feat(email): persist and resume reply drafts

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

@@ -65,6 +65,7 @@ describe('CorrespondenceInboxPage', () => {
           attachmentCount: 1,
         },
       ] } as any);
+      if (url === '/email/drafts') return Promise.resolve({ data: [] } as any);
       if (url === '/email/message') return Promise.resolve({ data: {
         id: 'message-1', threadId: 'thread-1', subject: 'Interview invite', from: 'Maria Recruiter <maria@acme.test>', to: 'user@example.test',
         date: new Date().toISOString(), snippet: 'Interview', bodyText: 'Please choose an interview time.', labels: ['INBOX'], attachments: [{ fileName: 'agenda.pdf' }],
@@ -223,6 +224,69 @@ describe('CorrespondenceInboxPage', () => {
     expect(screen.getByRole('button', { name: /review and send/i })).toBeDisabled();
   });
 
+  test('saves an incomplete reply with its server delivery identity', async () => {
+    const original = mockedApi.get.getMockImplementation();
+    mockedApi.get.mockImplementation((url: string, config?: any) => {
+      if (url === '/email/providers') return Promise.resolve({ data: [
+        { provider: 'gmail', displayName: 'Gmail', connected: true, address: 'owner@gmail.test', canRead: true, canSend: true },
+      ] } as any);
+      return original!(url, config);
+    });
+    mockedApi.post.mockImplementation((url: string) => {
+      if (url === '/email/drafts') return Promise.resolve({ data: {
+        id: 'draft-1', jobApplicationId: 42, provider: 'gmail', to: 'Maria Recruiter <maria@acme.test>', subject: 'Re: Interview invite', bodyText: '',
+        threadId: 'thread-1', clientRequestId: 'server-request-id', revision: 1, createdAtUtc: new Date().toISOString(), updatedAtUtc: new Date().toISOString(),
+      } } as any);
+      return Promise.reject(new Error(`Unexpected POST ${url}`));
+    });
+
+    renderPage();
+    fireEvent.click(await screen.findByRole('button', { name: /view message/i }));
+    fireEvent.click(await screen.findByRole('button', { name: /reply with connected provider/i }));
+    fireEvent.click(screen.getByRole('button', { name: /^save draft$/i }));
+
+    await waitFor(() => expect(mockedApi.post).toHaveBeenCalledWith('/email/drafts', {
+      jobApplicationId: 42,
+      provider: 'gmail',
+      to: 'Maria Recruiter <maria@acme.test>',
+      subject: 'Re: Interview invite',
+      bodyText: '',
+      threadId: 'thread-1',
+    }));
+    expect(await screen.findByText(/email draft saved/i)).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: /^save changes$/i })).toBeInTheDocument();
+  });
+
+  test('resumes a saved draft and surfaces revision conflicts without overwriting it', async () => {
+    const original = mockedApi.get.getMockImplementation();
+    mockedApi.get.mockImplementation((url: string, config?: any) => {
+      if (url === '/email/drafts') return Promise.resolve({ data: [{
+        id: 'draft-1', jobApplicationId: 42, provider: 'gmail', to: 'maria@acme.test', subject: 'Saved subject', bodyText: 'Saved private draft.',
+        threadId: 'thread-1', clientRequestId: 'server-request-id', revision: 4, createdAtUtc: new Date().toISOString(), updatedAtUtc: new Date().toISOString(),
+      }] } as any);
+      if (url === '/email/providers') return Promise.resolve({ data: [
+        { provider: 'gmail', displayName: 'Gmail', connected: true, address: 'owner@gmail.test', canRead: true, canSend: true },
+      ] } as any);
+      return original!(url, config);
+    });
+    mockedApi.put.mockRejectedValue({ response: { status: 409 } });
+
+    renderPage();
+    fireEvent.click(await screen.findByRole('button', { name: /resume saved subject/i }));
+    expect(screen.getByLabelText(/message/i)).toHaveValue('Saved private draft.');
+    fireEvent.change(screen.getByLabelText(/message/i), { target: { value: 'Conflicting local edit.' } });
+    fireEvent.click(screen.getByRole('button', { name: /^save changes$/i }));
+
+    await waitFor(() => expect(mockedApi.put).toHaveBeenCalledWith('/email/drafts/draft-1', {
+      revision: 4,
+      to: 'maria@acme.test',
+      subject: 'Saved subject',
+      bodyText: 'Conflicting local edit.',
+    }));
+    expect(await screen.findByText(/changed in another tab/i)).toBeInTheDocument();
+    expect(screen.getByLabelText(/message/i)).toHaveValue('Conflicting local edit.');
+  });
+
   test('does not offer retry when delivery is uncertain', async () => {
     const original = mockedApi.get.getMockImplementation();
     mockedApi.get.mockImplementation((url: string, config?: any) => {