fix(i18n): 印尼语内容缺失时不再回退中文

lib/core/formatting/content_locale_guard.dart

@@ -0,0 +1,21 @@
+// Author: fruit.com.cn
+
+import '../data/models/drama.dart';
+
+const String _indonesianLanguageCode = 'id';
+
+/// 判断短剧是否满足当前界面语言的基础文案完整度。
+bool isDramaCompleteForLocale(Drama drama, String languageCode) {
+  final primaryCode = languageCode.split(RegExp(r'[_-]')).first;
+  if (primaryCode != _indonesianLanguageCode) return true;
+  return drama.localizedTitle(primaryCode).trim().isNotEmpty &&
+      drama.localizedSynopsis(primaryCode).trim().isNotEmpty;
+}
+
+/// 过滤不满足首发语言文案完整度的短剧，保持原顺序。
+List<Drama> visibleDramasForLocale(
+  Iterable<Drama> dramas,
+  String languageCode,
+) => dramas
+    .where((drama) => isDramaCompleteForLocale(drama, languageCode))
+    .toList(growable: false);