Feat: saving screen during perfs

src/app/dispatch.rs

@@ -388,6 +388,7 @@ impl App {
             AppCommand::ToggleScope => self.audio.config.show_scope = !self.audio.config.show_scope,
             AppCommand::ToggleSpectrum => self.audio.config.show_spectrum = !self.audio.config.show_spectrum,
             AppCommand::TogglePreview => self.audio.config.show_preview = !self.audio.config.show_preview,
+            AppCommand::TogglePerformanceMode => self.ui.performance_mode = !self.ui.performance_mode,
 
             // Metrics
             AppCommand::ResetPeakVoices => self.metrics.peak_voices = 0,

src/app/persistence.rs

@@ -26,6 +26,7 @@ impl App {
                 show_spectrum: self.audio.config.show_spectrum,
                 show_preview: self.audio.config.show_preview,
                 show_completion: self.ui.show_completion,
+                performance_mode: self.ui.performance_mode,
                 color_scheme: self.ui.color_scheme,
                 layout: self.audio.config.layout,
                 hue_rotation: self.ui.hue_rotation,