Add error boundaries

src-web/components/ErrorBoundary.tsx

@@ -0,0 +1,68 @@
+import type { ErrorInfo, ReactNode } from 'react';
+import { Component, useEffect } from 'react';
+import { showDialog } from '../lib/dialog';
+import { Banner } from './core/Banner';
+import { Button } from './core/Button';
+import { InlineCode } from './core/InlineCode';
+import RouteError from './RouteError';
+
+interface ErrorBoundaryProps {
+  name: string;
+  children: ReactNode;
+}
+
+interface ErrorBoundaryState {
+  hasError: boolean;
+  error: Error | null;
+}
+
+export class ErrorBoundary extends Component<ErrorBoundaryProps, ErrorBoundaryState> {
+  constructor(props: ErrorBoundaryProps) {
+    super(props);
+    this.state = { hasError: false, error: null };
+  }
+
+  static getDerivedStateFromError(error: Error): ErrorBoundaryState {
+    return { hasError: true, error };
+  }
+
+  componentDidCatch(error: Error, info: ErrorInfo) {
+    console.warn('Error caught by ErrorBoundary:', error, info);
+  }
+
+  render() {
+    if (this.state.hasError) {
+      return (
+        <Banner color="danger" className="flex items-center gap-2">
+          <div>
+            Error rendering <InlineCode>{this.props.name}</InlineCode> component
+          </div>
+          <Button
+            className="inline-flex"
+            variant="border"
+            color="danger"
+            size="2xs"
+            onClick={() => {
+              showDialog({
+                id: 'error-boundary',
+                render: () => <RouteError error={this.state.error} />,
+              });
+            }}
+          >
+            Show
+          </Button>
+        </Banner>
+      );
+    }
+
+    return this.props.children;
+  }
+}
+
+export function ErrorBoundaryTestThrow() {
+  useEffect(() => {
+    throw new Error('test error');
+  });
+
+  return <div>Hello</div>;
+}