Bug fixing fehlende oder Fehlerhafte Module korrigiert

backend/app.py

@@ -1,14 +1,19 @@
-from flask import Flask, send_from_directory, redirect
 import os
+import sys
+if __name__ != '__main__':
+    import sys
+    sys.path.append(os.path.dirname(__file__))
 
+from flask import Flask, send_from_directory, redirect
 from util.logger import logger
 from util.db_config import is_configured, load_config, test_connection
-from util.setup_routes import setup_blueprint
+from setup_routes import setup_blueprint
 from auth import auth_bp
 from tools import md5_blueprint
 
 app = Flask(__name__, template_folder="templates")
 
+
 # 📦 Blueprints registrieren
 app.register_blueprint(setup_blueprint)
 app.register_blueprint(auth_bp)