Fix minio localhost public URL by proxying through backend

backend/storage.py

@@ -74,7 +74,7 @@ def upload_file(file_content: bytes, object_name: str, content_type: str = "appl
         
         # Construct public URL (from browser's point of view, it connects to localhost:9000)
         # We can resolve this dynamically by returning a path like /api/uploads/ or direct localhost:9000 link
-        public_url = f"http://localhost:9000/{MINIO_BUCKET}/{object_name}"
+        public_url = f"/api/storage/{MINIO_BUCKET}/{object_name}"
         logger.info(f"Successfully uploaded {object_name} to Minio. URL: {public_url}")
         return public_url
     except Exception as e: