An animation is previewed above its timeline: the root at the playhead, drawn but never written (#99)

The Animation tab shows the root asset over the timeline, with every row's value at the
playhead written onto a copy of it – the sprite, text or container placed at the origin as a
scene would place it, a scene as itself. Rows reach the root through that placed object and its
children through the object's instance edits, the route a placed container's content takes,
so the ids match what the runtime gives them. The runtime player and the preview evaluate a row
through one function (trackWriteAt), relative rows included; past the end of a once-reset pass
the preview shows the starting values, as the player would. Play, pause and the ruler drive the
preview through the timeline's playhead; a drag pans, the wheel zooms, Centre frames it. The
document is never touched and undo never hears of scrubbing.

On animation finished no longer describes itself as hearing "a sprite of the owner".

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/core/graph/nodes/events/OnAnimationFinished.ts

@@ -7,7 +7,7 @@ export const OnAnimationFinished: NodeDef = {
   label: 'On animation finished',
   category: 'event',
   description:
-    'Runs once when a sprite of the owner reaches the end of an animation that plays once. Leave Animation at None to hear every animation.',
+    'Runs once when an animation played once on the owner, or on an object below it, reaches its end. Leave Animation at None to hear every animation.',
   inputs: [],
   outputs: [exec(), obj('object')],
   params: [{ key: 'animation', label: 'Animation', kind: 'asset', default: '', assetTypes: ['animation'] }],