feat: timeline performance (#16446)

* Squash - feature complete

* remove need to init assetstore

* More optimizations. No need to init. Fix tests

* lint

* add missing selector for e2e

* e2e selectors again

* Update: fully reactive store, some transitions, bugfixes

* merge fallout

* Test fallout

* safari quirk

* security

* lint

* lint

* Bug fixes

* lint/format

* accidental commit

* lock

* null check, more throttle

* revert long duration

* Fix intersection bounds

* Fix bugs in intersection calculation

* lint, tweak scrubber ui a tiny bit

* bugfix - deselecting asset doesnt work

* fix not loading bucket, scroll off-by-1 error, jsdoc, naming

web/src/lib/utils/asset-utils.ts

@@ -476,7 +476,7 @@ export const selectAllAssets = async (assetStore: AssetStore, assetInteraction:
       if (!get(isSelectingAllAssets)) {
         break; // Cancelled
       }
-      assetInteraction.selectAssets(bucket.assets);
+      assetInteraction.selectAssets(bucket.getAssets().map((a) => $state.snapshot(a)));
 
       // We use setTimeout to allow the UI to update. Otherwise, this may
       // cause a long delay between the start of 'select all' and the