test(web): add help-button accessibility test to WatchdogPanel

Covers the tooltip trigger buttons added for a11y: asserts each of the
three watchdog fields renders a <button> with the correct aria-label.

https://claude.ai/code/session_01X74kb6YgwetxRSuj1U5NR4

Author: claude

app/packages/web/src/components/watchdog-panel.component.test.tsx

@@ -41,6 +41,14 @@ describe('WatchdogPanel', () => {
     expect(screen.getByRole('button', { name: /save/i })).toBeInTheDocument();
   });
 
+  it('should render an accessible help button for each watchdog field', () => {
+    render(<WatchdogPanel />);
+
+    expect(screen.getByRole('button', { name: 'Check interval (min) help' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Idle checks before shutdown help' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Min packets (activity threshold) help' })).toBeInTheDocument();
+  });
+
   it('should show a success toast after saving settings', async () => {
     render(<WatchdogPanel />);