fix(i18n): 去掉印尼语内容完整性过滤，缺失时回退中文

lib/core/data/models/drama.dart

@@ -241,11 +241,11 @@ class Drama {
   }
 
   String localizedTitle(String languageCode) {
-    return localizedRequiredText(languageCode, title, titleLocales);
+    return localizedText(languageCode, title, titleLocales);
   }
 
   String localizedSynopsis(String languageCode) {
-    return localizedRequiredText(languageCode, synopsis, synopsisLocales);
+    return localizedText(languageCode, synopsis, synopsisLocales);
   }
 
   String localizedTag(String languageCode) {

lib/core/data/models/locale_text.dart

@@ -18,16 +18,3 @@ String localizedText(
   if (chinese.isNotEmpty) return chinese;
   return fallback;
 }
-
-/// 按当前语言取必须本地化的文案；印尼语缺失时不回退中文。
-String localizedRequiredText(
-  String languageCode,
-  String fallback,
-  Map<String, String> locales,
-) {
-  final primaryCode = languageCode.split(RegExp(r'[_-]')).first;
-  final selected = locales[languageCode] ?? locales[primaryCode] ?? '';
-  if (selected.trim().isNotEmpty) return selected;
-  if (primaryCode == 'id') return '';
-  return localizedText(primaryCode, fallback, locales);
-}