first commit

Made-with: Cursor

frontend/src/ErrorBoundary.tsx

@@ -0,0 +1,43 @@
+import { Component, ErrorInfo, ReactNode } from "react";
+
+interface Props {
+  children: ReactNode;
+}
+
+interface State {
+  hasError: boolean;
+  error: Error | null;
+}
+
+export class ErrorBoundary extends Component<Props, State> {
+  state: State = { hasError: false, error: null };
+
+  static getDerivedStateFromError(error: Error): State {
+    return { hasError: true, error };
+  }
+
+  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
+    console.error("App error:", error, errorInfo);
+  }
+
+  render() {
+    if (this.state.hasError && this.state.error) {
+      return (
+        <div style={{ padding: "2rem", maxWidth: 900, margin: "0 auto", fontFamily: "Arial", color: "#333" }}>
+          <h1 style={{ color: "#c0392b", marginBottom: "1rem" }}>Something went wrong</h1>
+          <pre style={{ background: "#f7f7f7", padding: "1rem", overflow: "auto", fontSize: 13 }}>
+            {this.state.error.message}
+          </pre>
+          <button
+            type="button"
+            onClick={() => this.setState({ hasError: false, error: null })}
+            style={{ marginTop: "1rem", padding: "8px 16px", cursor: "pointer" }}
+          >
+            Try again
+          </button>
+        </div>
+      );
+    }
+    return this.props.children;
+  }
+}