feat: 添加前端静态文件服务

backend/app/main.py

@@ -1,5 +1,7 @@
 from fastapi import FastAPI, Depends, HTTPException, BackgroundTasks
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.future import select
 from typing import List
@@ -1140,3 +1142,25 @@ async def update_ai_config(config: LLMConfig):
         "provider": config.provider,
         "requires_restart": True
     }
+
+
+# 前端静态文件服务
+FRONTEND_DIR = Path(__file__).parent.parent / "frontend" / "dist"
+
+@app.get("/")
+async def serve_frontend():
+    """服务前端首页"""
+    index_path = FRONTEND_DIR / "index.html"
+    if index_path.exists():
+        return FileResponse(index_path)
+    return {"message": "Frontend not found", "frontend_dir": str(FRONTEND_DIR)}
+
+@app.get("/{path:path}")
+async def serve_frontend_paths(path: str):
+    """服务前端其他路由"""
+    # 先尝试直接文件
+    file_path = FRONTEND_DIR / path
+    if file_path.exists() and file_path.is_file():
+        return FileResponse(file_path)
+    # 回退到 index.html (SPA 路由)
+    return FileResponse(FRONTEND_DIR / "index.html")