fix: type fixes

Author: martastain

backend/api/init/init_request.py

@@ -48,7 +48,7 @@ class InitResponseModel(ResponseModel):
             description="Is the login background image enabled?",
             default_factory=is_login_background_enabled,
         ),
-    ]
+    ] = False
 
     user: Annotated[
         UserModel | None,

backend/server/server.py

@@ -10,7 +10,7 @@
 from fastapi.websockets import WebSocket, WebSocketDisconnect
 
 import nebula
-from nebula.exceptions import NebulaException
+from nebula.exceptions import NebulaException, NotFoundException
 from nebula.plugins.frontend import get_frontend_plugins
 from nebula.settings import load_settings
 from server.endpoints import install_endpoints
@@ -174,13 +174,14 @@ async def ws_endpoint(websocket: WebSocket) -> None:
 # API endpoints and the frontend
 #
 
+
 @app.get("/api/login-background.jpg")
 def login_background() -> FileResponse:
     """Serve the login background image."""
     img_path = f"/mnt/{nebula.config.site_name}_01/.nx/login-background.jpg"
     if os.path.exists(img_path):
         return FileResponse(img_path, media_type="image/jpeg")
-    return JSONResponse(status_code=404, content={"detail": "File not found"})
+    raise NotFoundException("Login background image not found")
 
 
 def install_frontend_plugins(app: FastAPI) -> None: