Adds validate_sound_path() that checks file type, allowed directories, and known audio extensions. Updates play() to use validation before passing paths to audio players.
Sound fields accept WAV/MP3/OGG/FLAC/M4A/AAC/AIFF/Opus. Browse dialog
auto-plays each file on selection so you can preview before confirming.
sound.py falls back to ffplay/gst-play-1.0 for formats not supported
by pw-play/paplay.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
New sound.py plays a user WAV (or a built-in system sound) without blocking.
Config gains [sounds] before/after paths. The daemon plays the "before" cue when
recording starts and the "after" cue on every stop (stop+paste, stop+paste+Enter,
or auto-stop on silence — all funnel through finish_dictation). Input tab gets an
Audio cues section: file pickers with play-test and clear-to-default buttons.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
