Remove Scrypt support, fix app import, add rebuild script for SHA256

rebuild_sha.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Rebuild cgminer strictly for SHA256 (Gridseed)
+
+if [ "$EUID" -ne 0 ]; then
+  echo "Bitte als root ausführen."
+  exit 1
+fi
+
+echo "=== Stoppe Miner ==="
+systemctl stop necrohash-miner
+
+echo "=== Bereinige alte Build-Dateien ==="
+cd /tmp
+rm -rf cgminer-gc3355
+
+echo "=== Clone dtbartle/cgminer-gc3355 ==="
+git clone https://github.com/dtbartle/cgminer-gc3355.git
+cd cgminer-gc3355
+
+echo "=== Konfiguriere Build (SHA256 Only) ==="
+export CFLAGS="-fcommon -O2"
+if [ -f "./autogen.sh" ]; then
+    ./autogen.sh
+else
+    autoreconf -ivf
+fi
+
+# WICHTIG: --disable-scrypt explizit setzen (obwohl default oft disable ist, aber hier sichergehen)
+# Und --enable-gridseed
+./configure --enable-gridseed --disable-scrypt --without-curses
+
+echo "=== Kompiliere... (Das dauert ca. 5-10 Minuten) ==="
+make -j1
+
+echo "=== Installiere ==="
+make install
+
+echo "=== Fertig ==="
+echo "Starte Miner neu..."
+systemctl start necrohash-miner