Mixed bag of things

src/main.rs

@@ -94,6 +94,7 @@ fn main() -> io::Result<()> {
     app.audio.config.show_scope = settings.display.show_scope;
     app.audio.config.show_spectrum = settings.display.show_spectrum;
     app.ui.show_completion = settings.display.show_completion;
+    app.ui.flash_brightness = settings.display.flash_brightness;
 
     let metrics = Arc::new(EngineMetrics::default());
     let scope_buffer = Arc::new(ScopeBuffer::new());
@@ -212,6 +213,13 @@ fn main() -> io::Result<()> {
         app.metrics.event_count = seq_snapshot.event_count;
         app.metrics.dropped_events = seq_snapshot.dropped_events;
 
+        app.ui.event_flash = (app.ui.event_flash - 0.1).max(0.0);
+        let new_events = app.metrics.event_count.saturating_sub(app.ui.last_event_count);
+        if new_events > 0 {
+            app.ui.event_flash = (new_events as f32 * 0.4).min(1.0);
+        }
+        app.ui.last_event_count = app.metrics.event_count;
+
         app.flush_queued_changes(&sequencer.cmd_tx);
         app.flush_dirty_patterns(&sequencer.cmd_tx);