beautified some ui

sentence_api/main.py

@@ -22,6 +22,7 @@ from fastapi import (
 from fastapi.responses import FileResponse, Response
 from fastapi.staticfiles import StaticFiles
 from starlette.concurrency import run_in_threadpool
+from starlette.requests import ClientDisconnect
 
 from .assessment import AssessmentService
 from .audio_metrics import AudioAnalysisError
@@ -96,6 +97,14 @@ def create_app(
     if static_dir.is_dir():
         application.mount("/static", StaticFiles(directory=static_dir), name="static")
 
+    @application.exception_handler(ClientDisconnect)
+    async def handle_client_disconnect(request: Request, exc: ClientDisconnect) -> Response:
+        logger.warning(
+            "Upload interrupted: the client or an intermediate proxy closed the "
+            "connection before the request body completed."
+        )
+        return Response(status_code=400, content="Upload connection was interrupted.")
+
     def require_admin(x_admin_key: Optional[str] = Header(default=None)) -> None:
         expected = service_settings.admin_api_key
         if expected and not hmac.compare_digest(x_admin_key or "", expected):