Clean up: Remove component files

frontend/src/components/common/ErrorBoundary.tsx

@@ -1,44 +0,0 @@
-import React from 'react';
-
-interface ErrorBoundaryState {
-  hasError: boolean;
-}
-
-/**
- * Last line of defence: a render crash shows a recovery screen instead of a
- * blank page, so a user never loses sight of their work without an explanation.
- */
-class ErrorBoundary extends React.Component<{ children: React.ReactNode }, ErrorBoundaryState> {
-  state: ErrorBoundaryState = { hasError: false };
-
-  static getDerivedStateFromError(): ErrorBoundaryState {
-    return { hasError: true };
-  }
-
-  componentDidCatch(error: Error, info: React.ErrorInfo): void {
-    // Kept in the console for now; a real logging endpoint is a Backend concern.
-    console.error('TaskFlow crashed while rendering', error, info.componentStack);
-  }
-
-  render(): React.ReactNode {
-    if (this.state.hasError) {
-      return (
-        <div className="app-error" role="alert">
-          <h1>TaskFlow ran into a problem</h1>
-          <p>Nothing was lost. Reload the page to pick up where you left off.</p>
-          <button
-            type="button"
-            className="btn btn-primary"
-            onClick={() => window.location.reload()}
-          >
-            Reload TaskFlow
-          </button>
-        </div>
-      );
-    }
-
-    return this.props.children;
-  }
-}
-
-export default ErrorBoundary;