merge(invite): 客户端邀请奖励 UI 轨(Task 11-13)并入

invite api/provider + invite页真实化(邀请区+战绩+TG任务卡,六语) + 注册页邀请码输入。
客户端并行轨,文件与后端不相交,SDD 逐任务评审全过。

client/lib/l10n/app_text.dart

@@ -603,6 +603,15 @@ abstract class AppText {
   String get inviteRewardFirstBuy; // 好友首购 · 双方各得 15 天 / First purchase · +15 days each
   String get inviteRewardJoinTg;   // 加入 TG 频道 · 得 3 天 / Join TG · +3 days
   String get inviteProgressTitle;  // 我的奖励 / My rewards
+  String get inviteTasksTitle;       // 更多得会员 / More ways to earn
+  String get inviteJoinTgTitle;      // 加入 Telegram 频道 +3 天 / Join Telegram channel
+  String get inviteJoinTgBtn;        // 加入频道 / Join channel
+  String get inviteVerifyBtn;        // 验证领取 / Verify & claim
+  String get inviteTaskDone;         // 已领 +3 天 / Claimed +3 days
+  String get inviteStatInvited;      // 已邀请 / Invited
+  String get inviteStatConverted;    // 已转化 / Converted
+  String get inviteStatDays;         // 累计获赠(天) / Days earned
+  String get inviteCodeFieldLabel;   // 邀请码(选填) / Invite code (optional)
   // ── 通知(Spec ③占位) ──
   String get notifTitle;           // 通知 / Notifications
   String get notifEmpty;           // 暂无通知 / No notifications

client/lib/l10n/strings_en.dart

@@ -494,6 +494,24 @@ class StringsEn extends AppText {
   @override
   String get inviteProgressTitle => 'My rewards';
   @override
+  String get inviteTasksTitle => 'More ways to earn';
+  @override
+  String get inviteJoinTgTitle => 'Join Telegram channel';
+  @override
+  String get inviteJoinTgBtn => 'Join channel';
+  @override
+  String get inviteVerifyBtn => 'Verify & claim';
+  @override
+  String get inviteTaskDone => 'Claimed +3 days';
+  @override
+  String get inviteStatInvited => 'Invited';
+  @override
+  String get inviteStatConverted => 'Converted';
+  @override
+  String get inviteStatDays => 'Days earned';
+  @override
+  String get inviteCodeFieldLabel => 'Invite code (optional)';
+  @override
   String get notifTitle => 'Notifications';
   @override
   String get notifEmpty => 'No notifications';

client/lib/l10n/strings_es.dart

@@ -495,6 +495,24 @@ class StringsEs extends AppText {
   @override
   String get inviteProgressTitle => 'Mis recompensas';
   @override
+  String get inviteTasksTitle => 'Más formas de ganar';
+  @override
+  String get inviteJoinTgTitle => 'Unirse al canal de Telegram';
+  @override
+  String get inviteJoinTgBtn => 'Unirse al canal';
+  @override
+  String get inviteVerifyBtn => 'Verificar y reclamar';
+  @override
+  String get inviteTaskDone => 'Reclamado +3 días';
+  @override
+  String get inviteStatInvited => 'Invitados';
+  @override
+  String get inviteStatConverted => 'Convertidos';
+  @override
+  String get inviteStatDays => 'Días acumulados';
+  @override
+  String get inviteCodeFieldLabel => 'Código de invitación (opcional)';
+  @override
   String get notifTitle => 'Notificaciones';
   @override
   String get notifEmpty => 'Aún no hay notificaciones';

client/lib/l10n/strings_ja.dart

@@ -495,6 +495,24 @@ class StringsJa extends AppText {
   @override
   String get inviteProgressTitle => '獲得した特典';
   @override
+  String get inviteTasksTitle => 'もっと会員特典を得る';
+  @override
+  String get inviteJoinTgTitle => 'Telegramチャンネルに参加';
+  @override
+  String get inviteJoinTgBtn => 'チャンネルに参加';
+  @override
+  String get inviteVerifyBtn => '確認して受け取る';
+  @override
+  String get inviteTaskDone => '受け取り済み +3日';
+  @override
+  String get inviteStatInvited => '招待した人数';
+  @override
+  String get inviteStatConverted => '転換した人数';
+  @override
+  String get inviteStatDays => '累計獲得日数';
+  @override
+  String get inviteCodeFieldLabel => '招待コード(任意)';
+  @override
   String get notifTitle => '通知';
   @override
   String get notifEmpty => '通知はありません';

client/lib/l10n/strings_ko.dart

@@ -495,6 +495,24 @@ class StringsKo extends AppText {
   @override
   String get inviteProgressTitle => '내 보상';
   @override
+  String get inviteTasksTitle => '더 많은 혜택 받기';
+  @override
+  String get inviteJoinTgTitle => 'Telegram 채널 가입';
+  @override
+  String get inviteJoinTgBtn => '채널 가입';
+  @override
+  String get inviteVerifyBtn => '확인하고 받기';
+  @override
+  String get inviteTaskDone => '수령 완료 +3일';
+  @override
+  String get inviteStatInvited => '초대 수';
+  @override
+  String get inviteStatConverted => '전환 수';
+  @override
+  String get inviteStatDays => '누적 획득(일)';
+  @override
+  String get inviteCodeFieldLabel => '초대 코드(선택)';
+  @override
   String get notifTitle => '알림';
   @override
   String get notifEmpty => '알림이 없습니다';

client/lib/l10n/strings_ru.dart

@@ -495,6 +495,24 @@ class StringsRu extends AppText {
   @override
   String get inviteProgressTitle => 'Мои награды';
   @override
+  String get inviteTasksTitle => 'Больше способов заработать';
+  @override
+  String get inviteJoinTgTitle => 'Вступить в Telegram-канал';
+  @override
+  String get inviteJoinTgBtn => 'Вступить в канал';
+  @override
+  String get inviteVerifyBtn => 'Проверить и получить';
+  @override
+  String get inviteTaskDone => 'Получено +3 дня';
+  @override
+  String get inviteStatInvited => 'Приглашено';
+  @override
+  String get inviteStatConverted => 'Конвертировано';
+  @override
+  String get inviteStatDays => 'Всего получено (дней)';
+  @override
+  String get inviteCodeFieldLabel => 'Код приглашения (необязательно)';
+  @override
   String get notifTitle => 'Уведомления';
   @override
   String get notifEmpty => 'Пока нет уведомлений';

client/lib/l10n/strings_zh.dart

@@ -488,6 +488,24 @@ class StringsZh extends AppText {
   @override
   String get inviteProgressTitle => '我的奖励';
   @override
+  String get inviteTasksTitle => '更多得会员';
+  @override
+  String get inviteJoinTgTitle => '加入 Telegram 频道';
+  @override
+  String get inviteJoinTgBtn => '加入频道';
+  @override
+  String get inviteVerifyBtn => '验证领取';
+  @override
+  String get inviteTaskDone => '已领 +3 天';
+  @override
+  String get inviteStatInvited => '已邀请';
+  @override
+  String get inviteStatConverted => '已转化';
+  @override
+  String get inviteStatDays => '累计获赠(天)';
+  @override
+  String get inviteCodeFieldLabel => '邀请码(选填)';
+  @override
   String get notifTitle => '通知';
   @override
   String get notifEmpty => '暂无通知';

client/lib/screens/invite_page.dart

@@ -1,17 +1,20 @@
-// invite_page.dart — 邀请好友(占位屏)
+// invite_page.dart — 邀请好友:邀请区(码/链接)+ 战绩 + TG 任务卡。
 //
-// TODO(spec-2): 邀请码/链接由后端签发,奖励进度来自 /v1/invite。当前码/链接/奖励进度
-// 均为静态占位,仅供 IA 走查——接后端前不接任何真实业务逻辑。
+// 数据来自 inviteProvider(Task 11,`/v1/invite`);未登录/加载/出错回退占位文案,
+// 不接任何静态 demo 数据。
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 import '../l10n/app_text.dart';
 import '../pangolin_theme.dart';
+import '../services/channel_launch.dart';
+import '../services/invite_api.dart';
+import '../state/invite_provider.dart';
+import '../widgets/pangolin_button.dart';
 import '../widgets/pangolin_icons.dart';
-
-const String _kDemoInviteCode = 'PANGOLIN-DEMO';
-const String _kDemoInviteLink = 'https://pangolin.app/i/PANGOLIN-DEMO';
+import '../widgets/pangolin_toast.dart';
 
 class InviteScreen extends ConsumerWidget {
   const InviteScreen({super.key, required this.t, this.onBack, this.embedded = false});
@@ -30,29 +33,113 @@ class InviteScreen extends ConsumerWidget {
     }
   }
 
+  // 验证领取:拉 deep_link 后外部打开。canLaunchUrl + try-catch 双保险,
+  // 失败给可见 toast(与 payment_page._openRedirectUrl 同法)。
+  Future<void> _verifyAndClaim(BuildContext context, WidgetRef ref) async {
+    try {
+      final link = await ref.read(inviteApiProvider).telegramStartLink();
+      final uri = link.isEmpty ? null : Uri.tryParse(link);
+      if (uri == null) {
+        if (context.mounted) showPangolinToast(context, t.lang.loadFailedRetry);
+        return;
+      }
+      final can = await canLaunchUrl(uri);
+      if (!can) {
+        if (context.mounted) showPangolinToast(context, t.lang.loadFailedRetry);
+        return;
+      }
+      final ok = await launchUrl(uri, mode: LaunchMode.externalApplication);
+      if (!ok && context.mounted) showPangolinToast(context, t.lang.loadFailedRetry);
+      if (ok) await ref.read(inviteProvider.notifier).refresh();
+    } catch (_) {
+      if (context.mounted) showPangolinToast(context, t.lang.loadFailedRetry);
+    }
+  }
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final c = context.pangolin;
+    final inviteAsync = ref.watch(inviteProvider);
 
-    Widget body = ListView(
+    Widget body = inviteAsync.when(
+      loading: () => const Center(child: CircularProgressIndicator()),
+      error: (_, __) => _Placeholder(t: t),
+      data: (info) => info == null
+          ? _Placeholder(t: t)
+          : _InviteContent(t: t, info: info, onCopy: _copy, onVerifyAndClaim: (ctx) => _verifyAndClaim(ctx, ref)),
+    );
+
+    if (embedded) return body;
+    return Scaffold(
+      backgroundColor: c.bg,
+      body: SafeArea(
+        child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
+          Padding(
+            padding: const EdgeInsets.fromLTRB(8, 6, 16, 10),
+            child: Row(children: [
+              IconButton(
+                onPressed: onBack ?? () => Navigator.of(context).maybePop(),
+                icon: Icon(PangolinIcons.arrowLeft, size: 22, color: c.fg1),
+              ),
+              Text(t.inviteTitle, style: PangolinText.h3.copyWith(color: c.fg1, fontWeight: FontWeight.w700)),
+            ]),
+          ),
+          Expanded(child: body),
+        ]),
+      ),
+    );
+  }
+}
+
+/// loading/error/未登录 的统一回退占位(保留原 IA 走查态)。
+class _Placeholder extends StatelessWidget {
+  const _Placeholder({required this.t});
+  final AppText t;
+  @override
+  Widget build(BuildContext context) {
+    final c = context.pangolin;
+    return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(24),
+        child: Column(mainAxisSize: MainAxisSize.min, children: [
+          Icon(PangolinIcons.gift, size: 26, color: c.fg3),
+          const SizedBox(height: 10),
+          Text('—', style: PangolinText.body.copyWith(color: c.fg3)),
+        ]),
+      ),
+    );
+  }
+}
+
+class _InviteContent extends StatelessWidget {
+  const _InviteContent({required this.t, required this.info, required this.onCopy, required this.onVerifyAndClaim});
+  final AppText t;
+  final InviteInfo info;
+  final Future<void> Function(BuildContext, String, String) onCopy;
+  final Future<void> Function(BuildContext) onVerifyAndClaim;
+
+  @override
+  Widget build(BuildContext context) {
+    final c = context.pangolin;
+    return ListView(
       padding: const EdgeInsets.fromLTRB(20, 4, 20, 24),
       children: [
         _CopyCard(
           icon: PangolinIcons.gift,
           label: t.inviteCodeLabel,
-          value: _kDemoInviteCode,
+          value: info.code,
           mono: true,
           copyLabel: t.inviteCopyCode,
-          onCopy: () => _copy(context, _kDemoInviteCode, t.copied),
+          onCopy: () => onCopy(context, info.code, t.copied),
         ),
         const SizedBox(height: 14),
         _CopyCard(
           icon: PangolinIcons.link,
           label: t.inviteLinkLabel,
-          value: _kDemoInviteLink,
+          value: info.link,
           mono: false,
           copyLabel: t.inviteCopyLink,
-          onCopy: () => _copy(context, _kDemoInviteLink, t.copied),
+          onCopy: () => onCopy(context, info.link, t.copied),
         ),
         const SizedBox(height: 20),
         Padding(
@@ -82,44 +169,120 @@ class InviteScreen extends ConsumerWidget {
         ),
         Container(
           width: double.infinity,
-          padding: const EdgeInsets.all(24),
           decoration: BoxDecoration(
             color: c.surface,
             borderRadius: BorderRadius.circular(PangolinRadius.lg),
             border: Border.all(color: c.border),
             boxShadow: PangolinShadow.sm,
           ),
-          child: Column(children: [
-            Icon(PangolinIcons.gift, size: 26, color: c.fg3),
-            const SizedBox(height: 10),
-            Text('—', style: PangolinText.body.copyWith(color: c.fg3)),
+          child: Row(children: [
+            _StatCell(value: '${info.invited}', label: t.inviteStatInvited),
+            _StatDivider(color: c.border),
+            _StatCell(value: '${info.converted}', label: t.inviteStatConverted),
+            _StatDivider(color: c.border),
+            _StatCell(value: '${info.earnedDays}', label: t.inviteStatDays),
           ]),
         ),
+        if (info.tgEnabled) ...[
+          const SizedBox(height: 20),
+          Padding(
+            padding: const EdgeInsets.fromLTRB(2, 0, 2, 10),
+            child: Text(t.inviteTasksTitle, style: PangolinText.sm.copyWith(color: c.fg2, fontWeight: FontWeight.w700, fontSize: 13)),
+          ),
+          _TgTaskCard(t: t, info: info, onVerifyAndClaim: onVerifyAndClaim),
+        ],
       ],
     );
+  }
+}
 
-    if (embedded) return body;
-    return Scaffold(
-      backgroundColor: c.bg,
-      body: SafeArea(
-        child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
-          Padding(
-            padding: const EdgeInsets.fromLTRB(8, 6, 16, 10),
-            child: Row(children: [
-              IconButton(
-                onPressed: onBack ?? () => Navigator.of(context).maybePop(),
-                icon: Icon(PangolinIcons.arrowLeft, size: 22, color: c.fg1),
-              ),
-              Text(t.inviteTitle, style: PangolinText.h3.copyWith(color: c.fg1, fontWeight: FontWeight.w700)),
-            ]),
-          ),
-          Expanded(child: body),
+class _StatCell extends StatelessWidget {
+  const _StatCell({required this.value, required this.label});
+  final String value;
+  final String label;
+  @override
+  Widget build(BuildContext context) {
+    final c = context.pangolin;
+    return Expanded(
+      child: Padding(
+        padding: const EdgeInsets.symmetric(vertical: 18),
+        child: Column(children: [
+          Text(value, style: PangolinText.h3.copyWith(color: c.fg1, fontWeight: FontWeight.w700)),
+          const SizedBox(height: 4),
+          Text(label, style: PangolinText.caption.copyWith(color: c.fg3)),
         ]),
       ),
     );
   }
 }
 
+class _StatDivider extends StatelessWidget {
+  const _StatDivider({required this.color});
+  final Color color;
+  @override
+  Widget build(BuildContext context) => SizedBox(height: 48, child: VerticalDivider(width: 1, color: color));
+}
+
+class _TgTaskCard extends StatelessWidget {
+  const _TgTaskCard({required this.t, required this.info, required this.onVerifyAndClaim});
+  final AppText t;
+  final InviteInfo info;
+  final Future<void> Function(BuildContext) onVerifyAndClaim;
+
+  @override
+  Widget build(BuildContext context) {
+    final c = context.pangolin;
+    return Container(
+      padding: const EdgeInsets.all(18),
+      decoration: BoxDecoration(
+        color: c.surface,
+        borderRadius: BorderRadius.circular(PangolinRadius.xl),
+        border: Border.all(color: c.border),
+        boxShadow: PangolinShadow.sm,
+      ),
+      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
+        Row(children: [
+          Container(
+            width: 32, height: 32,
+            decoration: BoxDecoration(color: c.accentSubtle, borderRadius: BorderRadius.circular(PangolinRadius.sm)),
+            child: Icon(PangolinIcons.send, size: 17, color: c.accent),
+          ),
+          const SizedBox(width: 10),
+          Expanded(
+            child: Text(t.inviteJoinTgTitle,
+                style: PangolinText.sm.copyWith(color: c.fg1, fontWeight: FontWeight.w700, fontSize: 13.5)),
+          ),
+        ]),
+        const SizedBox(height: 14),
+        if (info.tgJoined)
+          PangolinButton(
+            label: t.inviteTaskDone,
+            icon: PangolinIcons.checkCircle,
+            variant: PangolinButtonVariant.secondary,
+            expand: true,
+            onPressed: null,
+          )
+        else
+          Column(children: [
+            PangolinButton(
+              label: t.inviteJoinTgBtn,
+              variant: PangolinButtonVariant.secondary,
+              expand: true,
+              onPressed: () => launchChannel(info.channel),
+            ),
+            const SizedBox(height: 10),
+            PangolinButton(
+              label: t.inviteVerifyBtn,
+              variant: PangolinButtonVariant.primary,
+              expand: true,
+              onPressed: () => onVerifyAndClaim(context),
+            ),
+          ]),
+      ]),
+    );
+  }
+}
+
 class _CopyCard extends StatelessWidget {
   const _CopyCard({
     required this.icon,

client/lib/services/auth_api.dart

@@ -115,12 +115,14 @@ class AuthApi {
     required String code,
     required String password,
     Map<String, dynamic>? device,
+    String? inviteCode,
   }) async {
     final resp = await _post('/v1/auth/register', {
       'email': email,
       'code': code,
       'password': password,
       if (device != null) 'device': device,
+      if (inviteCode != null && inviteCode.isNotEmpty) 'invite_code': inviteCode,
     });
     if (resp.statusCode != 200 && resp.statusCode != 201) {
       _throwFromResponse(resp);

client/lib/services/invite_api.dart

@@ -0,0 +1,35 @@
+// invite_api.dart — 邀请/奖励任务代理端点封装(JWT 经 ApiClient 自动注入)。
+import 'api_client.dart';
+
+class InviteInfo {
+  const InviteInfo({
+    required this.code, required this.link, required this.invited,
+    required this.converted, required this.earnedDays,
+    required this.tgEnabled, required this.tgJoined, required this.channel,
+  });
+  final String code, link, channel;
+  final int invited, converted, earnedDays;
+  final bool tgEnabled, tgJoined;
+
+  factory InviteInfo.fromJson(Map<String, dynamic> j) {
+    final tg = (j['telegram'] as Map<String, dynamic>?) ?? const {};
+    return InviteInfo(
+      code: j['invite_code'] as String? ?? '',
+      link: j['invite_link'] as String? ?? '',
+      invited: (j['invited'] as num?)?.toInt() ?? 0,
+      converted: (j['converted'] as num?)?.toInt() ?? 0,
+      earnedDays: (j['earned_days'] as num?)?.toInt() ?? 0,
+      tgEnabled: tg['enabled'] as bool? ?? false,
+      tgJoined: tg['joined'] as bool? ?? false,
+      channel: tg['channel'] as String? ?? '',
+    );
+  }
+}
+
+class InviteApi {
+  InviteApi(this._c);
+  final ApiClient _c;
+  Future<InviteInfo> fetch() async => InviteInfo.fromJson(await _c.getJson('/v1/invite'));
+  Future<String> telegramStartLink() async =>
+      (await _c.getJson('/v1/tasks/telegram/start'))['deep_link'] as String? ?? '';
+}

client/lib/state/invite_provider.dart

@@ -0,0 +1,25 @@
+// invite_provider.dart — 邀请信息状态装配:复用 apiClientProvider,未登录不打网络。
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../services/invite_api.dart';
+import 'account_providers.dart';
+import 'auth_provider.dart';
+
+final inviteApiProvider = Provider<InviteApi>((ref) => InviteApi(ref.watch(apiClientProvider)));
+
+class InviteNotifier extends AsyncNotifier<InviteInfo?> {
+  @override
+  Future<InviteInfo?> build() async {
+    // 未登录返回 null(不打网络);已登录拉取。
+    final token = ref.watch(authProvider).accessToken;
+    if (token == null || token.isEmpty) return null;
+    return ref.read(inviteApiProvider).fetch();
+  }
+
+  Future<void> refresh() async {
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(() => ref.read(inviteApiProvider).fetch());
+  }
+}
+
+final inviteProvider = AsyncNotifierProvider<InviteNotifier, InviteInfo?>(InviteNotifier.new);

client/lib/widgets/auth_screen.dart

@@ -24,10 +24,14 @@ const _easeOut = Cubic(0.22, 1, 0.36, 1);
 enum _AuthMode { login, register }
 
 class AuthScreen extends ConsumerStatefulWidget {
-  const AuthScreen({super.key, required this.onDone, required this.t});
+  const AuthScreen({super.key, required this.onDone, required this.t, this.api});
   final VoidCallback onDone;
   final AppText t;
 
+  /// 测试可注入(见 test/widget/auth_invite_field_test.dart);生产不传,内部
+  /// 用 kApiBaseUrl 现建一个,行为不变。
+  final AuthApi? api;
+
   @override
   ConsumerState<AuthScreen> createState() => _AuthScreenState();
 }
@@ -44,6 +48,7 @@ class _AuthScreenState extends ConsumerState<AuthScreen>
   final _email = TextEditingController();
   final _code = TextEditingController();
   final _pw = TextEditingController();
+  final _invite = TextEditingController();
 
   final _emailFocus = FocusNode();
   final _pwFocus = FocusNode();
@@ -54,7 +59,7 @@ class _AuthScreenState extends ConsumerState<AuthScreen>
     duration: const Duration(milliseconds: 620),
   );
 
-  late final AuthApi _api = AuthApi(baseUrl: kApiBaseUrl);
+  late final AuthApi _api = widget.api ?? AuthApi(baseUrl: kApiBaseUrl);
 
   bool get _emailValid => RegExp(r'\S+@\S+\.\S+').hasMatch(_email.text);
 
@@ -79,6 +84,7 @@ class _AuthScreenState extends ConsumerState<AuthScreen>
     _email.dispose();
     _code.dispose();
     _pw.dispose();
+    _invite.dispose();
     _emailFocus.dispose();
     _pwFocus.dispose();
     _codeFocus.dispose();
@@ -108,6 +114,7 @@ class _AuthScreenState extends ConsumerState<AuthScreen>
         code: _code.text.trim(),
         password: _pw.text,
         device: device,
+        inviteCode: _invite.text.trim(),
       );
       await ref.read(tokenStoreProvider).saveLastEmail(_email.text.trim());
       await ref.read(authProvider.notifier).saveTokens(tokens);
@@ -464,6 +471,11 @@ class _AuthScreenState extends ConsumerState<AuthScreen>
       ),
       const SizedBox(height: 16),
       _field(c, icon: PangolinIcons.lock, label: t.pwLabel, focused: _pwFocus.hasFocus, child: _pwInput(c, t.setPwPh, onSubmit: _submitRegister)),
+      const SizedBox(height: 16),
+      _field(c, icon: PangolinIcons.gift, label: t.inviteCodeFieldLabel, focused: false,
+          child: TextField(key: const Key('invite-code-field'), controller: _invite,
+              textInputAction: TextInputAction.done,
+              decoration: _bare.copyWith(hintText: ''))),
       const SizedBox(height: 18),
       _primaryBtn(c, label: _loading ? '...' : t.doCreate,
           onPressed: (!_loading && _pw.text.length >= 6) ? _doRegister : null),

client/test/unit/invite_api_test.dart

@@ -0,0 +1,24 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart';
+import 'package:pangolin_vpn/services/api_client.dart';
+import 'package:pangolin_vpn/services/invite_api.dart';
+
+ApiClient _c(MockClient m) => ApiClient(baseUrl: 'http://x', getToken: () => 't', refresh: () async => false, client: m);
+
+void main() {
+  test('fetch 解析邀请信息 + TG 任务态', () async {
+    final api = InviteApi(_c(MockClient((req) async {
+      expect(req.url.path, '/v1/invite');
+      return http.Response('{"invite_code":"ABCD2345","invite_link":"https://x/i/ABCD2345",'
+          '"invited":3,"converted":1,"earned_days":16,'
+          '"telegram":{"enabled":true,"joined":false,"channel":"@pangolin_app"}}', 200);
+    })));
+    final info = await api.fetch();
+    expect(info.code, 'ABCD2345');
+    expect(info.invited, 3);
+    expect(info.earnedDays, 16);
+    expect(info.tgEnabled, true);
+    expect(info.tgJoined, false);
+  });
+}

client/test/widget/auth_invite_field_test.dart

@@ -0,0 +1,103 @@
+// auth_invite_field_test.dart — Task 13: 注册页「邀请码(选填)」输入框
+//
+// 驱动路径:切到注册 tab(step0)→ 填邮箱 → 点发送验证码(mock 网络 204)→
+// 填 6 位验证码 → 点下一步(进 step1 设密码步)→ 断言 step1 渲染出
+// key 为 invite-code-field 的 TextField,label 为 t.inviteCodeFieldLabel。
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/testing.dart';
+import 'package:pangolin_vpn/l10n/strings_zh.dart';
+import 'package:pangolin_vpn/pangolin_theme.dart';
+import 'package:pangolin_vpn/services/auth_api.dart';
+import 'package:pangolin_vpn/services/token_store.dart';
+import 'package:pangolin_vpn/state/auth_provider.dart';
+import 'package:pangolin_vpn/widgets/auth_screen.dart';
+
+import '../helpers/harness.dart';
+
+class _NullTokenStore implements TokenStore {
+  const _NullTokenStore();
+  @override
+  Future<void> saveTokens({required String access, required String refresh}) async {}
+  @override
+  Future<String?> loadAccessToken() async => null;
+  @override
+  Future<String?> loadRefreshToken() async => null;
+  @override
+  Future<void> clear() async {}
+  @override
+  Future<void> markOnboarded() async {}
+  @override
+  Future<bool> isOnboarded() async => true;
+  @override
+  Future<void> saveLastEmail(String email) async {}
+  @override
+  Future<String?> loadLastEmail() async => null;
+}
+
+void main() {
+  setUpAll(disableGoogleFontsFetching);
+  const t = StringsZh();
+
+  Future<void> _driveToRegisterStep1(WidgetTester tester) async {
+    final mockClient = MockClient((req) async {
+      if (req.method == 'POST' && req.url.path == '/v1/auth/code') {
+        return http.Response('', 204);
+      }
+      return http.Response(jsonEncode({'message_zh': 'unexpected'}), 404);
+    });
+    final api = AuthApi(baseUrl: 'http://test.invalid', client: mockClient);
+
+    await tester.pumpWidget(ProviderScope(
+      overrides: [tokenStoreProvider.overrideWithValue(const _NullTokenStore())],
+      child: MaterialApp(
+        debugShowCheckedModeBanner: false,
+        theme: PangolinTheme.light,
+        home: AuthScreen(t: t, onDone: () {}, api: api),
+      ),
+    ));
+    await tester.pumpAndSettle();
+
+    // 切到注册 tab。
+    await tester.tap(find.text(t.tabRegister));
+    await tester.pumpAndSettle();
+
+    // step0:填邮箱 → 点发送验证码(mock 204)。
+    await tester.enterText(find.byType(TextField).first, 'invitee@example.com');
+    await tester.pump();
+    await tester.tap(find.text(t.sendCode));
+    await tester.pumpAndSettle();
+
+    // 填 6 位验证码 → 下一步,进 step1。
+    await tester.enterText(find.byType(TextField).at(1), '123456');
+    await tester.pump();
+    await tester.tap(find.text(t.doNext));
+    await tester.pumpAndSettle();
+  }
+
+  testWidgets('注册 step1(设密码步)渲染邀请码(选填)输入框', (tester) async {
+    await _driveToRegisterStep1(tester);
+
+    expect(find.byKey(const Key('invite-code-field')), findsOneWidget);
+    expect(find.text(t.inviteCodeFieldLabel), findsOneWidget);
+  });
+
+  testWidgets('登录路径不含邀请码输入框', (tester) async {
+    final api = AuthApi(baseUrl: 'http://test.invalid', client: MockClient((req) async => http.Response('', 404)));
+    await tester.pumpWidget(ProviderScope(
+      overrides: [tokenStoreProvider.overrideWithValue(const _NullTokenStore())],
+      child: MaterialApp(
+        debugShowCheckedModeBanner: false,
+        theme: PangolinTheme.light,
+        home: AuthScreen(t: t, onDone: () {}, api: api),
+      ),
+    ));
+    await tester.pumpAndSettle();
+
+    expect(find.byKey(const Key('invite-code-field')), findsNothing);
+  });
+}

client/test/widget/invite_page_test.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pangolin_vpn/l10n/strings_en.dart';
+import 'package:pangolin_vpn/screens/invite_page.dart';
+import 'package:pangolin_vpn/services/invite_api.dart';
+import 'package:pangolin_vpn/state/invite_provider.dart';
+
+import '../helpers/harness.dart';
+
+void main() {
+  testWidgets('邀请页显示真实码 + 战绩 + TG 任务卡', (tester) async {
+    const info = InviteInfo(code: 'ABCD2345', link: 'https://x/i/ABCD2345',
+        invited: 3, converted: 1, earnedDays: 16, tgEnabled: true, tgJoined: false, channel: '@pangolin_app');
+    await tester.binding.setSurfaceSize(const Size(400, 1200));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+    await tester.pumpWidget(wrapThemed(
+      InviteScreen(t: StringsEn()),
+      overrides: [inviteProvider.overrideWith(() => _FakeNotifier(info))],
+    ));
+    await tester.pumpAndSettle();
+    expect(find.text('ABCD2345'), findsOneWidget);
+    expect(find.text('Join channel'), findsOneWidget); // TG 任务卡
+  });
+}
+
+class _FakeNotifier extends InviteNotifier {
+  _FakeNotifier(this._v);
+  final InviteInfo _v;
+  @override
+  Future<InviteInfo?> build() async => _v;
+}