fix of the json upload format

Web/app.py

@@ -11850,37 +11850,40 @@ def test_push_notification():
         return jsonify({'success': False}), 500
 
 
-@app.route('/batch_upload', methods=['GET'])
-def batch_upload_page():
-    """
-    Serves the HTML frontend for the batch CSV and image upload.
-    """
-    # Check permissions if necessary, similar to your other routes
-    if 'username' not in session:
-        flash('Bitte melden Sie sich an.', 'error')
-        return redirect(url_for('login'))
-
-    return render_template('upload_batch.html')
-
 
 def clean_db_field(val):
-    """Bereinigt Werte, die fälschlicherweise als String-Listen aus der CSV kommen."""
+    """Bereinigt Werte, die fälschlicherweise als String-Listen oder mit Klammern aus der CSV kommen."""
+    import ast
     import pandas as pd
+
     if not val or pd.isna(val):
         return None
 
     val_str = str(val).strip()
 
-    # Erkennt und entpackt String-Listen wie "['100465']" oder '["100465"]'
-    if (val_str.startswith("['") and val_str.endswith("']")) or (val_str.startswith('["') and val_str.endswith('"]')):
-        inner = val_str[2:-2].strip()
-        return inner if inner and inner != "''" and inner != '""' else None
+    # Wenn es wie eine Liste aussieht (z.B. "['100177']" oder "['']")
+    if val_str.startswith("[") and val_str.endswith("]"):
+        try:
+            parsed = ast.literal_eval(val_str)
+            if isinstance(parsed, list):
+                # Nimm das erste Element der Liste, wenn vorhanden
+                for item in parsed:
+                    cleaned_item = str(item).strip()
+                    if cleaned_item and cleaned_item not in ("", "''", '""', "None", "nan"):
+                        return cleaned_item
+                return None
+        except Exception:
+            # Fallback bei Syntaxfehlern
+            inner = val_str[1:-1].strip().replace("'", "").replace('"', '')
+            return inner if inner and inner not in ("''", '""') else None
 
-    if val_str in ("[]", "['']", '[""]', "nan", "None"):
+    if val_str in ("[]", "['']", '[""]', "nan", "None", "''", '""'):
         return None
 
     return val_str
 
+
+
 @app.route('/upload_csv_batch', methods=['POST'])
 def upload_csv_batch():
     """
@@ -12064,8 +12067,10 @@ def upload_csv_batch():
 
             reservierbar = bool(row.get('Reservierbar', False))
 
-            # Code_4 Behandlung
-            row_code = clean_db_field(row.get('Code_4', ''))
+            # Code_4 / Barcode sauber extrahieren und bereinigen
+            raw_code = row.get('Code_4') or row.get('Barcode') or ''
+            row_code = clean_db_field(raw_code)
+
             if row_code:
                 unique_code = row_code
             elif item_count > 1: