完善移动端登录密码必填校验

apps/user_app/lib/ui/features/auth/login_page.dart

@@ -1,5 +1,5 @@
 // 功能描述：提供用户端手机号密码登录界面及本地输入校验。
-// 版本：1.1.0
+// 版本：1.2.0
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 
@@ -30,9 +30,12 @@ class _LoginPageState extends State<LoginPage> {
 
   final _phone = TextEditingController();
   final _password = TextEditingController();
+  final _phoneFocus = FocusNode();
+  final _passwordFocus = FocusNode();
   bool _submitting = false;
   String? _error;
   String? _phoneError;
+  String? _passwordError;
   bool _obscurePassword = true;
 
   @override
@@ -47,23 +50,31 @@ class _LoginPageState extends State<LoginPage> {
   void dispose() {
     _phone.dispose();
     _password.dispose();
+    _phoneFocus.dispose();
+    _passwordFocus.dispose();
     super.dispose();
   }
 
-  /// 校验手机号并提交登录请求。
+  /// 校验手机号和密码，通过后再提交登录请求。
   Future<void> _login() async {
     final phone = _phone.text.trim();
-    if (!_phonePattern.hasMatch(phone)) {
+    final phoneValid = _phonePattern.hasMatch(phone);
+    final passwordValid = _password.text.isNotEmpty;
+    if (!phoneValid || !passwordValid) {
       setState(() {
-        _phoneError = '请输入正确的11位手机号';
+        _phoneError = phoneValid ? null : '请输入正确的11位手机号';
+        _passwordError = passwordValid ? null : '请输入密码';
         _error = null;
       });
+      // 聚焦第一个无效字段，便于键盘和辅助技术用户立即修正。
+      (phoneValid ? _passwordFocus : _phoneFocus).requestFocus();
       return;
     }
 
     setState(() {
       _submitting = true;
       _phoneError = null;
+      _passwordError = null;
       _error = null;
     });
     try {
@@ -123,10 +134,16 @@ class _LoginPageState extends State<LoginPage> {
                 const SizedBox(height: 40),
                 TextField(
                   controller: _phone,
+                  focusNode: _phoneFocus,
                   keyboardType: TextInputType.phone,
                   autofillHints: const [AutofillHints.telephoneNumber],
                   onChanged: (_) {
-                    if (_phoneError != null) setState(() => _phoneError = null);
+                    if (_phoneError != null || _error != null) {
+                      setState(() {
+                        _phoneError = null;
+                        _error = null;
+                      });
+                    }
                   },
                   decoration: InputDecoration(
                     labelText: '手机号',
@@ -137,12 +154,22 @@ class _LoginPageState extends State<LoginPage> {
                 const SizedBox(height: 14),
                 TextField(
                   controller: _password,
+                  focusNode: _passwordFocus,
                   obscureText: _obscurePassword,
                   autofillHints: const [AutofillHints.password],
+                  onChanged: (_) {
+                    if (_passwordError != null || _error != null) {
+                      setState(() {
+                        _passwordError = null;
+                        _error = null;
+                      });
+                    }
+                  },
                   onSubmitted: (_) => _submitting ? null : _login(),
                   decoration: InputDecoration(
                     labelText: '密码',
                     prefixIcon: const Icon(Icons.lock_outline),
+                    errorText: _passwordError,
                     suffixIcon: IconButton(
                       tooltip: _obscurePassword ? '显示密码' : '隐藏密码',
                       onPressed: () => setState(() => _obscurePassword = !_obscurePassword),