Add About section to settings page with version info and tests (#119)

* feat(web): add About section to settings page

- Add website link to hapi.run
- Display app version from CLI package
- Display protocol version from shared module
- Add Vitest testing setup with settings page tests

🤖 Generated with Claude Code

* test(web): add tests for website link and i18n key usage

Address residual risks mentioned in PR review:
- Test website link URL and security attributes (target, rel)
- Verify correct i18n keys are used for About section via spy

Simplify test setup by using real I18nProvider and en locale.

🤖 Generated with Claude Code

web/src/lib/locales/en.ts

@@ -239,6 +239,10 @@ export default {
   'settings.voice.title': 'Voice Assistant',
   'settings.voice.language': 'Voice Language',
   'settings.voice.autoDetect': 'Auto-detect',
+  'settings.about.title': 'About',
+  'settings.about.website': 'Website',
+  'settings.about.appVersion': 'App Version',
+  'settings.about.protocolVersion': 'Protocol Version',
 
   // Misc
   'misc.noMachines': 'No machines available',