feat(mobile-app): 授权申请弹窗支持省市选择器

- 市团队和省团队申请弹窗使用 city_pickers 选择省市
- 默认选中本地存储的省市（来自认种时的选择）
- 允许用户重新选择省市
- 社区申请保持只输入社区名称（无省市选择）

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/mobile-app/lib/features/authorization/presentation/pages/authorization_apply_page.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import 'package:image_picker/image_picker.dart';
+import 'package:city_pickers/city_pickers.dart';
 import '../../../../core/di/injection_container.dart';
 import '../../../../core/services/authorization_service.dart';
 
@@ -207,39 +208,62 @@ class _AuthorizationApplyPageState
   }
 
   /// 显示授权确认弹窗
-  Future<bool?> _showAuthorizationConfirmDialog(AuthorizationType type) {
+  /// 返回 Map 包含确认状态和选择的省市信息
+  Future<Map<String, dynamic>?> _showAuthorizationConfirmDialog(AuthorizationType type) {
     String title;
-    String locationInfo;
-    String? additionalField;
 
     switch (type) {
       case AuthorizationType.community:
         title = '申请社区授权';
-        locationInfo = '请输入您的社区名称';
-        additionalField = 'community';
         break;
       case AuthorizationType.cityTeam:
         title = '申请市团队授权';
-        if (_savedCityName == null || _savedCityCode == null) {
-          _showErrorSnackBar('未找到认种时保存的城市信息，请先完成认种');
-          return Future.value(false);
-        }
-        locationInfo = '城市: $_savedCityName';
         break;
       case AuthorizationType.provinceTeam:
         title = '申请省团队授权';
-        if (_savedProvinceName == null || _savedProvinceCode == null) {
-          _showErrorSnackBar('未找到认种时保存的省份信息，请先完成认种');
-          return Future.value(false);
-        }
-        locationInfo = '省份: $_savedProvinceName';
         break;
     }
 
-    return showDialog<bool>(
+    // 初始化弹窗内的临时变量（使用本地存储的值作为默认值）
+    String? tempProvinceName = _savedProvinceName;
+    String? tempProvinceCode = _savedProvinceCode;
+    String? tempCityName = _savedCityName;
+    String? tempCityCode = _savedCityCode;
+
+    return showDialog<Map<String, dynamic>>(
       context: context,
       barrierDismissible: true,
-      builder: (context) => AlertDialog(
+      builder: (dialogContext) => StatefulBuilder(
+        builder: (context, setDialogState) {
+          // 显示省市选择器
+          Future<void> showLocationPicker() async {
+            final result = await CityPickers.showCityPicker(
+              context: context,
+              cancelWidget: const Text(
+                '取消',
+                style: TextStyle(color: Color(0xFF745D43), fontSize: 16),
+              ),
+              confirmWidget: const Text(
+                '确定',
+                style: TextStyle(color: Color(0xFFD4AF37), fontSize: 16, fontWeight: FontWeight.w600),
+              ),
+              height: 300,
+              showType: ShowType.pc, // 只显示省市两级
+              barrierDismissible: true,
+              locationCode: tempCityCode ?? tempProvinceCode, // 默认选中保存的位置
+            );
+
+            if (result != null) {
+              setDialogState(() {
+                tempProvinceName = result.provinceName;
+                tempProvinceCode = result.provinceId;
+                tempCityName = result.cityName;
+                tempCityCode = result.cityId;
+              });
+            }
+          }
+
+          return AlertDialog(
             shape: RoundedRectangleBorder(
               borderRadius: BorderRadius.circular(16),
             ),
@@ -255,7 +279,7 @@ class _AuthorizationApplyPageState
               mainAxisSize: MainAxisSize.min,
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-            if (additionalField == 'community') ...[
+                if (type == AuthorizationType.community) ...[
                   const Text(
                     '社区名称',
                     style: TextStyle(
@@ -284,34 +308,83 @@ class _AuthorizationApplyPageState
                     ),
                   ),
                 ] else ...[
-              Container(
+                  // 省市选择区域
+                  Text(
+                    type == AuthorizationType.cityTeam ? '选择城市' : '选择省份',
+                    style: const TextStyle(
+                      fontSize: 14,
+                      fontWeight: FontWeight.w500,
+                      color: Color(0xFF745D43),
+                    ),
+                  ),
+                  const SizedBox(height: 8),
+                  GestureDetector(
+                    onTap: showLocationPicker,
+                    child: Container(
                       width: double.infinity,
                       padding: const EdgeInsets.all(16),
                       decoration: BoxDecoration(
                         color: const Color(0xFFFFF5E6),
                         borderRadius: BorderRadius.circular(8),
-                  border: Border.all(color: const Color(0x33D4AF37)),
+                        border: Border.all(color: const Color(0x4DD4AF37)),
                       ),
+                      child: Row(
+                        children: [
+                          Expanded(
                             child: Column(
                               crossAxisAlignment: CrossAxisAlignment.start,
                               children: [
+                                if (type == AuthorizationType.cityTeam) ...[
                                   Text(
-                      locationInfo,
+                                    tempCityName ?? '请选择城市',
-                      style: const TextStyle(
+                                    style: TextStyle(
                                       fontSize: 16,
                                       fontWeight: FontWeight.w600,
-                        color: Color(0xFF5D4037),
+                                      color: tempCityName != null
+                                          ? const Color(0xFF5D4037)
+                                          : const Color(0xFF5D4037).withOpacity(0.5),
                                     ),
                                   ),
-                    const SizedBox(height: 8),
+                                  if (tempProvinceName != null) ...[
+                                    const SizedBox(height: 4),
                                     Text(
-                      '此信息来自您认种时的选择，不可修改',
+                                      tempProvinceName!,
                                       style: TextStyle(
                                         fontSize: 12,
                                         color: const Color(0xFF745D43).withOpacity(0.7),
                                       ),
                                     ),
                                   ],
+                                ] else ...[
+                                  Text(
+                                    tempProvinceName ?? '请选择省份',
+                                    style: TextStyle(
+                                      fontSize: 16,
+                                      fontWeight: FontWeight.w600,
+                                      color: tempProvinceName != null
+                                          ? const Color(0xFF5D4037)
+                                          : const Color(0xFF5D4037).withOpacity(0.5),
+                                    ),
+                                  ),
+                                ],
+                              ],
+                            ),
+                          ),
+                          const Icon(
+                            Icons.keyboard_arrow_down,
+                            color: Color(0xFFD4AF37),
+                            size: 24,
+                          ),
+                        ],
+                      ),
+                    ),
+                  ),
+                  const SizedBox(height: 8),
+                  Text(
+                    '点击可重新选择省市',
+                    style: TextStyle(
+                      fontSize: 12,
+                      color: const Color(0xFF745D43).withOpacity(0.6),
                     ),
                   ),
                 ],
@@ -327,7 +400,7 @@ class _AuthorizationApplyPageState
             ),
             actions: [
               TextButton(
-            onPressed: () => Navigator.of(context).pop(false),
+                onPressed: () => Navigator.of(dialogContext).pop(null),
                 child: const Text(
                   '取消',
                   style: TextStyle(color: Color(0xFF745D43)),
@@ -335,7 +408,7 @@ class _AuthorizationApplyPageState
               ),
               ElevatedButton(
                 onPressed: () {
-              if (additionalField == 'community') {
+                  if (type == AuthorizationType.community) {
                     if (_communityNameController.text.trim().isEmpty) {
                       ScaffoldMessenger.of(context).showSnackBar(
                         const SnackBar(
@@ -345,8 +418,35 @@ class _AuthorizationApplyPageState
                       );
                       return;
                     }
+                  } else if (type == AuthorizationType.cityTeam) {
+                    if (tempCityCode == null || tempCityName == null) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(
+                          content: Text('请选择城市'),
+                          backgroundColor: Colors.red,
+                        ),
+                      );
+                      return;
                     }
-              Navigator.of(context).pop(true);
+                  } else if (type == AuthorizationType.provinceTeam) {
+                    if (tempProvinceCode == null || tempProvinceName == null) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(
+                          content: Text('请选择省份'),
+                          backgroundColor: Colors.red,
+                        ),
+                      );
+                      return;
+                    }
+                  }
+
+                  Navigator.of(dialogContext).pop({
+                    'confirmed': true,
+                    'provinceName': tempProvinceName,
+                    'provinceCode': tempProvinceCode,
+                    'cityName': tempCityName,
+                    'cityCode': tempCityCode,
+                  });
                 },
                 style: ElevatedButton.styleFrom(
                   backgroundColor: const Color(0xFFD4AF37),
@@ -360,6 +460,8 @@ class _AuthorizationApplyPageState
                 ),
               ),
             ],
+          );
+        },
       ),
     );
   }
@@ -395,8 +497,8 @@ class _AuthorizationApplyPageState
     }
 
     // 显示确认弹窗
-    final confirmed = await _showAuthorizationConfirmDialog(_selectedType!);
+    final dialogResult = await _showAuthorizationConfirmDialog(_selectedType!);
-    if (confirmed != true) {
+    if (dialogResult == null || dialogResult['confirmed'] != true) {
       return;
     }
 
@@ -419,6 +521,7 @@ class _AuthorizationApplyPageState
       }
 
       // 2. 将 AuthorizationType 转换为 SelfApplyAuthorizationType
+      // 从弹窗返回结果中获取省市信息
       SelfApplyAuthorizationType selfApplyType;
       String? communityName;
       String? provinceCode;
@@ -433,13 +536,13 @@ class _AuthorizationApplyPageState
           break;
         case AuthorizationType.cityTeam:
           selfApplyType = SelfApplyAuthorizationType.cityTeam;
-          cityCode = _savedCityCode;
+          cityCode = dialogResult['cityCode'] as String?;
-          cityName = _savedCityName;
+          cityName = dialogResult['cityName'] as String?;
           break;
         case AuthorizationType.provinceTeam:
           selfApplyType = SelfApplyAuthorizationType.provinceTeam;
-          provinceCode = _savedProvinceCode;
+          provinceCode = dialogResult['provinceCode'] as String?;
-          provinceName = _savedProvinceName;
+          provinceName = dialogResult['provinceName'] as String?;
           break;
       }