Mic input gain (was 3x) and per-user receive gain (was 2x) had
asymmetric boost ceilings. Raise both, plus the desktop aux input
gain (was 3x), to a uniform 4x (400%) on macOS, iOS, and Windows.
The master Output volume slider is unchanged (still 1x). No core
changes needed: the C ABI only clamps negatives, so the ceilings
live entirely in the client UI sliders.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Talon
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