v0.63.2

Bug Fixes

• Audio recording: Fix voice recording failing when background audio (YouTube, music) is playing. Disables browser-side audio processing (echoCancellation, noiseSuppression, autoGainControl) which was incorrectly suppressing the user's voice as "noise" or "echo".

This is a re-application of the fix from v0.61.0 that was lost during refactoring.