♻️ Refactor riverpod pagination loading

lib/widgets/response.dart

@@ -0,0 +1,41 @@
+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+import 'package:gap/gap.dart';
+import 'package:material_symbols_icons/symbols.dart';
+
+class ResponseErrorWidget extends StatelessWidget {
+  final Error error;
+  final VoidCallback onRetry;
+  const ResponseErrorWidget({
+    super.key,
+    required this.error,
+    required this.onRetry,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      children: [
+        const Icon(Symbols.error_outline, size: 48),
+        const Gap(16),
+        Text(
+          error.toString(),
+          textAlign: TextAlign.center,
+          style: const TextStyle(color: Color(0xFF757575)),
+        ),
+        const SizedBox(height: 16),
+        TextButton(onPressed: onRetry, child: const Text('retry').tr()),
+      ],
+    );
+  }
+}
+
+class ResponseLoadingWidget extends StatelessWidget {
+  const ResponseLoadingWidget({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Center(child: CircularProgressIndicator());
+  }
+}