chore: remove debug code and restore phone authorization as required

- Remove debug register page entry and console.log from login
- Remove phone skip option, phone authorization is mandatory
- Restore incomplete registration check (no phone → redirect to register)

miniprogram/pages/login/login.wxml

@@ -17,8 +17,5 @@
     </button>
 
     <view class="agreement" bindtap="onAgreement">登录即表示同意《用户协议》和《隐私政策》</view>
-
-    <!-- 临时调试入口，上线前删除 -->
-    <view class="debug-entry" bindtap="onDebugRegister">[ 调试 ] 进入注册页</view>
   </view>
 </view>