fix(instrument-ui): raise Disabled-cue contrast, fix stale 1.2 MASTER row, close hover/focus minors

src/shell/instrument/editor_input_deck.cpp

@@ -32,9 +32,11 @@ bool ReaSamplerEditor::mouseDownDeck(const FaceLayout& fl, int x, int y) {
     // The deck IS the overlay's click target: anywhere inside an envelope group — panel
     // background, knob or button — focuses that envelope, and any other group clears it. Set
     // BEFORE the kind switch and it consumes nothing, so every grab and commit below still
-    // runs. A drag in flight owns the surface, so it refuses the change.
-    // Repaints HERE rather than leaning on the branches below: a click on a group's bare
-    // padding, or on an inert knob, changes the focus and reaches no other invalidate.
+    // runs. A drag in flight owns the surface, so it refuses the change — always true at this
+    // call site today (mouse capture makes a real WM_LBUTTONDOWN-while-dragging unreachable;
+    // WM_CAPTURECHANGED and WM_LBUTTONUP both reset drag_ before another down can land), but
+    // left explicit rather than assumed so a future capture-handling change fails loud, not
+    // by silently letting a drag's own surface steal its own focus mid-gesture.
     if (drag_ == DragKind::kNone) {
         const OverlayEnv focus = overlayEnvForGroup(hit.group);
         if (focus != overlayEnv_) {