The pulseaudio module had empty strings where Nerd Font glyphs were
meant to be, so the volume / mute / bluetooth indicators rendered
blank. Re-inject the proper PUA codepoints (F027/F028 volume,
F6A9 mute, F293 bluetooth). Bump #pulseaudio.muted from #3a3a46
to #8e8e9a so it stays readable against the bar background.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>