feat(auth): add auth middleware

- refactored chat routes to use request.user instead of doing authentication in every route

backend/apps/web/main.py

@@ -1,8 +1,9 @@
-from fastapi import FastAPI, Request, Depends, HTTPException
+from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
-
+from starlette.middleware.authentication import AuthenticationMiddleware
 from apps.web.routers import auths, users, chats, modelfiles, utils
 from config import WEBUI_VERSION, WEBUI_AUTH
+from apps.web.middlewares.auth import BearerTokenAuthBackend, on_auth_error
 
 app = FastAPI()
 
@@ -18,11 +19,12 @@ app.add_middleware(
 
 
 app.include_router(auths.router, prefix="/auths", tags=["auths"])
+
+app.add_middleware(AuthenticationMiddleware, backend=BearerTokenAuthBackend(), on_error=on_auth_error)
+
 app.include_router(users.router, prefix="/users", tags=["users"])
 app.include_router(chats.router, prefix="/chats", tags=["chats"])
 app.include_router(modelfiles.router, prefix="/modelfiles", tags=["modelfiles"])
-
-
 app.include_router(utils.router, prefix="/utils", tags=["utils"])