feat: 会员 provider（状态/套餐/下单/轮询/领奖）

lib/features/member/member_provider.dart

@@ -1,4 +1,10 @@
-/// 会员 provider：Task 1 仅含权益文案纯函数（Task 2 将补全状态/套餐/下单/轮询/领奖）
+import 'dart:convert';
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../core/auth/auth_provider.dart';
+
+/// 会员 provider：会员状态/套餐/下单/轮询/领奖
 class MemberInfo {
   final bool isVip;
   final String expireAt;
@@ -11,6 +17,13 @@ class MemberInfo {
     required this.planName,
     required this.benefits,
   });
+
+  factory MemberInfo.fromJson(Map<String, dynamic> e) => MemberInfo(
+        isVip: e['is_vip'] as bool? ?? false,
+        expireAt: e['expire_at'] as String? ?? '',
+        planName: e['plan_name'] as String? ?? '',
+        benefits: (e['benefits'] as List<dynamic>? ?? []).cast<String>(),
+      );
 }
 
 /// 权益 key → 文案
@@ -23,3 +36,98 @@ const benefitLabels = {
 
 List<String> benefitTexts(MemberInfo m) =>
     m.benefits.map((b) => benefitLabels[b] ?? b).toList();
+
+class MemberNotifier extends AsyncNotifier<MemberInfo> {
+  @override
+  Future<MemberInfo> build() async {
+    final api = ref.read(apiClientProvider);
+    final data = await api.get<Map<String, dynamic>>('/member/status');
+    return MemberInfo.fromJson(data);
+  }
+
+  Future<void> refresh() async {
+    state = await AsyncValue.guard(build);
+  }
+
+  /// 领取广告激励（服务端限频）；adType: effect_extra | vip_trial
+  /// 返回当日剩余次数；超出限频抛 ApiException
+  Future<int> claimReward(String adType) async {
+    final api = ref.read(apiClientProvider);
+    final data =
+        await api.post<Map<String, dynamic>>('/ad/reward/claim', {'ad_type': adType});
+    await refresh(); // vip_trial 可能开通体验会员
+    return (data['reward']?['remaining_today'] as num?)?.toInt() ?? 0;
+  }
+}
+
+final memberProvider =
+    AsyncNotifierProvider<MemberNotifier, MemberInfo>(MemberNotifier.new);
+
+class MemberPlan {
+  final int id;
+  final String name;
+  final int priceFen;
+  final int durationDays;
+  final List<String> features;
+
+  const MemberPlan({
+    required this.id,
+    required this.name,
+    required this.priceFen,
+    required this.durationDays,
+    required this.features,
+  });
+
+  factory MemberPlan.fromJson(Map<String, dynamic> e) => MemberPlan(
+        id: (e['id'] as num).toInt(),
+        name: e['name'] as String? ?? '',
+        priceFen: (e['price_fen'] as num?)?.toInt() ?? 0,
+        durationDays: (e['duration_days'] as num?)?.toInt() ?? 30,
+        features: _parseFeatures(e['features'] as String? ?? ''),
+      );
+
+  static List<String> _parseFeatures(String s) {
+    try {
+      return (jsonDecode(s) as List<dynamic>).cast<String>();
+    } catch (_) {
+      return const [];
+    }
+  }
+
+  String get priceText =>
+      '¥${(priceFen / 100).toStringAsFixed(priceFen % 100 == 0 ? 0 : 1)}';
+}
+
+final memberPlanProvider = FutureProvider<List<MemberPlan>>((ref) async {
+  final api = ref.read(apiClientProvider);
+  final list = await api.get<List<dynamic>>('/member/plan/list');
+  return list
+      .map((e) => MemberPlan.fromJson(e as Map<String, dynamic>))
+      .toList();
+});
+
+class OrderResult {
+  final String orderNo;
+  final String payUrl;
+
+  const OrderResult({required this.orderNo, required this.payUrl});
+}
+
+/// 创建支付订单（后端调虎皮棋下单，返回收银台 URL）
+Future<OrderResult> createMemberOrder(WidgetRef ref, int planId) async {
+  final api = ref.read(apiClientProvider);
+  final data =
+      await api.post<Map<String, dynamic>>('/member/order/create', {'plan_id': planId});
+  return OrderResult(
+    orderNo: data['order_no'] as String? ?? '',
+    payUrl: data['pay_url'] as String? ?? '',
+  );
+}
+
+/// 订单状态（支付页 2s 轮询）：pending | paid | closed
+Future<String> fetchOrderStatus(WidgetRef ref, String orderNo) async {
+  final api = ref.read(apiClientProvider);
+  final data = await api.get<Map<String, dynamic>>('/member/order/status',
+      query: {'order_no': orderNo});
+  return data['status'] as String? ?? '';
+}