Feat: UI/UX and ducking compressor

src/app/dispatch.rs

@@ -391,6 +391,8 @@ impl App {
             AppCommand::ToggleSpectrum => self.audio.config.show_spectrum = !self.audio.config.show_spectrum,
             AppCommand::ToggleLissajous => self.audio.config.show_lissajous = !self.audio.config.show_lissajous,
             AppCommand::TogglePreview => self.audio.config.show_preview = !self.audio.config.show_preview,
+            AppCommand::SetGainBoost(g) => self.audio.config.gain_boost = g,
+            AppCommand::ToggleNormalizeViz => self.audio.config.normalize_viz = !self.audio.config.normalize_viz,
             AppCommand::TogglePerformanceMode => self.ui.performance_mode = !self.ui.performance_mode,
 
             // Metrics