Bake window derives itself: %-knob fold, declick pad, Gate held to exhaustion, preview velocity; Hold is the one knob a loop needs

src/core/instrument/ui/sample_chrome.h

@@ -18,7 +18,14 @@ inline constexpr int kBakeButtonWidth = 54;  // the resample-bake trigger
 struct ChromeRects {
     Rect toolbar;     // full-width top row
     Rect title;       // the title text slot: the toolbar left of the control run
-    Rect bake;        // ---- the right-anchored run, left to right ----
+    // The bake Hold cell. Its width is RESERVED unconditionally even though the control is
+    // only load-bearing for a looped Gate sound (bake_plan.h's bakeWindowNeedsHold): the run
+    // is right-anchored, so laying it out conditionally would slide Bake and Preview out from
+    // under the pointer whenever a loop is dialled in or out.
+    Rect holdCell;    // ---- the right-anchored run, left to right ----
+    Rect holdKnob;
+    Rect holdLabel;
+    Rect bake;
     Rect preview;
     Rect velCell;     // preview-velocity knob cell (knob + label band)
     Rect velKnob;