fix: remove duplicate _inject_user from main.py, use the one from rbac module

dashboard/backend/main.py

@@ -9,7 +9,7 @@ from slowapi.errors import RateLimitExceeded
 from routers import docker_router, gitea, files, terminal, system, auth, chat_summary, security, passkey, totp, litellm, cc_connect, info_engine, opc_tasks, opc_agents, opc_ws, opc_projects
 import auth as auth_module
 import config
-from rbac import require_page
+from rbac import require_page, _inject_user
 
 import asyncio
 import httpx
@@ -164,11 +164,6 @@ def _router_reachable():
     except Exception:
         return False
 
-# Dependency to store user in request.state for rbac dependencies
-async def _inject_user(request: Request, user = Depends(auth_module.get_current_user)):
-    request.state.user = user
-    return user
-
 # Public auth endpoints
 app.include_router(auth.router, prefix="/api/auth", tags=["auth"])
 app.include_router(passkey.router, prefix="/api/auth", tags=["passkey"])