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/hooks/timelineEditingHelpers.ts

@@ -128,6 +128,9 @@ export async function persistTimelineEdit(input: PersistTimelineEditInput): Prom
 }
 
 export async function readFileContent(projectId: string, targetPath: string): Promise<string> {
+  if (targetPath.includes("\0") || targetPath.includes("..")) {
+    throw new Error(`Unsafe path: ${targetPath}`);
+  }
   const response = await fetch(
     `/api/projects/${projectId}/files/${encodeURIComponent(targetPath)}`,
   );