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lib/widgets/error_dialog.dart

@@ -0,0 +1,65 @@
+import 'package:flutter/material.dart';
+
+/// Error dialog widget
+///
+/// Displays an error message with an icon and optional action button
+class ErrorDialog extends StatelessWidget {
+  final String title;
+  final String message;
+  final String? actionText;
+  final VoidCallback? onAction;
+
+  const ErrorDialog({
+    super.key,
+    required this.title,
+    required this.message,
+    this.actionText,
+    this.onAction,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      icon: Icon(
+        Icons.error_outline,
+        size: 48,
+        color: Theme.of(context).colorScheme.error,
+      ),
+      title: Text(title),
+      content: Text(message),
+      actions: [
+        if (actionText != null && onAction != null)
+          TextButton(
+            onPressed: () {
+              Navigator.of(context).pop();
+              onAction!();
+            },
+            child: Text(actionText!),
+          ),
+        TextButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: const Text('关闭'),
+        ),
+      ],
+    );
+  }
+
+  /// Show error dialog
+  static Future<void> show(
+    BuildContext context, {
+    required String title,
+    required String message,
+    String? actionText,
+    VoidCallback? onAction,
+  }) {
+    return showDialog(
+      context: context,
+      builder: (context) => ErrorDialog(
+        title: title,
+        message: message,
+        actionText: actionText,
+        onAction: onAction,
+      ),
+    );
+  }
+}