fix: Fehlerbehandlung beim Erstellen von Verzeichnissen verbessert und Kopierstatus aktualisiert

app.py

@@ -649,7 +649,16 @@ def do_copy(src_dev, dst_dev, cfg):
                 return
             rel   = f.relative_to(src_path)
             dst_f = dst_dir / rel
-            dst_f.parent.mkdir(parents=True, exist_ok=True)
+            try:
+                dst_f.parent.mkdir(parents=True, exist_ok=True)
+            except OSError as mkdir_err:
+                io_errors += 1
+                add_log(f'⚠ Verzeichnis nicht erstellbar ({dst_f.parent.name}): {mkdir_err}')
+                with copy_lock:
+                    copy_state.update(done=i+1,
+                                      progress=int((i+1)/total*100) if total else 100,
+                                      current=str(f.name))
+                continue
 
             if dst_f.exists():
                 if dup_mode == 'skip':
@@ -794,7 +803,7 @@ def check_auto_copy():
     if not cfg.get('auto_copy') or not cfg.get('source_port') or not cfg.get('dest_port'):
         return
     with copy_lock:
-        if copy_state['running']:
+        if copy_state['running'] or copy_state['error']:
             return
     devs = usb_devices()
     src = next((d for d in devs if d['usb_port'] == cfg['source_port']), None)