* fix(frontend): make the panel usable with screen readers
* fix(frontend): keep mobile tab names and the inbound expiry hint
Review of #6907 found two gaps in the screen-reader pass:
- On phone-width screens catTabLabel renders only the icon and names the
tab by putting aria-label on it, but callers now pass that icon with
aria-hidden for the desktop label, so every Settings, Xray and Host
category tab lost its name under TalkBack. catTabLabel now clears
aria-hidden on the icon it uses as the name.
- DateTimePicker forwarded id and aria-label but not aria-describedby,
so the inbound expiry hint ("leave blank to never expire") was never
attached. It now forwards it on both the Gregorian and Jalali input.