feat:增加博客卡片内容

lib/utils/index.dart

@@ -0,0 +1,28 @@
+import 'package:blog_app/models/common.dart';
+
+List<T> convertListResponse<T>(
+  dynamic data,
+  T Function(Map<String, dynamic>) fromJson,
+) {
+  if (data is List) {
+    return data.map((item) => fromJson(item as Map<String, dynamic>)).toList();
+  }
+  throw FormatException(
+    'Expected a list of items for conversion, but got ${data.runtimeType}',
+  );
+}
+
+PageResult<T> convertPageResponse<T>(
+  dynamic data,
+  T Function(Map<String, dynamic>) fromJson,
+) {
+  if (data is Map<String, dynamic>) {
+    return PageResult<T>.fromJson(
+      data,
+      (json) => fromJson(json as Map<String, dynamic>),
+    );
+  }
+  throw FormatException(
+    'Expected a Map for page response conversion, but got ${data.runtimeType}',
+  );
+}