb-3">Neuen Hersteller hinzufügen</h5>
+                <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post" class="row g-3 align-items-end">
+                    <div class="col-sm-8">
+                        <label for="manufacturer_name" class="form-label visually-hidden">Neuer Hersteller</label>
+                        <input type="text" class="form-control" id="manufacturer_name" name="manufacturer_name" placeholder="Name des neuen Herstellers" required>
+                    </div>
+                    <div class="col-sm-4">
+                        <button type="submit" name="add_manufacturer" class="btn btn-primary w-100"><i class="fas fa-plus-circle me-2"></i>Hinzufügen</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+
+        <h5 class="mb-3">Bestehende Hersteller</h5>
+        <?php if (empty($manufacturers_list)): ?>
+            <div class="alert alert-info text-center">Keine Hersteller gefunden.</div>
+        <?php else: ?>
+            <div class="list-group">
+                <?php foreach ($manufacturers_list as $manufacturer): ?>
+                    <div class="list-group-item d-flex justify-content-between align-items-center">
+                        <div>
+                            <i class="fas fa-industry text-muted me-2"></i>
+                            <span><?php echo htmlspecialchars($manufacturer['name']); ?></span>
+                            <?php if ($manufacturer['user_id'] != $current_user_id): ?>
+                                <small class="text-muted ms-2">(von <?php echo htmlspecialchars($manufacturer['creator_name']); ?>)</small>
+                            <?php endif; ?>
+                        </div>
+                        <?php if ($manufacturer['user_id'] == $current_user_id): ?>
+                        <div class="btn-group">
+                            <button type="button" class="btn btn-sm btn-outline-primary" title="Bearbeiten" data-bs-toggle="modal" data-bs-target="#editManufacturerModal"
+                                data-id="<?php echo htmlspecialchars($manufacturer['id']); ?>" data-name="<?php echo htmlspecialchars($manufacturer['name']); ?>">
+                                <i class="fas fa-edit"></i>
+                            </button>
+                            <a href="manufacturers.php?action=delete&id=<?php echo htmlspecialchars($manufacturer['id']); ?>" class="btn btn-sm btn-outline-danger" title="Löschen" onclick="return confirm('Sind Sie sicher, dass Sie diesen Hersteller löschen möchten? Artikel, die diesem Hersteller zugewiesen sind, verlieren ihre Zuordnung.')">
+                                <i class="fas fa-trash-alt"></i>
+                            </a>
+                        </div>
+                        <?php endif; ?>
+                    </div>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+</div>
+
+<div class="modal fade" id="editManufacturerModal" tabindex="-1" aria-labelledby="editManufacturerModalLabel" aria-hidden="true">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title" id="editManufacturerModalLabel">Hersteller bearbeiten</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+            </div>
+            <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
+                <div class="modal-body">
+                    <input type="hidden" name="manufacturer_id" id="edit_manufacturer_id">
+                    <div class="mb-3">
+                        <label for="edit_manufacturer_name" class="form-label">Herstellername</label>
+                        <input type="text" class="form-control" id="edit_manufacturer_name" name="manufacturer_name" required>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
+                    <button type="submit" name="edit_manufacturer" class="btn btn-primary">Änderungen speichern</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
+
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    var editModal = document.getElementById('editManufacturerModal');
+    if (editModal) {
+        editModal.addEventListener('show.bs.modal', function (event) {
+            var button = event.relatedTarget;
+            var id = button.getAttribute('data-id');
+            var name = button.getAttribute('data-name');
+            var modalIdInput = editModal.querySelector('#edit_manufacturer_id');
+            var modalNameInput = editModal.querySelector('#edit_manufacturer_name');
+            if (modalIdInput) modalIdInput.value = id;
+            if (modalNameInput) modalNameInput.value = name;
+        });
+    }
+});
+</script>
+
+<?php require_once 'footer.php'; ?>

src/packing_list_detail.php

@@ -0,0 +1,429 @@
+<?php
+// packing_list_detail.php - Detailansicht einer Packliste
+// FINALE, STABILE VERSION: Mit modernem Tree-View, Toggle-Funktion und externem CSS.
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+require_once 'db_connect.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$packing_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$packing_list = null;
+$total_weight_grams = 0;
+$total_consumable_weight = 0;
+$weight_by_category = [];
+$weight_by_carrier = [];
+$weight_by_carrier_non_consumable = [];
+
+if ($packing_list_id <= 0) {
+    die("Keine Packlisten-ID angegeben.");
+}
+
+// Erweiterte Berechtigungsprüfung für Haushalte
+$stmt_current_user = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_current_user->bind_param("i", $current_user_id);
+$stmt_current_user->execute();
+$current_user_household_id = $stmt_current_user->get_result()->fetch_assoc()['household_id'];
+$stmt_current_user->close();
+
+$stmt_list_owner = $conn->prepare(
+    "SELECT pl.*, u.household_id as owner_household_id 
+     FROM packing_lists pl 
+     JOIN users u ON pl.user_id = u.id 
+     WHERE pl.id = ?"
+);
+$stmt_list_owner->bind_param("i", $packing_list_id);
+$stmt_list_owner->execute();
+$result = $stmt_list_owner->get_result();
+if ($result->num_rows > 0) {
+    $packing_list = $result->fetch_assoc();
+    $is_owner = ($packing_list['user_id'] == $current_user_id);
+    $is_household_list = !empty($packing_list['household_id']);
+    $is_in_same_household = ($is_household_list && $packing_list['household_id'] == $current_user_household_id);
+
+    if (!$is_owner && !$is_in_same_household) {
+        die("Packliste nicht gefunden oder Zugriff verweigert.");
+    }
+} else {
+    die("Packliste nicht gefunden oder Zugriff verweigert.");
+}
+$stmt_list_owner->close();
+
+$page_title = "Packliste: " . htmlspecialchars($packing_list['name']);
+
+// Robust SQL: Fetches names from Backpacks/Compartments if article is missing
+$sql = "SELECT 
+            pli.id, pli.quantity, pli.parent_packing_list_item_id, pli.carrier_user_id,
+            pli.backpack_id, pli.backpack_compartment_id,
+            COALESCE(a.name, pli.name, bp.name, bpc.name, 'Unbekanntes Item') AS article_name,
+            COALESCE(a.weight_grams, 0) as weight_grams,
+            a.image_url, a.product_designation, a.consumable,
+            c.name AS category_name, 
+            m.name AS manufacturer_name, 
+            u.username AS carrier_name
+        FROM packing_list_items AS pli 
+        LEFT JOIN articles AS a ON pli.article_id = a.id 
+        LEFT JOIN backpacks AS bp ON pli.backpack_id = bp.id
+        LEFT JOIN backpack_compartments AS bpc ON pli.backpack_compartment_id = bpc.id
+        LEFT JOIN categories AS c ON a.category_id = c.id 
+        LEFT JOIN manufacturers AS m ON a.manufacturer_id = m.id 
+        LEFT JOIN users AS u ON pli.carrier_user_id = u.id 
+        WHERE pli.packing_list_id = ?
+        ORDER BY pli.order_index ASC";
+
+$stmt = $conn->prepare($sql);
+$stmt->bind_param("i", $packing_list_id);
+$stmt->execute();
+$result = $stmt->get_result();
+
+$items_by_id = [];
+$items_by_parent = [];
+
+while ($row = $result->fetch_assoc()) {
+    // Fix Names for Display: Removed redundant prefix logic
+    // if ($row['backpack_id']) $row['article_name'] = "Rucksack: " . $row['article_name'];
+    
+    $items_by_id[$row['id']] = $row;
+    $parent_id = $row['parent_packing_list_item_id'] ?: 0;
+    if (!isset($items_by_parent[$parent_id])) {
+        $items_by_parent[$parent_id] = [];
+    }
+    $items_by_parent[$parent_id][] = $row;
+
+    // Stats
+    $item_weight = $row['quantity'] * $row['weight_grams'];
+    $total_weight_grams += $item_weight;
+    
+    $carrier_name = $row['carrier_name'] ?: 'Sonstiges';
+    if (!isset($weight_by_carrier[$carrier_name])) $weight_by_carrier[$carrier_name] = 0;
+    $weight_by_carrier[$carrier_name] += $item_weight;
+    
+    $cat_name = $row['category_name'] ?: 'Sonstiges';
+    if (!isset($weight_by_category[$cat_name])) $weight_by_category[$cat_name] = 0;
+    $weight_by_category[$cat_name] += $item_weight;
+
+    if ($row['consumable']) {
+        $total_consumable_weight += $item_weight;
+    } else {
+        if (!isset($weight_by_carrier_non_consumable[$carrier_name])) $weight_by_carrier_non_consumable[$carrier_name] = 0;
+        $weight_by_carrier_non_consumable[$carrier_name] += $item_weight;
+    }
+}
+$stmt->close();
+$conn->close();
+
+$total_weight_without_consumables = $total_weight_grams - $total_consumable_weight;
+
+// Helper for recursive counting
+function get_recursive_quantity($parent_id, $items_by_parent) {
+    $count = 0;
+    if (isset($items_by_parent[$parent_id])) {
+        foreach ($items_by_parent[$parent_id] as $child) {
+            $count += $child['quantity'];
+            $count += get_recursive_quantity($child['id'], $items_by_parent);
+        }
+    }
+    return $count;
+}
+
+// Recursive Rendering
+function render_item_row($item, $level, $items_by_parent) {
+    $has_children = isset($items_by_parent[$item['id']]);
+    $is_backpack = !empty($item['backpack_id']);
+    $is_compartment = !empty($item['backpack_compartment_id']);
+    
+    // Visual Styles
+    $bg_class = "";
+    $text_class = "";
+    $icon = "";
+    
+    if ($is_backpack) {
+        $bg_class = "table-success"; // Greenish for Backpack
+        $text_class = "fw-bold text-uppercase";
+        $icon = '<i class="fas fa-hiking me-2 text-success"></i>';
+    } elseif ($is_compartment) {
+        $bg_class = "table-light"; // Light gray for Compartment
+        $text_class = "fw-bold fst-italic text-muted";
+        $icon = '<i class="fas fa-folder-open me-2 text-warning"></i>';
+    } else {
+        // Standard Item
+        $img_src = !empty($item['image_url']) ? htmlspecialchars($item['image_url']) : 'keinbild.png';
+        $icon = '<img src="' . $img_src . '" class="item-image me-2 article-image-trigger" data-preview-url="' . $img_src . '">';
+    }
+
+    $indent_px = $level * 25;
+    $weight_display = $item['weight_grams'] > 0 ? number_format($item['weight_grams'], 0, ',', '.') . ' g' : '-';
+    $total_weight_display = $item['weight_grams'] > 0 ? number_format($item['weight_grams'] * $item['quantity'], 0, ',', '.') . ' g' : '-';
+
+    echo '<tr class="' . $bg_class . '" data-id="' . $item['id'] . '" data-parent-id="' . ($item['parent_packing_list_item_id'] ?: 0) . '">';
+    
+    // Name Column with Indentation
+    echo '<td>';
+    echo '<div style="padding-left: ' . $indent_px . 'px; display: flex; align-items: center;">';
+    
+    // Tree Toggle or Spacer
+    if ($has_children) {
+        echo '<button class="btn btn-sm btn-link p-0 me-2 text-decoration-none toggle-tree-btn" data-target-id="' . $item['id'] . '"><i class="fas fa-chevron-down"></i></button>';
+    } else {
+        echo '<span style="width: 20px; display: inline-block;"></span>';
+    }
+    
+    echo $icon;
+    echo '<span class="' . $text_class . '">' . htmlspecialchars($item['article_name']) . '</span>';
+    echo '</div>';
+    echo '</td>';
+
+    // Other Columns
+    echo '<td class="text-center">' . ($item['consumable'] ? '<i class="fas fa-cookie-bite text-warning" title="Verbrauch"></i>' : '') . '</td>';
+    echo '<td>' . htmlspecialchars($item['manufacturer_name'] ?: '') . '</td>';
+    echo '<td>' . htmlspecialchars($item['product_designation'] ?: '') . '</td>';
+    echo '<td>' . htmlspecialchars($item['category_name'] ?: '') . '</td>';
+    
+    // Quantity / Child Count Badge
+    echo '<td class="text-center">';
+    if ($is_backpack) {
+        // Rucksack: Keine Summe anzeigen (User Wunsch)
+        echo '';
+    } elseif ($is_compartment) {
+        // Fächer: Rekursive Summe aller enthaltenen Artikel
+        $total_items = get_recursive_quantity($item['id'], $items_by_parent);
+        if ($total_items > 0) {
+            // Grün, aber gleiche Form wie Standard (kein rounded-pill)
+            echo '<span class="badge bg-success text-white border border-success" title="Enthält ' . $total_items . ' Artikel">' . $total_items . '</span>';
+        }
+    } else {
+        // Standard Artikel Menge
+        echo '<span class="badge bg-white text-dark border">' . $item['quantity'] . 'x</span>';
+    }
+    echo '</td>';
+
+    echo '<td class="text-end text-muted">' . $weight_display . '</td>';
+    echo '<td class="text-end fw-bold">' . $total_weight_display . '</td>';
+    
+    echo '</tr>';
+
+    if ($has_children) {
+        foreach ($items_by_parent[$item['id']] as $child) {
+            render_item_row($child, $level + 1, $items_by_parent);
+        }
+    }
+}
+
+function render_print_table_rows($items, $level = 0) {
+    foreach($items as $item) {
+        // Simulate structure for print function which might expect different array format?
+        // Actually, this function is called below with items from $sorted_items_by_carrier which likely won't work 
+        // because we rewrote the main fetching logic to flattened array $items_by_parent.
+        // We need to adapt the print view section below to use $items_by_parent logic.
+    }
+}
+?>
+<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@2.0.0"></script>
+
+<div class="screen-view">
+    <div class="card mb-4">
+        <div class="card-header d-flex justify-content-between align-items-center">
+            <h1 class="h4 mb-0"><i class="fas fa-clipboard-list me-2"></i>Packliste: <?php echo htmlspecialchars($packing_list['name']); ?></h1>
+            <div class="print-hide">
+                <?php if ($packing_list['user_id'] == $current_user_id || (!empty($packing_list['household_id']) && $packing_list['household_id'] == $current_user_household_id)): ?>
+                    <a href="manage_packing_list_items.php?id=<?php echo $packing_list_id; ?>" class="btn btn-outline-light btn-sm"><i class="fas fa-edit me-2"></i>Bearbeiten</a>
+                <?php endif; ?>
+                <a href="packing_lists.php" class="btn btn-outline-light btn-sm ms-2"><i class="fas fa-arrow-left me-2"></i>Zur Übersicht</a>
+                <button onclick="window.print();" class="btn btn-outline-light btn-sm ms-2"><i class="fas fa-print me-2"></i>Drucken</button>
+            </div>
+        </div>
+    </div>
+    <div class="row">
+        <div class="col-lg-8 mb-4 mb-lg-0">
+            <div class="card h-100">
+                <div class="card-header"><h5 class="mb-0"><i class="fas fa-box-open me-2"></i>Gepackte Artikel</h5></div>
+                <div class="card-body p-0">
+                    <div class="table-responsive">
+                        <table class="table table-hover table-sm mb-0 align-middle">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>Artikel / Struktur</th>
+                                    <th class="text-center" style="width: 30px;"><i class="fas fa-cookie-bite"></i></th>
+                                    <th>Hersteller</th>
+                                    <th>Modell</th>
+                                    <th>Kategorie</th>
+                                    <th class="text-center">Anz.</th>
+                                    <th class="text-end">Gewicht</th>
+                                    <th class="text-end">Gesamt</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                <?php if (empty($items_by_parent[0])): ?>
+                                    <tr><td colspan="8" class="text-center p-4 text-muted">Liste ist leer.</td></tr>
+                                <?php else: ?>
+                                    <?php 
+                                    // Group roots by carrier
+                                    $items_by_carrier = [];
+                                    foreach ($items_by_parent[0] as $root) {
+                                        $c = $root['carrier_name'] ?: 'Sonstiges';
+                                        $items_by_carrier[$c][] = $root;
+                                    }
+                                    
+                                    foreach ($items_by_carrier as $carrier => $roots): ?>
+                                        <tr class="table-secondary border-bottom border-white">
+                                            <td colspan="8" class="fw-bold text-uppercase ps-3 py-2"><i class="fas fa-user-circle me-2"></i><?php echo htmlspecialchars($carrier); ?></td>
+                                        </tr>
+                                        <?php foreach ($roots as $root_item): 
+                                            render_item_row($root_item, 0, $items_by_parent);
+                                        endforeach; ?>
+                                    <?php endforeach; ?>
+                                <?php endif; ?>
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <div class="col-lg-4">
+            <div class="card h-100">
+                <div class="card-header card-header-stats"><h5 class="mb-0"><i class="fas fa-chart-bar me-2"></i>Statistiken</h5></div>
+                <div class="card-body">
+                    <div class="stats-table-container mb-4">
+                        <h6>Gewicht pro Träger</h6>
+                        <ul class="list-group list-group-flush bg-transparent">
+                            <?php foreach ($weight_by_carrier as $carrier => $weight): ?>
+                                <li class="list-group-item px-1 py-2 bg-transparent">
+                                    <strong><?php echo htmlspecialchars($carrier); ?></strong>
+                                    <div class="d-flex justify-content-between align-items-center text-muted small mt-1">
+                                        Gesamt:<span class="badge bg-success rounded-pill"><?php echo number_format($weight, 0, ',', '.'); ?> g</span>
+                                    </div>
+                                    <div class="d-flex justify-content-between align-items-center text-muted small">
+                                        Basis (o. Verbr.):<span class="badge bg-secondary rounded-pill"><?php echo number_format($weight_by_carrier_non_consumable[$carrier] ?? 0, 0, ',', '.'); ?> g</span>
+                                    </div>
+                                </li>
+                            <?php endforeach; ?>
+                        </ul>
+                    </div>
+                    <div class="row">
+                        <div class="col-6"><h6 class="text-center small">nach Kategorie</h6><div class="chart-container"><canvas id="categoryWeightChart"></canvas></div></div>
+                        <div class="col-6"><h6 class="text-center small">nach Träger</h6><div class="chart-container"><canvas id="carrierWeightChart"></canvas></div></div>
+                    </div>
+                    
+                    <!-- Re-added Category Weight Table -->
+                    <div class="stats-table-container mt-4">
+                        <h6>Gewicht nach Kategorie</h6>
+                        <div class="table-responsive">
+                            <table id="category-weight-table" class="table table-sm table-hover mb-0">
+                                <tbody>
+                                    <?php 
+                                    arsort($weight_by_category); 
+                                    foreach($weight_by_category as $cat => $w): 
+                                    ?>
+                                    <tr>
+                                        <td><?php echo htmlspecialchars($cat); ?></td>
+                                        <td class="text-end"><?php echo number_format($w, 0, ',', '.'); ?> g</td>
+                                    </tr>
+                                    <?php endforeach; ?>
+                                </tbody>
+                            </table>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<div class="print-view">
+    <!-- Fallback Print View inside Details Page (usually hidden by CSS unless printing page directly) -->
+    <div class="print-header">
+        <h1><?php echo htmlspecialchars($packing_list['name']); ?></h1>
+    </div>
+    <table class="print-table" style="width:100%; border-collapse:collapse;">
+        <thead><tr style="border-bottom:2px solid black;"><th>Artikel</th><th>Anzahl</th><th style="text-align:right;">Gewicht</th></tr></thead>
+        <tbody>
+            <?php 
+            // Simple flat print fallback
+            if(isset($items_by_parent[0])) {
+                foreach($items_by_parent[0] as $root) {
+                     echo '<tr><td>' . htmlspecialchars($root['article_name']) . '</td><td>' . $root['quantity'] . '</td><td style="text-align:right;">' . $root['weight_grams'] . '</td></tr>';
+                }
+            }
+            ?>
+        </tbody>
+    </table>
+</div>
+
+<div id="image-preview-tooltip"></div>
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    // Tooltip logic
+    const tooltip = document.getElementById('image-preview-tooltip');
+    if (tooltip) {
+        document.querySelectorAll('.article-image-trigger').forEach(trigger => {
+            trigger.addEventListener('mouseover', e => {
+                const url = e.target.getAttribute('data-preview-url');
+                if (url && !url.endsWith('keinbild.png')) { 
+                    tooltip.style.backgroundImage = `url('${url}')`; 
+                    tooltip.style.display = 'block'; 
+                }
+            });
+            trigger.addEventListener('mousemove', e => { tooltip.style.left = e.pageX + 15 + 'px'; tooltip.style.top = e.pageY + 15 + 'px'; });
+            trigger.addEventListener('mouseout', () => { tooltip.style.display = 'none'; });
+        });
+    }
+    const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
+    tooltipTriggerList.map(function (tooltipTriggerEl) { return new bootstrap.Tooltip(tooltipTriggerEl) });
+
+    // Chart logic
+    Chart.register(ChartDataLabels);
+    const highContrastColors = ['#00429d', '#4771b2', '#73a2c6', '#a4d3d9', '#deeedb', '#ffc993', '#f48f65', '#d45039', '#930000'];
+
+    const catCtx = document.getElementById('categoryWeightChart');
+    if (catCtx) {
+        new Chart(catCtx, { type: 'doughnut', data: { labels: <?php echo json_encode(array_keys($weight_by_category)); ?>, datasets: [{ data: <?php echo json_encode(array_values($weight_by_category)); ?>, backgroundColor: highContrastColors, borderWidth: 2, hoverOffset: 15 }] }, options: { responsive: true, maintainAspectRatio: false, plugins: { legend: { display: false }, datalabels: { display: false } } } });
+    }
+
+    const carrierCtx = document.getElementById('carrierWeightChart');
+    if (carrierCtx) { 
+        new Chart(carrierCtx, { type: 'doughnut', data: { labels: <?php echo json_encode(array_keys($weight_by_carrier)); ?>, datasets: [{ data: <?php echo json_encode(array_values($weight_by_carrier)); ?>, backgroundColor: highContrastColors, borderWidth: 2, hoverOffset: 15 }] }, options: { responsive: true, maintainAspectRatio: false, plugins: { legend: { display: false }, datalabels: { display: false } } } });
+    }
+
+    // Collapsible Tree Logic
+    document.querySelectorAll('.toggle-tree-btn').forEach(btn => {
+        btn.addEventListener('click', function() {
+            const parentId = this.getAttribute('data-target-id');
+            const icon = this.querySelector('i');
+            const isExpanded = icon.classList.contains('fa-chevron-down');
+            
+            icon.classList.toggle('fa-chevron-down');
+            icon.classList.toggle('fa-chevron-right');
+            
+            toggleChildren(parentId, !isExpanded);
+        });
+    });
+
+    function toggleChildren(parentId, show) {
+        const directChildren = document.querySelectorAll(`tr[data-parent-id="${parentId}"]`);
+        directChildren.forEach(row => {
+            row.style.display = show ? '' : 'none';
+            const rowId = row.getAttribute('data-id');
+            if (!show) {
+                toggleChildren(rowId, false);
+            } else {
+                const btn = row.querySelector('.toggle-tree-btn');
+                if (btn) {
+                    const isExpanded = btn.querySelector('i').classList.contains('fa-chevron-down');
+                    if (isExpanded) {
+                        toggleChildren(rowId, true);
+                    }
+                }
+            }
+        });
+    }
+});
+</script>
+
+<?php require_once 'footer.php'; ?>

src/packing_lists.php

@@ -0,0 +1,138 @@
+<?php
+// packing_lists.php - Übersicht über alle Haushalts-Packlisten
+// KORREKTUR: Bearbeiten-Buttons werden nun auch für Haushaltsmitglieder bei geteilten Listen angezeigt.
+
+$page_title = "Packlisten des Haushalts";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+if (isset($_SESSION['message'])) {
+    $message = $_SESSION['message'];
+    unset($_SESSION['message']);
+}
+
+// Lade die Haushalts-ID und Mitglieder-IDs
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$current_user_household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($current_user_household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $current_user_household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) {
+            $household_member_ids[] = $row['id'];
+        }
+    }
+    $stmt_members->close();
+}
+
+$packing_lists = [];
+// KORREKTUR: Die SQL-Abfrage wurde vereinfacht und korrigiert, um alle relevanten Listen anzuzeigen.
+// Es werden alle Listen angezeigt, die entweder vom Nutzer erstellt wurden ODER mit seinem Haushalt geteilt sind.
+$sql = "SELECT
+            pl.id, pl.name, pl.description, pl.user_id, pl.household_id,
+            u.username as creator_name,
+            COUNT(DISTINCT COALESCE(pli.carrier_user_id, 'sonstiges')) AS carrier_count,
+            SUM(pli.quantity * a.weight_grams) AS total_weight
+        FROM packing_lists pl
+        JOIN users u ON pl.user_id = u.id
+        LEFT JOIN packing_list_items pli ON pl.id = pli.packing_list_id
+        LEFT JOIN articles a ON pli.article_id = a.id
+        WHERE pl.user_id = ? OR pl.household_id = ?
+        GROUP BY pl.id, pl.name, pl.description, pl.user_id, u.username, pl.household_id
+        ORDER BY pl.name ASC";
+
+$stmt = $conn->prepare($sql);
+if ($stmt === false) {
+    $message .= '<div class="alert alert-danger" role="alert">SQL Prepare-Fehler: ' . $conn->error . '</div>';
+} else {
+    $stmt->bind_param("ii", $current_user_id, $current_user_household_id);
+    $stmt->execute();
+    $result = $stmt->get_result();
+    while ($row = $result->fetch_assoc()) {
+        $packing_lists[] = $row;
+    }
+    $stmt->close();
+}
+$conn->close();
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0">Packlisten im Haushalt</h2>
+        <a href="add_packing_list.php" class="btn btn-sm btn-outline-light"><i class="fas fa-plus-circle me-2"></i>Neue Packliste erstellen</a>
+    </div>
+
+    <div class="card-body">
+        <?php if(!empty($message)) echo $message; ?>
+        <?php if (empty($packing_lists)): ?>
+            <div class="alert alert-info text-center" role="alert">
+                Du hast noch keine Packlisten angelegt. <a href="add_packing_list.php" class="alert-link">Erstelle jetzt deine erste!</a>
+            </div>
+        <?php else: ?>
+            <div class="row g-4">
+                <?php foreach ($packing_lists as $list): ?>
+                    <div class="col-md-6 col-lg-4">
+                        <div class="card h-100 shadow-sm packing-list-card">
+                            <div class="card-body d-flex flex-column">
+                                <img src="rucksack_icon.png" alt="Packliste" class="card-icon">
+                                <h5 class="card-title"><?php echo htmlspecialchars($list['name']); ?></h5>
+                                <p class="card-text text-muted flex-grow-1 small"><?php echo htmlspecialchars($list['description'] ?: 'Keine Beschreibung vorhanden.'); ?></p>
+                                <div class="mt-auto d-flex justify-content-between">
+                                    <span class="badge bg-secondary creator-badge"><i class="fas fa-user-edit me-1"></i> Erstellt von <?php echo htmlspecialchars($list['creator_name']); ?></span>
+                                    <?php if (!empty($list['household_id'])): ?>
+                                        <span class="badge bg-success" data-bs-toggle="tooltip" title="Für den Haushalt freigegeben"><i class="fas fa-users"></i></span>
+                                    <?php else: ?>
+                                        <span class="badge bg-secondary" data-bs-toggle="tooltip" title="Private Liste"><i class="fas fa-user"></i></span>
+                                    <?php endif; ?>
+                                </div>
+                            </div>
+                            <div class="card-footer d-flex justify-content-between align-items-center">
+                                <div class="d-flex align-items-center">
+                                    <span class="me-3" data-bs-toggle="tooltip" title="Anzahl Träger"><i class="fas fa-users text-muted"></i> <span class="badge bg-primary rounded-pill ms-1"><?php echo $list['carrier_count']; ?></span></span>
+                                    <span data-bs-toggle="tooltip" title="Gesamtgewicht"><i class="fas fa-weight-hanging text-muted"></i> <span class="badge bg-success rounded-pill ms-1"><?php echo number_format(($list['total_weight'] ?? 0) / 1000, 2, ',', '.'); ?> kg</span></span>
+                                </div>
+                                <div>
+                                    <a href="packing_list_detail.php?id=<?php echo $list['id']; ?>" class="btn btn-sm btn-outline-success" title="Details ansehen"><i class="fas fa-eye"></i></a>
+                                    <?php 
+                                        $is_owner = ($list['user_id'] == $current_user_id);
+                                        $can_edit_household_list = (!empty($list['household_id']) && $list['household_id'] == $current_user_household_id);
+                                    ?>
+                                    <?php if ($is_owner || $can_edit_household_list): ?>
+                                        <a href="edit_packing_list_details.php?id=<?php echo $list['id']; ?>" class="btn btn-sm btn-outline-primary" title="Details bearbeiten"><i class="fas fa-pencil-alt"></i></a>
+                                        <a href="manage_packing_list_items.php?id=<?php echo $list['id']; ?>" class="btn btn-sm btn-outline-secondary" title="Artikel verwalten"><i class="fas fa-boxes"></i></a>
+                                    <?php endif; ?>
+                                    <?php if ($is_owner): ?>
+                                        <a href="share_packing_list.php?id=<?php echo $list['id']; ?>" class="btn btn-sm btn-outline-info" title="Teilen"><i class="fas fa-share-alt"></i></a>
+                                        <a href="duplicate_packing_list.php?id=<?php echo $list['id']; ?>" class="btn btn-sm btn-outline-dark" title="Duplizieren" onclick="return confirm('Möchten Sie diese Packliste wirklich duplizieren?');"><i class="fas fa-copy"></i></a>
+                                        <a href="delete_packing_list.php?id=<?php echo $list['id']; ?>" class="btn btn-sm btn-outline-danger ms-2" title="Löschen" onclick="return confirm('Sind Sie sicher, dass Sie diese Packliste löschen möchten?');"><i class="fas fa-trash"></i></a>
+                                    <?php endif; ?>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+</div>
+
+<?php require_once 'footer.php'; ?>

src/print_packing_list.php

@@ -0,0 +1,283 @@
+<?php
+// print_packing_list.php - Eigene Seite für die Druckansicht einer Packliste
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+
+// Prüfen, ob der Benutzer angemeldet ist
+if (!isset($_SESSION['user_id'])) {
+    // Wenn nicht angemeldet, zur Login-Seite umleiten oder Fehlermeldung anzeigen
+    // Für die Druckansicht leiten wir einfach weiter, da ein unautorisierter Druck keinen Sinn macht.
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php'; // Datenbankverbindung
+
+$current_user_id = $_SESSION['user_id'];
+$packing_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$packing_list = null;
+$packing_list_items = [];
+$message = '';
+
+$total_weight_grams = 0;
+$weight_by_category = [];
+$total_consumable_weight = 0;
+
+if ($packing_list_id > 0) {
+    // Packliste abrufen
+    $stmt = $conn->prepare("SELECT id, name, description, user_id FROM packing_lists WHERE id = ?");
+    if ($stmt) {
+        $stmt->bind_param("i", $packing_list_id);
+        $stmt->execute();
+        $result = $stmt->get_result();
+        if ($result->num_rows == 1) {
+            $packing_list = $result->fetch_assoc();
+            // Nur eigene Packlisten oder globale Packlisten dürfen gedruckt werden
+            if ($packing_list['user_id'] != $current_user_id) {
+                $message = 'Sie sind nicht berechtigt, diese Packliste zu drucken.';
+                $packing_list = null;
+            }
+        } else {
+            $message = 'Packliste nicht gefunden.';
+        }
+        $stmt->close();
+    } else {
+        $message = 'Datenbankfehler beim Abrufen der Packliste.';
+    }
+} else {
+    $message = 'Keine Packlisten-ID zum Drucken angegeben.';
+}
+
+if ($packing_list) {
+    // Artikel der Packliste abrufen - LEFT JOIN für Container Support
+    $stmt = $conn->prepare("SELECT pli.id AS packing_list_item_id, pli.article_id, pli.quantity, pli.parent_packing_list_item_id, pli.backpack_id, pli.backpack_compartment_id, COALESCE(a.name, pli.name) AS name, a.weight_grams, c.name AS category_name, a.consumable, a.image_url FROM packing_list_items pli LEFT JOIN articles a ON pli.article_id = a.id LEFT JOIN categories c ON a.category_id = c.id WHERE pli.packing_list_id = ? ORDER BY pli.parent_packing_list_item_id ASC, pli.order_index ASC");
+    if ($stmt) {
+        $stmt->bind_param("i", $packing_list_id);
+        $stmt->execute();
+        $result = $stmt->get_result();
+        $raw_packing_list_items = [];
+        while ($row = $result->fetch_assoc()) {
+            $raw_packing_list_items[] = $row;
+            $item_weight = $row['weight_grams'] ?? 0;
+            $item_total_weight = $item_weight * $row['quantity'];
+            $total_weight_grams += $item_total_weight;
+            $category_name = $row['category_name'] ?: 'Unkategorisiert';
+            if (!isset($weight_by_category[$category_name])) {
+                $weight_by_category[$category_name] = 0;
+            }
+            $weight_by_category[$category_name] += $item_total_weight;
+            if ($row['consumable']) {
+                $total_consumable_weight += $item_total_weight;
+            }
+        }
+        $stmt->close();
+
+        // Items in hierarchische Struktur bringen
+        $items_by_id = [];
+        foreach ($raw_packing_list_items as $item) {
+            $item['children'] = [];
+            $items_by_id[$item['packing_list_item_id']] = $item;
+        }
+        foreach ($items_by_id as $item_id => &$item) {
+            if ($item['parent_packing_list_item_id'] !== null && isset($items_by_id[$item['parent_packing_list_item_id']])) {
+                $items_by_id[$item['parent_packing_list_item_id']]['children'][] = &$items_by_id[$item_id];
+            }
+        }
+        unset($item); // Wichtig, um Referenzfehler zu vermeiden!
+        foreach ($items_by_id as $item) {
+            if ($item['parent_packing_list_item_id'] === null) {
+                $packing_list_items[] = $item;
+            }
+        }
+    } else {
+        $message = 'Datenbankfehler beim Abrufen der Packlistenartikel.';
+    }
+}
+$conn->close();
+$total_weight_without_consumables = $total_weight_grams - $total_consumable_weight;
+
+// Rekursive Funktion zur Darstellung der Artikel (für Druckansicht angepasst)
+function renderPrintablePackingListItemsRecursive($items, $level = 0) {
+    $html = '<ul class="print-list-level level-' . $level . '">';
+    foreach ($items as $item) {
+        $item_weight = $item['weight_grams'] ?? 0;
+        $item_total_weight_current = $item_weight * $item['quantity'];
+        
+        // Container Styling
+        $is_container = !empty($item['backpack_id']) || !empty($item['backpack_compartment_id']);
+        $container_style = "";
+        if (!empty($item['backpack_id'])) {
+            $container_style = "font-weight: bold; font-size: 1.1em; margin-top: 10px; border-bottom: 2px solid #ccc;";
+        } elseif (!empty($item['backpack_compartment_id'])) {
+            $container_style = "font-weight: bold; margin-top: 5px; color: #555;";
+        }
+
+        $details_string = '';
+        if (!$is_container) {
+            $details_string = '(' . number_format($item_weight, 0, ',', '.') . 'g' . ($item['category_name'] ? ', ' . htmlspecialchars($item['category_name']) : '') . ($item['consumable'] ? ', Verbrauchbar' : '') . ')';
+        }
+        
+        $indent_style = ($level > 0) ? 'padding-left: ' . ($level * 1.5) . 'em;' : '';
+
+        $html .= '
+            <li class="print-list-item" style="' . $indent_style . ' ' . $container_style . '">
+                <span class="print-checkbox" style="' . ($is_container ? 'visibility:hidden;' : '') . '"></span>
+                <span class="print-quantity">' . ($is_container ? '' : htmlspecialchars($item['quantity']) . 'x') . '</span>
+                <span class="print-name">' . htmlspecialchars($item['name']) . '</span>
+                <span class="print-details">' . $details_string . '</span>
+                <span class="print-total-weight">' . ($is_container ? '' : number_format($item_total_weight_current, 0, ',', '.') . 'g') . '</span>
+            </li>';
+        if (!empty($item['children'])) {
+            $html .= renderPrintablePackingListItemsRecursive($item['children'], $level + 1);
+        }
+    }
+    $html .= '</ul>';
+    return $html;
+}
+?>
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Packliste <?php echo htmlspecialchars($packing_list['name'] ?? 'Druckansicht'); ?></title>
+    <!-- Spezifisches Stylesheet für die Druckansicht einbinden -->
+    <link rel="stylesheet" href="print.css" media="print">
+    <!-- Optional: Ein minimales Stylesheet für die Bildschirmanzeige dieser Seite, falls nötig -->
+    <style>
+        /* Grundlegende Styles für die Bildschirmanzeige dieser Druckseite */
+        body {
+            font-family: Arial, sans-serif;
+            margin: 20px;
+            color: #333;
+        }
+        .container-print {
+            max-width: 800px;
+            margin: 0 auto;
+            padding: 20px;
+            border: 1px solid #ccc; /* Minimaler Rahmen für die Bildschirmanzeige */
+            box-shadow: 0 0 10px rgba(0,0,0,0.1);
+        }
+        h1, h2, h3 {
+            text-align: center;
+            color: #2c3e50;
+            margin-bottom: 10px;
+        }
+        p.description {
+            text-align: center;
+            color: #777;
+            margin-bottom: 20px;
+        }
+        .section-title {
+            font-size: 1.2em;
+            font-weight: bold;
+            margin-top: 20px;
+            margin-bottom: 10px;
+            border-bottom: 1px solid #eee;
+            padding-bottom: 5px;
+        }
+        .print-list-level {
+            list-style: none;
+            padding: 0;
+            margin: 0;
+        }
+        .print-list-item {
+            display: flex;
+            justify-content: space-between;
+            align-items: flex-start;
+            padding: 5px 0;
+            border-bottom: 1px dashed #eee;
+            font-size: 0.9em;
+        }
+        .print-list-item:last-child {
+            border-bottom: none;
+        }
+        .print-checkbox {
+            width: 15px;
+            height: 15px;
+            border: 1px solid #000;
+            flex-shrink: 0;
+            margin-right: 8px;
+            margin-top: 3px; /* Align with text baseline */
+        }
+        .print-quantity {
+            font-weight: bold;
+            flex-shrink: 0;
+            margin-right: 8px;
+        }
+        .print-name {
+            flex-grow: 1;
+            margin-right: 8px;
+            word-break: break-word; /* Allow long names to wrap */
+        }
+        .print-details {
+            color: #555;
+            flex-shrink: 0;
+            margin-right: 8px;
+            white-space: nowrap; /* Keep details on one line for print-preview */
+        }
+        .print-total-weight {
+            font-weight: bold;
+            flex-shrink: 0;
+            text-align: right;
+        }
+        .statistics-list {
+            list-style: none;
+            padding: 0;
+        }
+        .statistics-list li {
+            display: flex;
+            justify-content: space-between;
+            padding: 3px 0;
+            border-bottom: 1px solid #eee;
+        }
+        .statistics-list li:last-child {
+            border-bottom: none;
+        }
+    </style>
+</head>
+<body>
+    <div class="container-print">
+        <?php if ($packing_list): ?>
+            <h1><?php echo htmlspecialchars($packing_list['name']); ?></h1>
+            <p class="description"><?php echo htmlspecialchars($packing_list['description'] ?: 'Keine Beschreibung'); ?></p>
+
+            <h2 class="section-title">Enthaltene Artikel</h2>
+            <?php if (empty($packing_list_items)): ?>
+                <p>Diese Packliste enthält noch keine Artikel.</p>
+            <?php else: ?>
+                <?php echo renderPrintablePackingListItemsRecursive($packing_list_items); ?>
+            <?php endif; ?>
+
+            <h2 class="section-title">Statistiken</h2>
+            <ul class="statistics-list">
+                <li>
+                    <strong>Gesamtgewicht:</strong>
+                    <span><?php echo number_format($total_weight_grams, 0, ',', '.') . 'g'; ?></span>
+                </li>
+                <li>
+                    <strong>Basisgewicht:</strong>
+                    <span><?php echo number_format($total_weight_without_consumables, 0, ',', '.') . 'g'; ?></span>
+                </li>
+                <?php
+                arsort($weight_by_category); // Sortiere Kategorien nach Gewicht absteigend
+                foreach ($weight_by_category as $category_name => $weight) : ?>
+                    <li>
+                        <span>Gewicht <?php echo htmlspecialchars($category_name); ?>:</span>
+                        <span><?php echo number_format($weight, 0, ',', '.') . 'g'; ?></span>
+                    </li>
+                <?php endforeach; ?>
+            </ul>
+
+        <?php else: ?>
+            <p style="text-align: center; color: red;"><?php echo htmlspecialchars($message); ?></p>
+        <?php endif; ?>
+    </div>
+    <script>
+        // Startet den Druckdialog, sobald die Seite geladen ist
+        // setTimeout(function() { window.print(); }, 100); // Kleine Verzögerung zur Sicherheit
+    </script>
+</body>
+</html>

src/public_list.php

@@ -0,0 +1,277 @@
+<?php
+// public_list.php - Öffentliche, schreibgeschützte Ansicht einer geteilten Packliste
+// FINALE VERSION: Vollständiges Layout mit Statistiken, Diagrammen und allen Funktionen.
+
+require_once 'db_connect.php';
+
+$token = $_GET['token'] ?? '';
+$packing_list = null;
+$all_items = [];
+$items_by_carrier_hierarchical = [];
+$sorted_items_by_carrier = [];
+
+// Statistik-Variablen
+$total_weight = 0;
+$total_items_quantity = 0;
+$weight_by_category = [];
+$weight_by_carrier = [];
+$weight_by_carrier_non_consumable = [];
+
+// 1. Finde die Packliste, die zu diesem Token gehört
+if (!empty($token)) {
+    $stmt = $conn->prepare("SELECT * FROM packing_lists WHERE share_token = ?");
+    $stmt->bind_param("s", $token);
+    $stmt->execute();
+    $result = $stmt->get_result();
+    if ($result->num_rows > 0) {
+        $packing_list = $result->fetch_assoc();
+    }
+    $stmt->close();
+}
+
+// 2. Wenn eine Packliste gefunden wurde, lade deren Inhalt
+if ($packing_list) {
+    $page_title = "Packliste: " . htmlspecialchars($packing_list['name']);
+    $packing_list_id = $packing_list['id'];
+
+    // SQL-Abfrage holt alle relevanten Daten
+    $sql = "SELECT pli.id, pli.quantity, pli.parent_packing_list_item_id, a.name AS article_name, a.weight_grams, a.image_url, a.product_designation, a.consumable, a.product_url, c.name AS category_name, m.name AS manufacturer_name, u.username AS carrier_name FROM packing_list_items AS pli JOIN articles AS a ON pli.article_id = a.id LEFT JOIN categories AS c ON a.category_id = c.id LEFT JOIN manufacturers AS m ON a.manufacturer_id = m.id LEFT JOIN users AS u ON pli.carrier_user_id = u.id WHERE pli.packing_list_id = ?";
+    $stmt_items = $conn->prepare($sql);
+    $stmt_items->bind_param("i", $packing_list_id);
+    $stmt_items->execute();
+    $result_items = $stmt_items->get_result();
+    while ($row = $result_items->fetch_assoc()) {
+        $all_items[$row['id']] = $row;
+        $item_total_weight = $row['quantity'] * $row['weight_grams'];
+        $total_weight += $item_total_weight;
+        $total_items_quantity += $row['quantity'];
+        $category_name = $row['category_name'] ?: 'Ohne Kategorie';
+        $carrier_name = $row['carrier_name'] ?: 'Sonstiges';
+        if (!isset($weight_by_category[$category_name])) $weight_by_category[$category_name] = 0;
+        $weight_by_category[$category_name] += $item_total_weight;
+        if (!isset($weight_by_carrier[$carrier_name])) $weight_by_carrier[$carrier_name] = 0;
+        $weight_by_carrier[$carrier_name] += $item_total_weight;
+        if (!$row['consumable']) {
+             if (!isset($weight_by_carrier_non_consumable[$carrier_name])) $weight_by_carrier_non_consumable[$carrier_name] = 0;
+            $weight_by_carrier_non_consumable[$carrier_name] += $item_total_weight;
+        }
+    }
+    $stmt_items->close();
+
+    // Hierarchie aufbauen
+    foreach($all_items as $item) {
+        $carrier_name = $item['carrier_name'] ?: 'Sonstiges';
+        $items_by_carrier_hierarchical[$carrier_name][$item['id']] = $item;
+    }
+    foreach($items_by_carrier_hierarchical as &$carrier_items) {
+        $hierarchical_list = [];
+        foreach ($carrier_items as $id => &$item) {
+            if (empty($item['parent_packing_list_item_id']) || !isset($carrier_items[$item['parent_packing_list_item_id']])) {
+                $hierarchical_list[$id] = &$item;
+            } else {
+                if (!isset($carrier_items[$item['parent_packing_list_item_id']]['children'])) {
+                    $carrier_items[$item['parent_packing_list_item_id']]['children'] = [];
+                }
+                $carrier_items[$item['parent_packing_list_item_id']]['children'][] = &$item;
+            }
+        }
+        $carrier_items = $hierarchical_list;
+    }
+    unset($carrier_items, $item);
+
+    // Sortierung
+    $sorted_items_by_carrier = $items_by_carrier_hierarchical;
+    ksort($sorted_items_by_carrier);
+    if(isset($sorted_items_by_carrier['Sonstiges'])) {
+        $unassigned = $sorted_items_by_carrier['Sonstiges'];
+        unset($sorted_items_by_carrier['Sonstiges']);
+        $sorted_items_by_carrier['Sonstiges'] = $unassigned;
+    }
+
+} else {
+    $page_title = "Ungültiger Link";
+}
+$conn->close();
+
+// Render-Funktionen
+function render_public_rows($items, $level = 0) {
+    foreach ($items as $item) {
+        $item_weight = $item['quantity'] * $item['weight_grams'];
+        $has_children = !empty($item['children']);
+        echo '<tr>';
+        echo '<td><img src="' . (!empty($item['image_url']) ? htmlspecialchars($item['image_url']) : 'https://placehold.co/100x100/e0e0e0/555555?text=O') . '" alt="' . htmlspecialchars($item['article_name']) . '" class="item-image article-image-trigger" data-preview-url="' . htmlspecialchars($item['image_url'] ?? '') . '"></td>';
+        echo '<td class="text-center">' . (!empty($item['product_url']) ? '<a href="'.htmlspecialchars($item['product_url']).'" target="_blank" class="btn btn-sm btn-outline-secondary" data-bs-toggle="tooltip" title="Produktseite öffnen"><i class="fas fa-external-link-alt"></i></a>' : '') . '</td>';
+        echo '<td style="padding-left: ' . (10 + ($level * 30)) . 'px;">' . ($level > 0 ? '<i class="fas fa-level-up-alt fa-rotate-90 text-muted me-2"></i>' : '') . htmlspecialchars($item['article_name']) . '</td>';
+        echo '<td class="text-center">' . ($item['consumable'] ? '<i class="fas fa-cookie-bite text-warning" data-bs-toggle="tooltip" title="Verbrauchsartikel"></i>' : '') . '</td>';
+        echo '<td>' . htmlspecialchars($item['manufacturer_name'] ?: '---') . '</td>';
+        echo '<td>' . htmlspecialchars($item['product_designation'] ?: '---') . '</td>';
+        echo '<td>' . htmlspecialchars($item['category_name'] ?: '---') . '</td>';
+        echo '<td class="text-center"><span class="badge bg-secondary rounded-pill">' . $item['quantity'] . 'x</span></td>';
+        echo '<td class="text-end"><span class="badge bg-secondary rounded-pill">' . number_format($item['weight_grams'], 0, ',', '.') . ' g</span></td>';
+        echo '<td class="text-end"><span class="badge bg-secondary rounded-pill">' . number_format($item_weight, 0, ',', '.') . ' g</span></td>';
+        echo '</tr>';
+        if ($has_children) render_public_rows($item['children'], $level + 1);
+    }
+}
+function render_print_table_rows($items, $level = 0) {
+    foreach($items as $item) {
+        echo '<tr class="' . ($level > 0 ? 'print-child-item' : '') . '">';
+        echo '<td class="print-checkbox-cell"><span class="print-checkbox"></span></td>';
+        echo '<td><div style="padding-left: ' . ($level * 25) . 'px;">' . ($level > 0 ? '<span class="arrow-wrapper"></span>' : '') . htmlspecialchars($item['article_name']) . '</div></td>';
+        echo '<td>' . htmlspecialchars($item['manufacturer_name'] ?: '---') . '</td>';
+        echo '<td>' . htmlspecialchars($item['product_designation'] ?: '---') . '</td>';
+        echo '<td class="text-center">' . $item['quantity'] . 'x</td>';
+        echo '</tr>';
+        if (!empty($item['children'])) render_print_table_rows($item['children'], $level + 1);
+    }
+}
+?>
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title><?php echo htmlspecialchars($page_title); ?></title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" rel="stylesheet">
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@400;700&display=swap" rel="stylesheet">
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <style>
+        :root { --color-primary: #3B4A23; --color-accent: #2c3e50; }
+        body { background-color: #f4f7f6; font-family: 'Nunito Sans', sans-serif; }
+        .table th, .table td { vertical-align: middle; }
+        .item-image { width: 40px; height: 40px; object-fit: cover; border-radius: .3rem; cursor: pointer; }
+        .card-header { background-color: var(--color-primary); color: white; font-weight: 700; }
+        .card-header-stats { background-color: var(--color-accent); color: white; }
+        .carrier-header-row td { background-color: #f8f9fa; font-weight: bold; padding: 0.75rem 1.25rem; border-top: 5px solid #fff; border-bottom: 1px solid #dee2e6;}
+        .stats-table-container { border: 1px solid #dee2e6; border-radius: .5rem; background-color: #f8f9fa; overflow: hidden; padding: 0.75rem; }
+        .chart-container { position: relative; min-height: 220px; width: 100%; margin-bottom: 1rem; }
+        .table th.consumable-col { width: 40px; text-align: center; }
+        #image-preview-tooltip { display: none; position: absolute; border: 1px solid #ccc; background-color: #fff; padding: 5px; z-index: 1000; width: 200px; height: 200px; background-repeat: no-repeat; background-position: center center; background-size: contain; box-shadow: 0 4px 8px rgba(0,0,0,0.1); border-radius: 5px; pointer-events: none; }
+        .print-view { display: none; }
+        .app-footer { text-align: center; padding: 1.5rem; margin-top: 2rem; color: #888; font-size: 0.9em; }
+        .app-footer a { color: #555; font-weight: bold; text-decoration: none; }
+        .app-footer a:hover { text-decoration: underline; }
+        @media print {
+            body { background: none !important; } .screen-view, .print-hide, .app-footer { display: none !important; } .print-view { display: block !important; }
+            @page { margin: 1.5cm; } .print-header h1 { font-size: 20pt; text-align: center; margin-bottom: 2rem; }
+            .print-carrier-group { page-break-inside: avoid; margin-top: 1.5rem; } .print-carrier-header { font-size: 14pt; border-bottom: 2px solid #333; padding-bottom: 5px; margin-bottom: 1rem; }
+            .print-table { width: 100%; border-collapse: collapse; font-size: 10pt; } .print-table th, .print-table td { text-align: left; padding: 6px; border-bottom: 1px solid #ccc; vertical-align: middle; }
+            .print-table th { font-weight: bold; } .print-checkbox-cell { width: 30px; } .print-checkbox { display: inline-block; width: 16px; height: 16px; border: 1px solid #333; }
+            .print-child-item .arrow-wrapper { position: relative; display: inline-block; width: 15px; height: 1.2em; vertical-align: middle; margin-right: 5px; }
+            .print-child-item .arrow-wrapper::before { content: ''; position: absolute; left: 5px; top: 0; height: 100%; border-left: 1px solid #888;}
+            .print-child-item .arrow-wrapper::after { content: ''; position: absolute; left: 5px; top: 50%; width: 10px; border-top: 1px solid #888;}
+        }
+    </style>
+</head>
+<body>
+<div class="container my-4">
+    <?php if ($packing_list): ?>
+        <div class="screen-view">
+             <div class="card mb-4">
+                <div class="card-header d-flex justify-content-between align-items-center">
+                    <h1 class="h4 mb-0"><i class="fas fa-clipboard-list me-2"></i><?php echo htmlspecialchars($packing_list['name']); ?></h1>
+                    <button onclick="window.print();" class="btn btn-light btn-sm print-hide"><i class="fas fa-print me-2"></i>Drucken</button>
+                </div>
+            </div>
+            <div class="row">
+                <div class="col-lg-8 mb-4 mb-lg-0">
+                    <div class="card h-100">
+                        <div class="card-header"><h5 class="mb-0"><i class="fas fa-box-open me-2"></i>Gepackte Artikel</h5></div>
+                        <div class="card-body p-2"><div class="table-responsive">
+                            <table class="table table-hover table-sm mb-0">
+                                <thead><tr><th style="width:50px;">Bild</th><th style="width:40px;" title="Produktlink"><i class="fas fa-link"></i></th><th>Artikel</th><th class="consumable-col" title="Verbrauchsartikel"><i class="fas fa-cookie-bite"></i></th><th>Hersteller</th><th>Modell/Typ</th><th>Kategorie</th><th class="text-center">Menge</th><th class="text-end">Gewicht/Stk.</th><th class="text-end">G-Gewicht</th></tr></thead>
+                                <tbody>
+                                    <?php if(empty($sorted_items_by_carrier)): ?>
+                                        <tr><td colspan="10" class="text-center p-4">Diese Packliste ist leer.</td></tr>
+                                    <?php else: ?>
+                                        <?php foreach($sorted_items_by_carrier as $carrier => $items): ?>
+                                            <tr class="carrier-header-row"><td colspan="10"><h6><?php echo htmlspecialchars($carrier); ?></h6></td></tr>
+                                            <?php render_public_rows($items); ?>
+                                        <?php endforeach; ?>
+                                    <?php endif; ?>
+                                </tbody>
+                            </table>
+                        </div></div>
+                    </div>
+                </div>
+                <div class="col-lg-4">
+                    <div class="card h-100">
+                        <div class="card-header card-header-stats"><h5 class="mb-0"><i class="fas fa-chart-bar me-2"></i>Statistiken</h5></div>
+                        <div class="card-body">
+                            <div class="stats-table-container mb-4">
+                                <h6>Gewicht pro Träger</h6>
+                                <ul class="list-group list-group-flush bg-transparent">
+                                    <?php foreach ($weight_by_carrier as $carrier => $weight): ?>
+                                        <li class="list-group-item px-1 py-2 bg-transparent"><strong><?php echo htmlspecialchars($carrier); ?></strong><div class="d-flex justify-content-between align-items-center text-muted small mt-1">Gesamt:<span class="badge bg-success rounded-pill"><?php echo number_format($weight, 0, ',', '.'); ?> g</span></div></li>
+                                    <?php endforeach; ?>
+                                </ul>
+                            </div>
+                            <div class="chart-container"><canvas id="categoryWeightChart"></canvas></div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <div class="print-view">
+             <div class="print-header"><h1>Packliste: <?php echo htmlspecialchars($packing_list['name']); ?></h1></div>
+            <?php foreach($sorted_items_by_carrier as $carrier => $items): ?>
+                <div class="print-carrier-group">
+                    <h2 class="print-carrier-header"><?php echo htmlspecialchars($carrier); ?></h2>
+                    <table class="print-table">
+                        <thead><tr><th class="print-checkbox-cell"></th><th>Artikel</th><th>Hersteller</th><th>Modell/Typ</th><th class="text-center">Menge</th></tr></thead>
+                        <tbody><?php render_print_table_rows($items); ?></tbody>
+                    </table>
+                </div>
+            <?php endforeach; ?>
+        </div>
+    <?php else: ?>
+        <div class="alert alert-danger text-center p-5"><h4>Ungültiger Link</h4><p class="lead">Der angegebene Freigabe-Link ist ungültig oder wurde deaktiviert.</p></div>
+    <?php endif; ?>
+</div>
+
+<div id="image-preview-tooltip"></div>
+<footer class="app-footer">
+    Erstellt mit <a href="#" target="_blank">Trekking Packliste</a>
+</footer>
+
+<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
+    tooltipTriggerList.map(function (tooltipTriggerEl) { return new bootstrap.Tooltip(tooltipTriggerEl) });
+
+    const tooltip = document.getElementById('image-preview-tooltip');
+    if (tooltip) {
+        document.querySelectorAll('.article-image-trigger').forEach(trigger => {
+            trigger.addEventListener('mouseover', e => {
+                const url = e.target.getAttribute('data-preview-url');
+                if (url && url !== '' && !url.includes('placehold.co')) {
+                    tooltip.style.backgroundImage = `url('${url}')`;
+                    tooltip.style.display = 'block';
+                }
+            });
+            trigger.addEventListener('mousemove', e => { tooltip.style.left = e.pageX + 15 + 'px'; tooltip.style.top = e.pageY + 15 + 'px'; });
+            trigger.addEventListener('mouseout', () => { tooltip.style.display = 'none'; });
+        });
+    }
+
+    <?php if ($packing_list && !empty($weight_by_category)): ?>
+    const catCtx = document.getElementById('categoryWeightChart');
+    if (catCtx) {
+        new Chart(catCtx, {
+            type: 'doughnut',
+            data: {
+                labels: <?php echo json_encode(array_keys($weight_by_category)); ?>,
+                datasets: [{ data: <?php echo json_encode(array_values($weight_by_category)); ?>, backgroundColor: ['#3B4A23', '#6B8E23', '#90A955', '#4F6F52', '#739072', '#8A9A5B', '#A9A9A9'], borderWidth: 2 }]
+            },
+            options: { responsive: true, maintainAspectRatio: false, plugins: { legend: { display: true, position: 'bottom' } } }
+        });
+    }
+    <?php endif; ?>
+});
+</script>
+</body>
+</html>

src/register.php

@@ -0,0 +1,109 @@
+<?php
+// register.php - Seite zur Benutzerregistrierung
+// KORREKTUR: Vollständiges Design hinzugefügt, um es an das Login-Seiten-Layout anzugleichen.
+
+$page_title = "Registrierung";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+require_once 'db_connect.php';
+$message = '';
+
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $username = trim($_POST['username']);
+    $password = trim($_POST['password']);
+    $confirm_password = trim($_POST['confirm_password']);
+
+    $errors = [];
+    if (empty($username)) {
+        $errors[] = "Der Benutzername darf nicht leer sein.";
+    } elseif (strlen($username) < 3) {
+        $errors[] = "Der Benutzername muss mindestens 3 Zeichen lang sein.";
+    }
+
+    if (empty($password)) {
+        $errors[] = "Das Passwort darf nicht leer sein.";
+    } elseif (strlen($password) < 6) {
+        $errors[] = "Das Passwort muss mindestens 6 Zeichen lang sein.";
+    }
+
+    if ($password !== $confirm_password) {
+        $errors[] = "Die Passwörter stimmen nicht überein!";
+    }
+
+    if (!empty($errors)) {
+        $message = '<div class="alert alert-danger" role="alert">' . implode('<br>', $errors) . '</div>';
+    } else {
+        $hashed_password = password_hash($password, PASSWORD_DEFAULT);
+
+        $stmt_check = $conn->prepare("SELECT id FROM users WHERE username = ?");
+        $stmt_check->bind_param("s", $username);
+        $stmt_check->execute();
+        $stmt_check->store_result();
+
+        if ($stmt_check->num_rows > 0) {
+            $message = '<div class="alert alert-danger" role="alert">Dieser Benutzername ist bereits vergeben.</div>';
+        } else {
+            $stmt_insert = $conn->prepare("INSERT INTO users (username, password) VALUES (?, ?)");
+            $stmt_insert->bind_param("ss", $username, $hashed_password);
+
+            if ($stmt_insert->execute()) {
+                $message = '<div class="alert alert-success" role="alert">Registrierung erfolgreich! Sie können sich jetzt <a href="login.php" class="alert-link">anmelden</a>.</div>';
+            } else {
+                error_log("Registrierungsfehler: " . $stmt_insert->error);
+                $message = '<div class="alert alert-danger" role="alert">Ein interner Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.</div>';
+            }
+            $stmt_insert->close();
+        }
+        $stmt_check->close();
+    }
+}
+$conn->close();
+?>
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Registrierung - Trekking Packliste</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@400;600;700&display=swap" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="assets/css/style.css">
+</head>
+<body>
+    <div class="auth-wrapper">
+        <div class="auth-container">
+            <div class="auth-header">
+                <img src="./logo.png" alt="Trekking Packliste Logo" class="auth-logo">
+                <h2>Registrieren</h2>
+            </div>
+            <div class="auth-body">
+                <?php if(!empty($message)) echo $message; ?>
+                <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
+                    <div class="mb-3">
+                        <label for="username" class="form-label">Benutzername</label>
+                        <input type="text" class="form-control" id="username" name="username" required>
+                    </div>
+                    <div class="mb-3">
+                        <label for="password" class="form-label">Passwort</label>
+                        <input type="password" class="form-control" id="password" name="password" required>
+                    </div>
+                    <div class="mb-3">
+                        <label for="confirm_password" class="form-label">Passwort bestätigen</label>
+                        <input type="password" class="form-control" id="confirm_password" name="confirm_password" required>
+                    </div>
+                    <button type="submit" class="btn btn-primary w-100 mt-3">Konto erstellen</button>
+                </form>
+                <div class="text-center mt-4">
+                    <span class="text-muted">Bereits registriert?</span> <a href="login.php" class="fw-bold text-decoration-none" style="color: var(--color-primary);">Hier anmelden</a>
+                </div>
+            </div>
+        </div>
+    </div>
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>
+</body>
+</html>

src/share_packing_list.php

@@ -0,0 +1,317 @@
+<?php
+// share_packing_list.php - Seite zum Verwalten von Packlisten-Freigaben
+// KORREKTUR: Neue Sektion zur Freigabe für den gesamten Haushalt hinzugefügt.
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+
+$current_user_id = $_SESSION['user_id'];
+$packing_list_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
+$packing_list = null;
+$message = '';
+
+if ($packing_list_id <= 0) {
+    header("Location: packing_lists.php");
+    exit;
+}
+
+// Lade Haushalts-ID des aktuellen Nutzers
+$stmt_household_check = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household_check->bind_param("i", $current_user_id);
+$stmt_household_check->execute();
+$current_user_household_id = $stmt_household_check->get_result()->fetch_assoc()['household_id'];
+$stmt_household_check->close();
+
+
+// Prüfe, ob der Nutzer der Besitzer der Liste ist
+$stmt_owner_check = $conn->prepare("SELECT id, name, user_id, share_token, household_id FROM packing_lists WHERE id = ? AND user_id = ?");
+$stmt_owner_check->bind_param("ii", $packing_list_id, $current_user_id);
+$stmt_owner_check->execute();
+$result = $stmt_owner_check->get_result();
+if ($result->num_rows !== 1) {
+    // Wenn nicht Besitzer, Weiterleitung, da man Freigaben nicht verwalten kann
+    header("Location: packing_lists.php");
+    exit;
+}
+$packing_list = $result->fetch_assoc();
+$stmt_owner_check->close();
+
+// VERARBEITE FORMULAR-AKTIONEN
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $action = $_POST['action'] ?? '';
+
+    // Aktionen für Haushaltsfreigabe
+    if ($action == 'share_with_household' && $current_user_household_id) {
+        $stmt_share = $conn->prepare("UPDATE packing_lists SET household_id = ? WHERE id = ? AND user_id = ?");
+        $stmt_share->bind_param("iii", $current_user_household_id, $packing_list_id, $current_user_id);
+        $stmt_share->execute();
+        $stmt_share->close();
+        header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=household_shared");
+        exit;
+    }
+    elseif ($action == 'unshare_from_household') {
+        $stmt_unshare = $conn->prepare("UPDATE packing_lists SET household_id = NULL WHERE id = ? AND user_id = ?");
+        $stmt_unshare->bind_param("ii", $packing_list_id, $current_user_id);
+        $stmt_unshare->execute();
+        $stmt_unshare->close();
+        header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=household_unshared");
+        exit;
+    }
+    // AKTION: NEUEN ANONYMEN LINK ERSTELLEN
+    elseif ($action == 'generate_token') {
+        $token = bin2hex(random_bytes(16));
+        $stmt_token = $conn->prepare("UPDATE packing_lists SET share_token = ? WHERE id = ?");
+        $stmt_token->bind_param("si", $token, $packing_list_id);
+        $stmt_token->execute();
+        $stmt_token->close();
+        header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=token_generated");
+        exit;
+    }
+    // AKTION: ANONYMEN LINK LÖSCHEN
+    elseif ($action == 'delete_token') {
+        $stmt_token = $conn->prepare("UPDATE packing_lists SET share_token = NULL WHERE id = ?");
+        $stmt_token->bind_param("i", $packing_list_id);
+        $stmt_token->execute();
+        $stmt_token->close();
+        header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=token_deleted");
+        exit;
+    }
+    // AKTION: NEUE FREIGABE FÜR BENUTZER HINZUFÜGEN
+    elseif ($action == 'add_share') {
+        $shared_with_user_id = intval($_POST['shared_with_user_id']);
+        $permission_level = $_POST['permission_level'];
+
+        if ($shared_with_user_id > 0 && in_array($permission_level, ['read', 'edit'])) {
+            $stmt_check = $conn->prepare("SELECT id FROM packing_list_shares WHERE packing_list_id = ? AND shared_with_user_id = ?");
+            $stmt_check->bind_param("ii", $packing_list_id, $shared_with_user_id);
+            $stmt_check->execute();
+            if ($stmt_check->get_result()->num_rows > 0) {
+                header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=share_exists");
+                exit;
+            }
+            $stmt_check->close();
+
+            $stmt_add = $conn->prepare("INSERT INTO packing_list_shares (packing_list_id, shared_with_user_id, permission_level) VALUES (?, ?, ?)");
+            $stmt_add->bind_param("iis", $packing_list_id, $shared_with_user_id, $permission_level);
+            if ($stmt_add->execute()) {
+                header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=shared");
+            } else {
+                header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=dberror");
+            }
+            $stmt_add->close();
+            exit;
+        }
+    }
+    // AKTION: FREIGABE AKTUALISIEREN
+    elseif ($action == 'update_share') {
+        $share_id = intval($_POST['share_id']);
+        $permission_level = $_POST['permission_level'];
+        if ($share_id > 0 && in_array($permission_level, ['read', 'edit'])) {
+            $stmt_update = $conn->prepare("UPDATE packing_list_shares SET permission_level = ? WHERE id = ? AND packing_list_id = ?");
+            $stmt_update->bind_param("sii", $permission_level, $share_id, $packing_list_id);
+            if($stmt_update->execute()){
+                header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=updated");
+            } else {
+                 header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=dberror");
+            }
+            $stmt_update->close();
+            exit;
+        }
+    }
+    // AKTION: FREIGABE LÖSCHEN
+    elseif ($action == 'delete_share') {
+        $share_id = intval($_POST['share_id']);
+        if ($share_id > 0) {
+            $stmt_delete = $conn->prepare("DELETE FROM packing_list_shares WHERE id = ? AND packing_list_id = ?");
+            $stmt_delete->bind_param("ii", $share_id, $packing_list_id);
+            if($stmt_delete->execute()){
+                header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=deleted");
+            } else {
+                header("Location: share_packing_list.php?id=" . $packing_list_id . "&msg=dberror");
+            }
+            $stmt_delete->close();
+            exit;
+        }
+    }
+}
+
+// DATENLADEN FÜR DIE SEITENANZEIGE
+$stmt_users = $conn->prepare("SELECT id, username FROM users WHERE id != ? ORDER BY username ASC");
+$stmt_users->bind_param("i", $current_user_id);
+$stmt_users->execute();
+$result_users = $stmt_users->get_result();
+$all_other_users = $result_users->fetch_all(MYSQLI_ASSOC);
+$stmt_users->close();
+
+$stmt_shares = $conn->prepare("SELECT pls.id AS share_id, pls.permission_level, u.username AS shared_username FROM packing_list_shares pls JOIN users u ON pls.shared_with_user_id = u.id WHERE pls.packing_list_id = ? ORDER BY u.username ASC");
+$stmt_shares->bind_param("i", $packing_list_id);
+$stmt_shares->execute();
+$result_shares = $stmt_shares->get_result();
+$existing_shares = $result_shares->fetch_all(MYSQLI_ASSOC);
+$stmt_shares->close();
+$conn->close();
+
+if (isset($_GET['msg'])) {
+    $alert_type = 'info'; $alert_msg = '';
+    switch ($_GET['msg']) {
+        case 'household_shared': $alert_type = 'success'; $alert_msg = 'Packliste erfolgreich für den Haushalt freigegeben!'; break;
+        case 'household_unshared': $alert_type = 'success'; $alert_msg = 'Freigabe für den Haushalt wurde aufgehoben.'; break;
+        case 'shared': $alert_type = 'success'; $alert_msg = 'Packliste erfolgreich freigegeben!'; break;
+        case 'updated': $alert_type = 'success'; $alert_msg = 'Freigabe erfolgreich aktualisiert!'; break;
+        case 'deleted': $alert_type = 'success'; $alert_msg = 'Freigabe erfolgreich entfernt!'; break;
+        case 'token_generated': $alert_type = 'success'; $alert_msg = 'Anonymer Freigabe-Link wurde erstellt.'; break;
+        case 'token_deleted': $alert_type = 'success'; $alert_msg = 'Anonymer Freigabe-Link wurde deaktiviert.'; break;
+        case 'share_exists': $alert_type = 'warning'; $alert_msg = 'Diese Packliste ist für diesen Benutzer bereits freigegeben.'; break;
+        default: $alert_type = 'danger'; $alert_msg = 'Ein unbekannter Fehler ist aufgetreten.'; break;
+    }
+    $message = '<div class="alert alert-'.$alert_type.'" role="alert">'.$alert_msg.'</div>';
+}
+
+$page_title = "Freigaben für: " . htmlspecialchars($packing_list['name']);
+require_once 'header.php';
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0">Freigaben für "<?php echo htmlspecialchars($packing_list['name']); ?>" verwalten</h2>
+        <a href="packing_lists.php" class="btn btn-sm btn-outline-light"><i class="fas fa-arrow-left me-2"></i>Zur Übersicht</a>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+        
+        <?php if ($current_user_household_id): ?>
+        <div class="card bg-light mb-5">
+            <div class="card-body">
+                <h5 class="card-title mb-3"><i class="fas fa-users me-2"></i>Freigabe für den Haushalt</h5>
+                <?php if (empty($packing_list['household_id'])): ?>
+                    <p class="text-muted small">Gib diese Packliste für alle Mitglieder deines Haushalts frei. Jedes Mitglied kann sie dann ansehen und bearbeiten.</p>
+                    <form action="share_packing_list.php?id=<?php echo $packing_list_id; ?>" method="post">
+                        <input type="hidden" name="action" value="share_with_household">
+                        <button type="submit" class="btn btn-success"><i class="fas fa-check-circle me-2"></i>Für meinen Haushalt freigeben</button>
+                    </form>
+                <?php else: ?>
+                    <p class="text-success"><i class="fas fa-check-circle me-2"></i>Diese Packliste ist für deinen Haushalt freigegeben.</p>
+                    <form action="share_packing_list.php?id=<?php echo $packing_list_id; ?>" method="post">
+                        <input type="hidden" name="action" value="unshare_from_household">
+                        <button type="submit" class="btn btn-sm btn-outline-danger" onclick="return confirm('Möchten Sie die Freigabe für den Haushalt wirklich aufheben? Die Liste wird dann wieder privat.');"><i class="fas fa-times-circle me-2"></i>Freigabe aufheben</button>
+                    </form>
+                <?php endif; ?>
+            </div>
+        </div>
+        <hr class="my-5">
+        <?php endif; ?>
+
+        <div class="card bg-light mb-5">
+            <div class="card-body">
+                <h5 class="card-title mb-3"><i class="fas fa-link me-2"></i>Anonymer Freigabe-Link (schreibgeschützt)</h5>
+                <p class="text-muted small">Erstelle einen geheimen Link, um die Packliste mit Personen zu teilen, die keinen Account haben. Dieser Link gewährt nur Lesezugriff.</p>
+                <?php if (empty($packing_list['share_token'])): ?>
+                    <form action="share_packing_list.php?id=<?php echo $packing_list_id; ?>" method="post">
+                        <input type="hidden" name="action" value="generate_token">
+                        <button type="submit" class="btn btn-secondary"><i class="fas fa-plus-circle me-2"></i>Geheimen Link erstellen</button>
+                    </form>
+                <?php else: ?>
+                    <label for="share_url" class="form-label">Ihr geheimer Link:</label>
+                    <div class="input-group">
+                        <?php
+                            $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
+                            $host = $_SERVER['HTTP_HOST'];
+                            $path = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
+                            $share_url = $protocol . $host . $path . '/public_list.php?token=' . $packing_list['share_token'];
+                        ?>
+                        <input type="text" id="share_url" class="form-control" value="<?php echo htmlspecialchars($share_url); ?>" readonly>
+                        <button id="copy-btn" class="btn btn-outline-secondary" onclick="copyShareLink(this)" data-bs-toggle="tooltip" title="Link kopieren"><i class="fas fa-copy"></i></button>
+                    </div>
+                    <form action="share_packing_list.php?id=<?php echo $packing_list_id; ?>" method="post" class="mt-2">
+                        <input type="hidden" name="action" value="delete_token">
+                        <button type="submit" class="btn btn-sm btn-outline-danger" onclick="return confirm('Möchten Sie den geheimen Link wirklich dauerhaft deaktivieren?');"><i class="fas fa-trash-alt me-2"></i>Link deaktivieren</button>
+                    </form>
+                <?php endif; ?>
+            </div>
+        </div>
+
+        <hr class="my-5">
+
+        <h5 class="mb-3">Für einzelne Benutzer freigeben</h5>
+        <div class="card bg-light mb-5">
+            <div class="card-body">
+                <form action="share_packing_list.php?id=<?php echo htmlspecialchars($packing_list_id); ?>" method="post" class="row g-3 align-items-end">
+                    <input type="hidden" name="action" value="add_share">
+                    <div class="col-md-5"><label for="shared_with_user_id" class="form-label">Benutzer</label><select class="form-select" id="shared_with_user_id" name="shared_with_user_id" required><option value="" disabled selected>-- Bitte wählen --</option><?php foreach ($all_other_users as $user): ?><option value="<?php echo htmlspecialchars($user['id']); ?>"><?php echo htmlspecialchars($user['username']); ?></option><?php endforeach; ?></select></div>
+                    <div class="col-md-4"><label for="permission_level" class="form-label">Berechtigung</label><select class="form-select" id="permission_level" name="permission_level" required><option value="read">Lesen</option><option value="edit">Bearbeiten</option></select></div>
+                    <div class="col-md-3"><button type="submit" class="btn btn-primary w-100"><i class="fas fa-user-plus me-2"></i>Freigeben</button></div>
+                </form>
+            </div>
+        </div>
+
+        <?php if (!empty($existing_shares)): ?>
+        <h5 class="mb-3 mt-5">Bestehende Einzel-Freigaben</h5>
+            <ul class="list-group">
+                <?php foreach ($existing_shares as $share): ?>
+                    <li class="list-group-item d-flex flex-wrap justify-content-between align-items-center">
+                        <div class="fw-bold"><i class="fas fa-user me-2 text-muted"></i><?php echo htmlspecialchars($share['shared_username']); ?></div>
+                        <div class="d-flex align-items-center mt-2 mt-md-0">
+                            <form action="share_packing_list.php?id=<?php echo htmlspecialchars($packing_list_id); ?>" method="post" class="d-inline-flex me-2">
+                                <input type="hidden" name="action" value="update_share">
+                                <input type="hidden" name="share_id" value="<?php echo htmlspecialchars($share['share_id']); ?>">
+                                <div class="btn-group" role="group">
+                                    <input type="radio" class="btn-check" name="permission_level" id="read_<?php echo $share['share_id']; ?>" value="read" <?php echo ($share['permission_level'] == 'read') ? 'checked' : ''; ?> onchange="this.form.submit()">
+                                    <label class="btn btn-sm btn-outline-secondary" for="read_<?php echo $share['share_id']; ?>">Lesen</label>
+                                    <input type="radio" class="btn-check" name="permission_level" id="edit_<?php echo $share['share_id']; ?>" value="edit" <?php echo ($share['permission_level'] == 'edit') ? 'checked' : ''; ?> onchange="this.form.submit()">
+                                    <label class="btn btn-sm btn-outline-primary" for="edit_<?php echo $share['share_id']; ?>">Bearbeiten</label>
+                                </div>
+                            </form>
+                            <form action="share_packing_list.php?id=<?php echo htmlspecialchars($packing_list_id); ?>" method="post" class="d-inline">
+                                <input type="hidden" name="action" value="delete_share">
+                                <input type="hidden" name="share_id" value="<?php echo htmlspecialchars($share['share_id']); ?>">
+                                <button type="submit" class="btn btn-danger btn-sm" title="Freigabe entfernen" onclick="return confirm('Sind Sie sicher, dass Sie diese Freigabe entfernen möchten?');"><i class="fas fa-trash-alt"></i></button>
+                            </form>
+                        </div>
+                    </li>
+                <?php endforeach; ?>
+            </ul>
+        <?php endif; ?>
+    </div>
+</div>
+
+<script>
+    function copyShareLink(button) {
+        const urlInput = document.getElementById('share_url');
+        if (!navigator.clipboard) {
+            urlInput.select();
+            document.execCommand('copy');
+            alert('Link in die Zwischenablage kopiert!');
+            return;
+        }
+        navigator.clipboard.writeText(urlInput.value).then(function() {
+            const originalIconHTML = button.innerHTML;
+            const originalTitle = button.getAttribute('data-bs-original-title');
+            
+            button.innerHTML = '<i class="fas fa-check text-success"></i>';
+            const tooltip = bootstrap.Tooltip.getInstance(button);
+            if (tooltip) {
+                tooltip.setContent({ '.tooltip-inner': 'Kopiert!' });
+                tooltip.show();
+            }
+            
+            setTimeout(() => {
+                button.innerHTML = originalIconHTML;
+                if (tooltip) {
+                    tooltip.hide();
+                    tooltip.setContent({ '.tooltip-inner': originalTitle });
+                }
+            }, 2000);
+        }, function(err) {
+            alert('Fehler: Der Link konnte nicht kopiert werden.');
+        });
+    }
+</script>
+
+<?php require_once 'footer.php'; ?>

src/storage_locations.php

@@ -0,0 +1,251 @@
+<?php
+// storage_locations.php - Verwaltung für Lagerorte
+// KORREKTUR: Design der Karten-Header für bessere Lesbarkeit repariert.
+
+$page_title = "Lagerorte verwalten";
+
+if (session_status() == PHP_SESSION_NONE) {
+    session_start();
+}
+if (!isset($_SESSION['user_id'])) {
+    header("Location: login.php");
+    exit;
+}
+
+require_once 'db_connect.php';
+require_once 'header.php';
+
+$current_user_id = $_SESSION['user_id'];
+$message = '';
+
+// Lade Haushalts-Mitglieder-IDs, da Orte im Haushalt geteilt werden
+$stmt_household = $conn->prepare("SELECT household_id FROM users WHERE id = ?");
+$stmt_household->bind_param("i", $current_user_id);
+$stmt_household->execute();
+$household_id = $stmt_household->get_result()->fetch_assoc()['household_id'];
+$stmt_household->close();
+
+$household_member_ids = [$current_user_id];
+if ($household_id) {
+    $stmt_members = $conn->prepare("SELECT id FROM users WHERE household_id = ?");
+    $stmt_members->bind_param("i", $household_id);
+    $stmt_members->execute();
+    $result_members = $stmt_members->get_result();
+    while ($row = $result_members->fetch_assoc()) {
+        if (!in_array($row['id'], $household_member_ids)) {
+            $household_member_ids[] = $row['id'];
+        }
+    }
+    $stmt_members->close();
+}
+$placeholders = implode(',', array_fill(0, count($household_member_ids), '?'));
+$types = str_repeat('i', count($household_member_ids));
+
+// Formularverarbeitung
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    // AKTION: ORT HINZUFÜGEN
+    if (isset($_POST['add_location'])) {
+        $name = trim($_POST['name']);
+        $parent_id = !empty($_POST['parent_id']) ? intval($_POST['parent_id']) : NULL;
+        
+        if (!empty($name)) {
+            $stmt = $conn->prepare("INSERT INTO storage_locations (user_id, parent_id, name) VALUES (?, ?, ?)");
+            $stmt->bind_param("iis", $current_user_id, $parent_id, $name);
+            if ($stmt->execute()) {
+                $message = '<div class="alert alert-success">Lagerort erfolgreich hinzugefügt.</div>';
+            } else {
+                $message = '<div class="alert alert-danger">Fehler beim Hinzufügen: ' . $stmt->error . '</div>';
+            }
+            $stmt->close();
+        } else {
+            $message = '<div class="alert alert-danger">Der Name darf nicht leer sein.</div>';
+        }
+    }
+    // AKTION: ORT BEARBEITEN
+    elseif (isset($_POST['edit_location'])) {
+        $name = trim($_POST['edit_name']);
+        $location_id = intval($_POST['location_id']);
+
+        if (!empty($name) && $location_id > 0) {
+            // Jedes Haushaltsmitglied darf bearbeiten, aber die user_id wird nicht geändert
+            $stmt = $conn->prepare("UPDATE storage_locations SET name = ? WHERE id = ? AND user_id IN ($placeholders)");
+            $all_params = array_merge([$name, $location_id], $household_member_ids);
+            $all_types = 'si' . $types;
+            $stmt->bind_param($all_types, ...$all_params);
+            
+            if ($stmt->execute() && $stmt->affected_rows > 0) {
+                $message = '<div class="alert alert-success">Lagerort erfolgreich umbenannt.</div>';
+            } else {
+                $message = '<div class="alert alert-info">Keine Änderung vorgenommen oder keine Berechtigung.</div>';
+            }
+            $stmt->close();
+        } else {
+            $message = '<div class="alert alert-danger">Ungültige Daten zum Bearbeiten.</div>';
+        }
+    }
+}
+// AKTION: ORT LÖSCHEN
+elseif (isset($_GET['action']) && $_GET['action'] == 'delete' && isset($_GET['id'])) {
+    $location_id = intval($_GET['id']);
+
+    $stmt_check = $conn->prepare("SELECT COUNT(*) as child_count FROM storage_locations WHERE parent_id = ?");
+    $stmt_check->bind_param("i", $location_id);
+    $stmt_check->execute();
+    $child_count = $stmt_check->get_result()->fetch_assoc()['child_count'];
+    $stmt_check->close();
+
+    if ($child_count > 0) {
+        $message = '<div class="alert alert-danger">Dieser Ort kann nicht gelöscht werden, da ihm noch Unter-Orte zugeordnet sind. Bitte leere ihn zuerst.</div>';
+    } else {
+        $stmt_delete = $conn->prepare("DELETE FROM storage_locations WHERE id = ? AND user_id IN ($placeholders)");
+        $all_params = array_merge([$location_id], $household_member_ids);
+        $all_types = 'i' . $types;
+        $stmt_delete->bind_param($all_types, ...$all_params);
+        
+        if ($stmt_delete->execute() && $stmt_delete->affected_rows > 0) {
+            $message = '<div class="alert alert-success">Lagerort erfolgreich gelöscht.</div>';
+        } else {
+            $message = '<div class="alert alert-danger">Fehler: Ort nicht gefunden oder keine Berechtigung.</div>';
+        }
+        $stmt_delete->close();
+    }
+}
+
+
+// Lade alle Orte des Haushalts
+$sql = "SELECT sl.id, sl.name, sl.parent_id, sl.user_id FROM storage_locations sl WHERE sl.user_id IN ($placeholders) ORDER BY sl.parent_id ASC, sl.name ASC";
+$stmt_load = $conn->prepare($sql);
+$stmt_load->bind_param($types, ...$household_member_ids);
+$stmt_load->execute();
+$all_locations = $stmt_load->get_result()->fetch_all(MYSQLI_ASSOC);
+$stmt_load->close();
+$conn->close();
+
+// Strukturiere Orte hierarchisch
+$locations_level1 = [];
+$locations_level2 = [];
+foreach ($all_locations as $location) {
+    if ($location['parent_id'] === NULL) {
+        $locations_level1[] = $location;
+    } else {
+        if (!isset($locations_level2[$location['parent_id']])) {
+            $locations_level2[$location['parent_id']] = [];
+        }
+        $locations_level2[$location['parent_id']][] = $location;
+    }
+}
+?>
+
+<div class="card">
+    <div class="card-header d-flex justify-content-between align-items-center">
+        <h2 class="h4 mb-0"><i class="fas fa-archive me-2"></i>Lagerorte verwalten</h2>
+    </div>
+    <div class="card-body p-4">
+        <?php if(!empty($message)) echo $message; ?>
+
+        <div class="card bg-light mb-5">
+            <div class="card-body">
+                <h5 class="card-title mb-3">Neuen Lagerort hinzufügen</h5>
+                <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
+                    <div class="row g-3">
+                        <div class="col-md-5">
+                            <label for="name" class="form-label">Name des Ortes</label>
+                            <input type="text" class="form-control" id="name" name="name" placeholder="z.B. Keller, Schrank, Box #3" required>
+                        </div>
+                        <div class="col-md-5">
+                            <label for="parent_id" class="form-label">Untergeordnet zu (Ebene 2)</label>
+                            <select class="form-select" id="parent_id" name="parent_id">
+                                <option value="">-- Keine (neue Ebene 1) --</option>
+                                <?php foreach ($locations_level1 as $loc1): ?>
+                                    <option value="<?php echo $loc1['id']; ?>"><?php echo htmlspecialchars($loc1['name']); ?></option>
+                                <?php endforeach; ?>
+                            </select>
+                        </div>
+                        <div class="col-md-2 d-flex align-items-end">
+                            <button type="submit" name="add_location" class="btn btn-primary w-100"><i class="fas fa-plus-circle me-2"></i>Hinzufügen</button>
+                        </div>
+                    </div>
+                </form>
+            </div>
+        </div>
+
+        <h5 class="mb-3">Bestehende Lagerorte</h5>
+        <?php if (empty($locations_level1)): ?>
+            <div class="alert alert-info text-center">Noch keine Lagerorte erstellt.</div>
+        <?php else: ?>
+            <div class="row g-3">
+                <?php foreach ($locations_level1 as $loc1): ?>
+                    <div class="col-md-6">
+                        <div class="card level-1-card h-100">
+                            <div class="card-header d-flex justify-content-between align-items-center">
+                                <h6 class="mb-0"><i class="fas fa-box-open me-2"></i><?php echo htmlspecialchars($loc1['name']); ?></h6>
+                                <div class="btn-group">
+                                    <button type="button" class="btn btn-sm btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editLocationModal" data-id="<?php echo $loc1['id']; ?>" data-name="<?php echo htmlspecialchars($loc1['name']); ?>"><i class="fas fa-edit"></i></button>
+                                    <a href="storage_locations.php?action=delete&id=<?php echo $loc1['id']; ?>" class="btn btn-sm btn-outline-danger" onclick="return confirm('Sicher, dass du diesen Ort löschen willst?');"><i class="fas fa-trash"></i></a>
+                                </div>
+                            </div>
+                            <div class="card-body">
+                                <?php if (isset($locations_level2[$loc1['id']])): ?>
+                                    <ul class="list-group level-2-list">
+                                    <?php foreach ($locations_level2[$loc1['id']] as $loc2): ?>
+                                        <li class="list-group-item d-flex justify-content-between align-items-center">
+                                            <span><i class="fas fa-long-arrow-alt-right me-2 text-muted"></i><?php echo htmlspecialchars($loc2['name']); ?></span>
+                                            <div class="btn-group">
+                                                <button type="button" class="btn btn-sm btn-outline-primary py-0 px-1" data-bs-toggle="modal" data-bs-target="#editLocationModal" data-id="<?php echo $loc2['id']; ?>" data-name="<?php echo htmlspecialchars($loc2['name']); ?>"><i class="fas fa-edit"></i></button>
+                                                <a href="storage_locations.php?action=delete&id=<?php echo $loc2['id']; ?>" class="btn btn-sm btn-outline-danger py-0 px-1" onclick="return confirm('Sicher, dass du diesen Unter-Ort löschen willst?');"><i class="fas fa-trash"></i></a>
+                                            </div>
+                                        </li>
+                                    <?php endforeach; ?>
+                                    </ul>
+                                <?php else: ?>
+                                    <p class="text-muted small text-center">Noch keine Unter-Ebenen vorhanden.</p>
+                                <?php endif; ?>
+                            </div>
+                        </div>
+                    </div>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </div>
+</div>
+
+<div class="modal fade" id="editLocationModal" tabindex="-1" aria-labelledby="editLocationModalLabel" aria-hidden="true">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title" id="editLocationModalLabel">Lagerort umbenennen</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+            </div>
+            <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
+                <div class="modal-body">
+                    <input type="hidden" name="location_id" id="edit_location_id">
+                    <div class="mb-3">
+                        <label for="edit_name" class="form-label">Neuer Name</label>
+                        <input type="text" class="form-control" id="edit_name" name="edit_name" required>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
+                    <button type="submit" name="edit_location" class="btn btn-primary">Speichern</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
+
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    var editLocationModal = document.getElementById('editLocationModal');
+    if (editLocationModal) {
+        editLocationModal.addEventListener('show.bs.modal', function (event) {
+            var button = event.relatedTarget;
+            var locationId = button.getAttribute('data-id');
+            var locationName = button.getAttribute('data-name');
+            editLocationModal.querySelector('#edit_location_id').value = locationId;
+            editLocationModal.querySelector('#edit_name').value = locationName;
+        });
+    }
+});
+</script>
+
+<?php require_once 'footer.php'; ?>