feat: complete huihui square avatar workflows

backend/app/main.py

@@ -6,7 +6,9 @@ from contextlib import asynccontextmanager
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse
+from fastapi.staticfiles import StaticFiles
 import re as _re
+from pathlib import Path
 
 # 修复 Pydantic v2 把 naive datetime 序列化为 +00:00 的问题
 # 数据库存的是北京时间，应标记为 +08:00
@@ -89,6 +91,10 @@ app.add_middleware(
 # 注册路由
 app.include_router(router, prefix="/api")
 
+uploads_dir = Path(__file__).resolve().parent / "uploads"
+uploads_dir.mkdir(parents=True, exist_ok=True)
+app.mount("/api/uploads", StaticFiles(directory=uploads_dir), name="uploads")
+
 
 @app.get("/health")
 async def health_check():