Fix download service init when anime dir not configured

src/server/fastapi_app.py

@@ -113,11 +113,21 @@ async def lifespan(app: FastAPI):
         progress_service.subscribe("progress_updated", progress_event_handler)
 
         # Initialize download service and restore queue from database
+        # Only if anime directory is configured
         try:
+            from src.server.config.settings import settings
+
             from src.server.utils.dependencies import get_download_service
-            download_service = get_download_service()
-            await download_service.initialize()
-            logger.info("Download service initialized and queue restored")
+            
+            if settings.anime_directory:
+                download_service = get_download_service()
+                await download_service.initialize()
+                logger.info("Download service initialized and queue restored")
+            else:
+                logger.info(
+                    "Download service initialization skipped - "
+                    "anime directory not configured"
+                )
         except Exception as e:
             logger.warning("Failed to initialize download service: %s", e)
             # Continue startup - download service can be initialized later