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

e2e/src/web/specs/shared-link.e2e-spec.ts

@@ -45,7 +45,7 @@ test.describe('Shared Links', () => {
     await page.goto(`/share/${sharedLink.key}`);
     await page.getByRole('heading', { name: 'Test Album' }).waitFor();
     await page.locator(`[data-asset-id="${asset.id}"]`).hover();
-    await page.waitForSelector('#asset-group-by-date svg');
+    await page.waitForSelector('[data-group] svg');
     await page.getByRole('checkbox').click();
     await page.getByRole('button', { name: 'Download' }).click();
     await page.getByText('DOWNLOADING', { exact: true }).waitFor();