feat(p10-reframe-w2): CPU wax-blob lava physics + 2D collision; smin metaball render

DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor.cs

@@ -58,7 +58,10 @@ 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 static readonly bool Debug = false;
+    // ON for the Phase 10 reframe Wave R2 lava test (matches the JS-side DEBUG in
+    // MixVisualizer.ts). Daniel evaluates the physics in-browser; flip back to false at
+    // reframe close along with the JS flag.
+    private static readonly bool Debug = true;
     private const string Tag = "[MixVisualizer]";
 
     private static void DebugLog(string message)
@@ -188,7 +191,9 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
     }
 
     // The controls row mutated a slider on the shared state and raised Changed. Push all four control
-    // uniforms (cheap scalar interop; the inert three are no-ops in the parity shader until Wave 3).
+    // values (cheap scalar interop). In the Phase 10 reframe Wave R2, three of them are re-routed to
+    // the lava physics inside the JS handle (setBubblyness→gravity, setDetach→heat,
+    // setColorShiftSpeed→collision) — see MixVisualizer.ts; the bridge contract is unchanged.
     private void OnControlStateChanged() => InvokeAsync(async () =>
     {
         await PushControlsAsync();
@@ -198,8 +203,9 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
 
     /// <summary>
     /// Push all four control values to the module from the shared state. Used to seed on first render
-    /// and to re-push when the controls row signals a change. Resolution drives the live render; the
-    /// other three are inert in the parity shader (Wave 3 consumes them).
+    /// and to re-push when the controls row signals a change. Resolution drives the scroll/zoom; the
+    /// other three are routed to the lava physics (gravity/heat/collision) by the JS handle in
+    /// Wave R2 (see MixVisualizer.ts). The bridge contract is unchanged.
     /// </summary>
     private async Task PushControlsAsync()
     {