feat(mobile-app): 暂时隐藏自助申请授权页面的"省团队"选项

- 在 _buildAuthorizationTypes() 方法中过滤掉 AuthorizationType.provinceTeam
- 现在"自助申请授权"页面只显示"社区"和"市团队"两个选项
- 原代码以注释形式保留，方便未来需要时快速恢复
- 相关枚举和后端逻辑保持不变，仅前端UI隐藏

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

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

@@ -854,6 +854,11 @@ class _AuthorizationApplyPageState
 
   /// 构建授权类型选择
   Widget _buildAuthorizationTypes() {
+    // 暂时隐藏省团队申请选项，未来需要时取消注释恢复
+    final availableTypes = AuthorizationType.values
+        .where((type) => type != AuthorizationType.provinceTeam)
+        .toList();
+
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
@@ -867,7 +872,8 @@ class _AuthorizationApplyPageState
           ),
         ),
         const SizedBox(height: 12),
-        ...AuthorizationType.values.map((type) => _buildTypeItem(type)),
+        // 原代码: ...AuthorizationType.values.map((type) => _buildTypeItem(type)),
+        ...availableTypes.map((type) => _buildTypeItem(type)),
       ],
     );
   }