📚 Improved code organization and structure in backend modules 🚧🔧

backend/app.py

@@ -246,7 +246,7 @@ def get_environment_type():
 # Windows-spezifische Fixes
 if os.name == 'nt':
     try:
-        from utils.windows_fixes import get_windows_thread_manager
+        from utils.core_system import get_windows_thread_manager
         print("[OK] Windows-Fixes (sichere Version) geladen")
     except ImportError as e:
         get_windows_thread_manager = None
@@ -259,7 +259,7 @@ from models import init_database, create_initial_admin, User, get_db_session
 from utils.logging_config import setup_logging, get_logger, log_startup_info
 from utils.job_scheduler import JobScheduler, get_job_scheduler
 from utils.queue_manager import start_queue_manager, stop_queue_manager
-from utils.settings import SECRET_KEY, SESSION_LIFETIME
+from utils.utilities_collection import SECRET_KEY, SESSION_LIFETIME
 
 # Blueprints importieren
 from blueprints.auth import auth_blueprint
@@ -377,7 +377,7 @@ def apply_production_config(app):
     app_logger.info("[PRODUCTION] Aktiviere Production-Konfiguration für Mercedes-Benz TBA")
     
     # Dynamische Werte setzen
-    from utils.settings import SECRET_KEY, SESSION_LIFETIME
+    from utils.utilities_collection import SECRET_KEY, SESSION_LIFETIME
     ProductionConfig.SECRET_KEY = os.environ.get('SECRET_KEY') or SECRET_KEY
     ProductionConfig.PERMANENT_SESSION_LIFETIME = SESSION_LIFETIME
     
@@ -431,7 +431,7 @@ def apply_development_config(app):
     app_logger.info("[DEVELOPMENT] Aktiviere Development-Konfiguration")
     
     # Dynamische Werte setzen
-    from utils.settings import SECRET_KEY, SESSION_LIFETIME
+    from utils.utilities_collection import SECRET_KEY, SESSION_LIFETIME
     DevelopmentConfig.SECRET_KEY = os.environ.get('SECRET_KEY') or SECRET_KEY
     DevelopmentConfig.PERMANENT_SESSION_LIFETIME = SESSION_LIFETIME