Initial commit

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/hj_utils/text_util.dart

@@ -0,0 +1,17 @@
+/// 文本处理工具类
+class TextUtil {
+  static bool isEmpty(String? text) {
+    return (null == text || text.isEmpty);
+  }
+
+  static bool isNotEmpty(String? text) {
+    return (null != text && text.isNotEmpty);
+  }
+}
+
+/// 解析后端下发的字符串数组：非数组（null/空串/对象/数字）一律给空数组，
+/// 数组内的 null 丢掉，非字符串元素转字符串
+List<String> parseStringList(dynamic value) {
+  if (value is! List) return [];
+  return value.where((e) => e != null).map((e) => e.toString()).toList();
+}