Import: downloadable Word template for the session list

A blank three-column session list (Session #, Title, Passage) with instructions and
example rows, built in the browser on demand. A test imports the generated file back
through the real importer.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/App.test.jsx

@@ -541,7 +541,7 @@ describe('Import page', () => {
     expect(await screen.findByRole('heading', { name: /import session list/i })).toBeInTheDocument();
     expect(screen.queryByRole('option', { name: 'KJV' })).not.toBeInTheDocument();
     expect(screen.getByText(/Berean Standard Bible/)).toBeInTheDocument();
-    await user.click(screen.getByRole('button', { name: /back/i }));
+    await user.click(screen.getByRole('button', { name: /^back$/i }));
     expect(await screen.findByRole('button', { name: /import session list/i })).toBeInTheDocument();
   });
 });
@@ -1391,3 +1391,17 @@ describe('Resizable study column', () => {
     expect(columns().style.getPropertyValue('--study-right')).toBe('560px');
   });
 });
+
+describe('Import template', () => {
+  test('the Import page offers a Word template to download', async () => {
+    const user = userEvent.setup();
+    await renderApp();
+    await user.click(screen.getByRole('button', { name: /import session list/i }));
+    await user.click(await screen.findByRole('button', { name: /download template/i }));
+    await waitFor(() => expect(URL.createObjectURL).toHaveBeenCalled());
+    const blob = URL.createObjectURL.mock.calls.at(-1)[0];
+    expect(blob.type).toMatch(/wordprocessingml/);
+    // and the button comes back to normal afterwards
+    expect(await screen.findByRole('button', { name: /download template/i })).toBeEnabled();
+  });
+});