fix issue

app/main.py

@@ -15,7 +15,7 @@ from typing import AsyncGenerator
 
 from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.responses import FileResponse, JSONResponse, RedirectResponse
+from fastapi.responses import FileResponse, JSONResponse, RedirectResponse, Response
 
 from app.config import settings
 from app.database import close_db, init_db
@@ -201,6 +201,12 @@ async def serve_image(image_name: str):
 
 # ──────────────────────────── 前端页面 ────────────────────────────
 
+@app.get("/favicon.ico", include_in_schema=False)
+async def favicon():
+    """返回空响应，避免浏览器 404 报错"""
+    return Response(status_code=204)
+
+
 @app.get("/", tags=["前端"])
 async def index():
     """返回前端管理页面"""