feat(reward): 新增客户端奖励中心

lib/core/data/repositories/reward_repository.dart

@@ -0,0 +1,29 @@
+// Author: fruit.com.cn
+
+import '../models/reward.dart';
+import '../remote/reward_api.dart';
+
+/// 奖励中心数据来源。
+abstract interface class RewardRepository {
+  Future<RewardOverview> fetchOverview(String locale);
+
+  Future<RewardActionResult> checkIn();
+
+  Future<RewardActionResult> claim(String taskId);
+}
+
+/// 奖励中心 HTTP 仓库。
+class HttpRewardRepository implements RewardRepository {
+  const HttpRewardRepository(this._api);
+
+  final RewardApi _api;
+
+  @override
+  Future<RewardOverview> fetchOverview(String locale) => _api.overview(locale);
+
+  @override
+  Future<RewardActionResult> checkIn() => _api.checkIn();
+
+  @override
+  Future<RewardActionResult> claim(String taskId) => _api.claim(taskId);
+}