fix: Correct type hint for user_info in StaffMobileOTPLoginResponse and adjust router definition placement

app/system_users/controllers/router.py

@@ -1,3 +1,4 @@
+
 from pydantic import BaseModel, Field
 
 # --- Staff Mobile OTP Login ---
@@ -9,7 +10,7 @@ class StaffMobileOTPLoginResponse(BaseModel):
     access_token: str
     token_type: str = "bearer"
     expires_in: int
-    user_info: UserInfoResponse
+    user_info: 'UserInfoResponse'
 
 @router.post("/staff/login/mobile-otp", response_model=StaffMobileOTPLoginResponse, summary="Staff login with mobile and OTP")
 async def staff_login_mobile_otp(
@@ -57,6 +58,7 @@ from typing import List, Optional
 from fastapi import APIRouter, Depends, HTTPException, status, Request
 from fastapi.security import HTTPAuthorizationCredentials
 
+
 from app.system_users.services.service import SystemUserService
 from app.core.config import settings
 from app.system_users.schemas.schema import (
@@ -84,6 +86,7 @@ from app.core.logging import get_logger
 
 logger = get_logger(__name__)
 
+# Move router definition above its first usage
 router = APIRouter(
     prefix="/auth",
     tags=["Authentication & User Management"]