test: add frontend dialog interaction coverage

job-tracker-ui/src/confirm-flow.test.tsx

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+import React from 'react';
+import '@testing-library/jest-dom';
+import { fireEvent, render, screen } from '@testing-library/react';
+import { ConfirmProvider } from './confirm';
+import { useConfirm } from './confirm';
+
+function DeleteDemo() {
+  const { confirm } = useConfirm();
+  return <button onClick={() => void confirm({ title: 'Delete attachment', message: 'Delete attachment "resume.pdf"?', confirmLabel: 'Delete', destructive: true })}>Delete attachment</button>;
+}
+
+test('destructive confirm dialog shows warning state', async () => {
+  render(
+    <ConfirmProvider>
+      <DeleteDemo />
+    </ConfirmProvider>,
+  );
+
+  fireEvent.click(screen.getByRole('button', { name: /delete attachment/i }));
+
+  expect(await screen.findByText(/this action may be hard to undo/i)).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: /^delete$/i })).toBeInTheDocument();
+});

job-tracker-ui/src/dialog-flow.test.tsx

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+import React from 'react';
+import '@testing-library/jest-dom';
+import { render, screen, fireEvent } from '@testing-library/react';
+import { ConfirmProvider } from './confirm';
+import { PromptProvider, usePrompt } from './prompt';
+
+function RenameDemo() {
+  const { prompt } = usePrompt();
+  return (
+    <button onClick={() => void prompt({ title: 'Rename attachment', message: 'Choose a new name', defaultValue: 'resume.pdf', confirmLabel: 'Rename' })}>
+      Rename attachment
+    </button>
+  );
+}
+
+test('prompt dialog opens with default rename value', async () => {
+  render(
+    <ConfirmProvider>
+      <PromptProvider>
+        <RenameDemo />
+      </PromptProvider>
+    </ConfirmProvider>,
+  );
+
+  fireEvent.click(screen.getByRole('button', { name: /rename attachment/i }));
+
+  expect(await screen.findByDisplayValue('resume.pdf')).toBeInTheDocument();
+  expect(screen.getByText(/choose a new name/i)).toBeInTheDocument();
+  expect(screen.getByText(/10\/180/i)).toBeInTheDocument();
+});