fix(review): const→static readonly Debug silences CS0162; update stale rAF comment to renderedPlayhead()

DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor.cs

@@ -58,7 +58,7 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
     // datum-fetch / subscription / playback-coupling seams log to the browser console (prefixed
     // `[MixVisualizer]`, same as the JS logs so the two interleave into one timeline). These pinpoint
     // which upstream link is broken when the ribbon stays blank — set false once confirmed healthy.
-    private const bool Debug = false;
+    private static readonly bool Debug = false;
     private const string Tag = "[MixVisualizer]";
 
     private static void DebugLog(string message)

DeepDrftPublic/Interop/visualizer/MixVisualizer.ts

@@ -742,10 +742,11 @@ export function create(canvas: HTMLCanvasElement): MixVisualizerHandle {
     //
     // Smoothness (spec §2e / §5.4): the scroll must advance every animation frame, not
     // step at Blazor's ~10 Hz playback-push cadence. We achieve that by interpolating
-    // the playhead on the wall clock — each frame uploads effectivePlayhead(), which
-    // advances the last pushed position by real time elapsed since the push. (The
-    // separate uTimeSeconds monotonic clock is reserved for Wave 3's field/blob motion
-    // and is unused by this parity shader; it is NOT what drives the scroll here.)
+    // the playhead on the wall clock — each frame uploads renderedPlayhead() (= effectivePlayhead()
+    // + the decaying jitter-correction offset), which advances the last pushed position by real time
+    // elapsed since the push and blends out any accumulated timing error. (The separate uTimeSeconds
+    // monotonic clock is reserved for Wave 3's field/blob motion and is unused by this parity shader;
+    // it is NOT what drives the scroll here.)
 
     /** Draw one still frame immediately, without scheduling a new rAF. */
     function redrawOnce(): void {