kit初版，模型引入,agent优化

art-agent/backend/app/main.py

@@ -2,15 +2,15 @@ import os
 from pathlib import Path
 
 from dotenv import load_dotenv
+load_dotenv(override=True)
+
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
 
 from app.api.chat import router as chat_router
 
-load_dotenv()
-
-app = FastAPI(title="Art Agent MVP")
+app = FastAPI(title="EPEEKit API")
 
 app.add_middleware(
     CORSMiddleware,