Address macOS VoiceOver and keyboard usability without changing the
visual layout:
- freqCtrl: expose the current frequency to screen readers via the
accessible name (read on demand), and announce it only after tuning
settles (~500ms debounce) so spinning the dial never floods speech.
All gated behind QAccessible::isActive() for zero overhead otherwise.
- Make navigation/operating buttons Tab-focusable (wfmain bottom bar
and scope controls, band buttons, VFO/scope buttons), while leaving
the transmit-hazardous buttons (Transmit, Tune, Power On/Off) as
NoFocus so a stray Space/Enter cannot key the rig.
- Add accessible names to abbreviated/unlabeled controls across
wfmain, cwsender, bandbuttons, memories, and frequencyinputwidget.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
