fn emit_mic_level(app: &AppHandle, level: f32)Expand description
Push the smoothed mic level to the webview via the mic-level
Tauri event (M-AUDIO.METER / AUT-287). Failures are swallowed +
tracing::trace!’d — at 20 Hz a missed emit is invisible, and
surfacing the error to the worker loop would break audio
capture for cosmetic event-bus issues.