fix(p15): remediate four green-minor review findings

Tokenize scrim navy RGB triple (--deepdrft-scrim-rgb); LAVA row now
flex-start so knobs group left; WAVE row keeps space-between for
right-pinned width knob; remove inert margin-left:auto/wvc-row-right;
correct stale seven->ten count in OnControlStateChanged comment.

DeepDrftPublic.Client/Controls/WaveformVisualizer.razor.cs

@@ -280,10 +280,11 @@ public partial class WaveformVisualizer : ComponentBase, IAsyncDisposable
         await PushThemeIfChangedAsync();
     }
 
-    // The controls bar mutated a knob on the shared state and raised Changed. Push all seven control
-    // values (cheap scalar interop). Each control now drives its own dedicated dial in the JS handle
-    // (lava reframe Wave R4) — scroll speed → visible-time-span, plus the six lava/colour dials; see
-    // PushControlsAsync. The bridge stays the sole owner of the JS module handle.
+    // The controls bar mutated a knob on the shared state and raised Changed. Push all ten control
+    // values (cheap scalar interop): the eight continuous dials plus the two subsystem enables. Each
+    // dial drives its own dedicated uniform in the JS handle (lava reframe Wave R4) — scroll speed →
+    // visible-time-span, plus the six lava/colour dials; see PushControlsAsync. The bridge stays the
+    // sole owner of the JS module handle.
     private void OnControlStateChanged() => InvokeAsync(async () =>
     {
         await PushControlsAsync();