Timeline and Effect Controls value editors sent every write with the property's scrub merge
key, so two separate picks from a drop-down (or two check box toggles) on the same property
folded into one undo step. Drop-down, check box, layer and mask picks now record their own
step; scrubs and typed numbers still merge as before.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Reconcile main 991904888a and preserve the reviewed lifecycle, IME, rendering and lockfile changes.
Formatting, strict lint, layers, assets and WASM passed. Full CI retained 3,961 passes, 14 baseline-matching GPU failures and 31 ignored executions. The local review commit has explicit approval to retain these documented failures; native/browser acceptance and paired app performance remain open.
