fix：参考金值，研听，研值工程通用通用工程公共能力，重点对比网络请求、登录认证、状态管理、本地存储、WebView、推送、版本更新、一键登录、主题/UI 等模块，确定后续统一整改方案

lib/common/widgets/async_state_view.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 
+import '../network/api_error_message.dart';
 import 'app_state_card.dart';
 
 /// Shared loading, failure and empty-state contract for feature pages.
@@ -37,11 +38,11 @@ class AsyncStateView<T> extends StatelessWidget {
     return state.when(
       loading: () =>
           loading ?? const Center(child: CircularProgressIndicator()),
-      error: (_, _) => Center(
+      error: (error, _) => Center(
         child: AppStateCard(
           icon: Icons.error_outline,
           title: errorTitle,
-          subtitle: errorSubtitle,
+          subtitle: ErrorMessageMapper.message(error, fallback: errorSubtitle),
           buttonLabel: onRetry == null ? null : '重试',
           onButtonPressed: onRetry,
           buttonStyle: AppStateButtonStyle.filled,
@@ -60,3 +61,44 @@ class AsyncStateView<T> extends StatelessWidget {
     );
   }
 }
+
+/// Sliver counterpart for CustomScrollView pages without forcing one global
+/// card layout on successful feature content.
+class SliverAsyncState<T> extends StatelessWidget {
+  const SliverAsyncState({
+    super.key,
+    required this.state,
+    required this.data,
+    this.loading,
+    this.onRetry,
+    this.errorSubtitle = '请检查网络后重试',
+  });
+
+  final AsyncValue<T> state;
+  final Widget Function(T value) data;
+  final Widget? loading;
+  final VoidCallback? onRetry;
+  final String errorSubtitle;
+
+  @override
+  Widget build(BuildContext context) => state.when(
+    data: data,
+    loading: () => SliverFillRemaining(
+      hasScrollBody: false,
+      child: loading ?? const Center(child: CircularProgressIndicator()),
+    ),
+    error: (error, _) => SliverFillRemaining(
+      hasScrollBody: false,
+      child: Center(
+        child: AppStateCard(
+          icon: Icons.error_outline,
+          title: '加载失败',
+          subtitle: ErrorMessageMapper.message(error, fallback: errorSubtitle),
+          buttonLabel: onRetry == null ? null : '重试',
+          onButtonPressed: onRetry,
+          buttonStyle: AppStateButtonStyle.filled,
+        ),
+      ),
+    ),
+  );
+}