fix(studio): keyframe bug fixes — gate delete hooks, fix value corruption, gesture recording (#1314)

- Gate stripStudioEditsFromTarget/bakeVisibilityOnDelete behind a
  stripStudioEdits flag on the delete mutation type so they only fire on
  user-initiated deletes, not on internal delete-then-recreate drags.

- Add bakeVisibilityOnDelete to the remove-all-keyframes handler so
  elements with CSS opacity:0 stay visible after collapsing keyframes.

- Fix integer rounding in readAllAnimatedProperties: use 3-decimal
  precision for visual properties (opacity, scale, rotation) instead of
  Math.round which corrupted mid-fade values to 0.

- Guard VISUAL_BASELINE against cross-tween contamination by querying
  __timelines for properties animated by other tweens on the same element.

- Harden bakeVisibilityOnDelete: reverse-scan keyframes for the last one
  containing opacity, guard against relative values (+=/-=/*=), and add
  Number.isFinite check.

- Fix falsy-zero doubling in drag commit: replace || fallback with
  Number.isFinite so a base GSAP position of 0 is correctly preserved.

- Fix gesture recording sign inversion: remove pointerElementOffset
  subtraction from dx/dy formula and instead apply it once to basePosition
  so the element center tracks the pointer.

- Fix TypeScript build errors in gsapSoftReload.ts (6 double-casts).

- Strip all diagnostic logs from production code.

packages/studio/src/components/editor/useLayerDrag.ts

@@ -138,9 +138,6 @@ export function useLayerDrag({
       const container = scrollContainerRef.current;
       if (!container) return;
 
-      e.preventDefault();
-      container.setPointerCapture(e.pointerId);
-
       dragRef.current = {
         pointerId: e.pointerId,
         startY: e.clientY,
@@ -163,6 +160,12 @@ export function useLayerDrag({
       if (!drag.activated) {
         if (Math.abs(e.clientY - drag.startY) < DRAG_THRESHOLD_PX) return;
         drag.activated = true;
+        const container = scrollContainerRef.current;
+        if (container && drag.pointerId != null) {
+          try {
+            container.setPointerCapture(drag.pointerId);
+          } catch {}
+        }
         setDragKey(visibleLayers[drag.dragLayerIndex]?.key ?? null);
       }