Fix: got data from backend

app.py

@@ -5,6 +5,7 @@ This replaces the monolithic app.py with a clean, maintainable structure
 using dependency injection and singleton managers.
 """
 import logging
+import os
 from contextlib import asynccontextmanager
 from fastapi import FastAPI, WebSocket, HTTPException
 from fastapi.responses import Response
@@ -91,6 +92,14 @@ async def lifespan(app: FastAPI):
         camera_manager.clear_all()
         pipeline_manager.clear_all()
         
+        # Clear model cache files on disk
+        import shutil
+        from detector_worker.core.config import MODELS_DIR
+        if os.path.exists(MODELS_DIR):
+            logger.info(f"Clearing model cache directory: {MODELS_DIR}")
+            shutil.rmtree(MODELS_DIR)
+            logger.info("Model cache directory cleared")
+        
         # Clear dependency container singletons
         container.get_container().clear_singletons()