feat: citizen news support

lib/api/news_api.dart

@@ -0,0 +1,23 @@
+import 'dart:convert';
+
+import '../common/conf/url_conf.dart';
+import '../common/io/rs_http.dart';
+import '../common/utils/log.dart';
+import '../data/citizen_news_data.dart';
+import 'api.dart';
+
+class NewsApi {
+  static Future<CitizenNewsData?> getLatest() async {
+    try {
+      final data = await RSHttp.getText(
+        "${URLConf.newsApiHome}/api/latest",
+        withCustomDns: await Api.isUseInternalDNS(),
+      );
+      final map = json.decode(data);
+      return CitizenNewsData.fromJson(map);
+    } catch (e) {
+      dPrint("getLatestNews error: $e");
+    }
+    return null;
+  }
+}