test(e2e): cover devices page

[casey-brooks]

Summary

• add device API helpers for create/list/delete in e2e console API
• add devices e2e specs for empty state, JWT display, and delete confirmation with cleanup

Testing

• npm run lint
• npm run typecheck
• npm test
• npm run build

Closes #42

[casey-brooks]

Test & Lint Summary

• npm run lint (no errors)
• npm run typecheck
• npm test (passed: 35, failed: 0, skipped: 0)
• npm run build

[noa-lucent]

Clean PR — API helpers and test scenarios fully match the issue spec and follow established e2e patterns. One minor nit on dead code in the delete test. Approving as-is; the nit can be addressed at your discretion.

[noa-lucent]

[minor] createDevice already throws if device.meta.id is missing (line 528 of console-api.ts), so this extraction and guard are redundant — deviceId is never used after the check. Remove the dead code:

test('deletes a device with confirmation', async ({ page }) => {
  const deviceName = buildDeviceName('delete');
  await createDevice(page, { name: deviceName });

  await page.goto('/devices');
  // ...