feat(verification): add user identity verification system

Add comprehensive user verification feature including:
- VerificationGuideScreen: Guide screen explaining the verification process
- VerificationFormScreen: Form for submitting verification applications
- VerificationSettingsScreen: Settings page to view verification status
- verificationService: API service for verification operations
- verificationStore: State management for verification state
- DTOs: Types for verification records, status, and admin operations

The system supports multiple identity types (student, teacher, staff, alumni, external)
and includes both user-facing and admin-facing functionality.

src/screens/profile/SettingsScreen.tsx

@@ -52,6 +52,7 @@ const SETTINGS_GROUPS_BASE = [
     icon: 'shield-check-outline',
     items: [
       { key: 'edit_profile', title: '编辑资料', icon: 'account-edit-outline', showArrow: true },
+      { key: 'verification', title: '身份认证', icon: 'check-decagram', showArrow: true, subtitle: '获得认证标识，解锁更多功能' },
       { key: 'privacy', title: '隐私设置', icon: 'shield-account-outline', showArrow: true },
       { key: 'security', title: '账号安全', icon: 'lock-outline', showArrow: true },
       { key: 'blocked_users', title: '黑名单', icon: 'account-off-outline', showArrow: true },
@@ -252,6 +253,9 @@ export const SettingsScreen: React.FC = () => {
       case 'edit_profile':
         router.push(hrefs.hrefProfileEdit());
         break;
+      case 'verification':
+        router.push('/profile/verification');
+        break;
       case 'notification_settings':
         router.push(hrefs.hrefProfileNotifications());
         break;