feat(email): confirm hub thread unlink

job-tracker-ui/src/correspondence-inbox-page.test.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import '@testing-library/jest-dom';
-import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+import { fireEvent, render, screen, waitFor, within } from '@testing-library/react';
 import { MemoryRouter, Navigate, Route, Routes } from 'react-router-dom';
 import { ToastProvider } from './toast';
 import { ConfirmProvider } from './confirm';
@@ -120,6 +120,27 @@ describe('CorrespondenceInboxPage', () => {
     });
   });
 
+  test('unlinks a Gmail thread only after confirmation and returns it to review', async () => {
+    mockedApi.post.mockResolvedValue({ data: { threadId: 'thread-1', jobApplicationId: 42, removedMessages: 1, decision: 'review' } } as any);
+    renderPage();
+
+    fireEvent.click(await screen.findByRole('button', { name: /^unlink thread$/i }));
+    expect(mockedApi.post).not.toHaveBeenCalled();
+
+    const dialog = await screen.findByRole('dialog');
+    expect(within(dialog).getByText(/provider copy is not deleted/i)).toBeInTheDocument();
+    fireEvent.click(within(dialog).getByRole('button', { name: /^unlink thread$/i }));
+
+    await waitFor(() => expect(mockedApi.post).toHaveBeenCalledWith('/gmail/unlink-thread', {
+      jobApplicationId: 42,
+      threadId: 'thread-1',
+      note: 'Unlinked from Job email hub',
+      nextDecision: 'review',
+    }));
+    await waitFor(() => expect(mockedApi.get).toHaveBeenCalledWith('/correspondence', expect.anything()));
+    expect(await screen.findByText(/returned to recruitment review/i)).toBeInTheDocument();
+  });
+
   test('falls back to the saved copy when provider detail is unavailable', async () => {
     const original = mockedApi.get.getMockImplementation();
     mockedApi.get.mockImplementation((url: string, config?: any) => {