- LaunchWindow: expose isLoading/error from useCameraDevices; show
'Searching...' only while enumeration is in flight, 'Camera unavailable'
on error, 'No camera found' when list is empty (fixes perpetual loading state)
- LaunchWindow: keep <select> always mounted (sr-only when collapsed) and
expand panel on focus as well as hover; fixes keyboard inaccessibility for
both mic and webcam selectors
- i18n: add webcam.noneFound and webcam.unavailable to en/es/zh-CN locales
- useCameraDevices: remove selectedDeviceId from useEffect deps (use ref instead)
- useCameraDevices: fall back to first available device when selected device is unplugged
- i18n: add missing keys (audio.defaultMicrophone, webcam.defaultCamera, webcam.searching) to en/es/zh-CN
- LaunchWindow: replace hardcoded strings with t() i18n calls
- tests: add afterEach(vi.resetAllMocks()), improve permission test assertions, add stale device fallback test
moncef