feat(flutter): 增加轮播自动播放与站内通知

lib/core/data/remote/notice_api.dart

@@ -0,0 +1,23 @@
+// Author: fruit.com.cn
+
+import '../models/notice.dart';
+import 'api_client.dart';
+
+/// Anonymous system notice API.
+class NoticeApi {
+  const NoticeApi(this._client);
+
+  final ApiClient _client;
+
+  /// Loads one page from `GET /app/notices`.
+  Future<NoticePage> page({required int pageIndex, int pageSize = 20}) async {
+    final data = await _client.get(
+      '/app/notices',
+      query: {'pageIndex': '$pageIndex', 'pageSize': '$pageSize'},
+    );
+    if (data is! Map<String, dynamic>) {
+      return const NoticePage(total: 0);
+    }
+    return NoticePage.fromJson(data);
+  }
+}