Re-generate monologue chimes (were oversized placeholders) and
fog_recognition (was silent). Fix sample rate headers on remaining
assets (192kHz→44.1kHz). All 8 UI assets now at 44.1kHz stereo,
LUFS -16 normalized, Vorbis q6, durations within D-038 spec.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>