mod: 接口整理、增加up粉丝请求

lib/common/widgets/http_error.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+
+class HttpError extends StatelessWidget {
+  HttpError({required this.errMsg, required this.fn, super.key});
+
+  String errMsg = '';
+  final Function()? fn;
+
+  @override
+  Widget build(BuildContext context) {
+    return SliverToBoxAdapter(
+      child: SizedBox(
+        height: 150,
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.center,
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Text(
+              errMsg,
+              style: Theme.of(context).textTheme.titleMedium,
+            ),
+            const SizedBox(height: 10),
+            ElevatedButton(
+                onPressed: () {
+                  fn!();
+                },
+                child: const Text('点击重试'))
+          ],
+        ),
+      ),
+    );
+  }
+}