Remove auto-installer from installed system

- Add cleanup code to remove auto-installer.sh from target system
- Remove installation log file from target system
- Exclude auto-installer log from rsync copy (but keep script for installation)
- Auto-installer now self-destructs after successful installation
- Keeps installed system clean by removing installation artifacts

config/includes.chroot/usr/local/bin/auto-installer.sh

@@ -521,6 +521,7 @@ copy_live_system() {
         --exclude=/cdrom \
         --exclude=/var/cache/apt/archives/*.deb \
         --exclude=/var/log/* \
+        --exclude=/var/log/auto-installer.log \
         / "$TARGET_MOUNT/"
     
     print_status "Live system copied successfully"
@@ -659,7 +660,12 @@ run_post_install() {
 # Cleanup and unmount
 cleanup() {
     print_header "Installation Complete"
-    
+
+    # Remove auto-installer from installed system (cleanup)
+    print_status "Removing auto-installer from installed system..."
+    rm -f "$TARGET_MOUNT/usr/local/bin/auto-installer.sh" 2>/dev/null || true
+    rm -f "$TARGET_MOUNT/var/log/auto-installer.log" 2>/dev/null || true
+
     print_status "Unmounting filesystems..."
     umount "$TARGET_MOUNT/dev/pts" 2>/dev/null || true
     umount "$TARGET_MOUNT/dev" 2>/dev/null || true