[chore] refactor user preferences (#1435)

- Remove TLUser, TLUserPresence
- Add first-class support for user preferences that persists across
rooms and tabs

### Change Type

<!-- 💡 Indicate the type of change your pull request is. -->
<!-- 🤷‍♀️ If you're not sure, don't select anything -->
<!-- ✂️ Feel free to delete unselected options -->

<!-- To select one, put an x in the box: [x] -->

- [ ] `patch` — Bug Fix
- [ ] `minor` — New Feature
- [x] `major` — Breaking Change
- [ ] `dependencies` — Dependency Update (publishes a `patch` release,
for devDependencies use `internal`)
- [ ] `documentation` — Changes to the documentation only (will not
publish a new version)
- [ ] `tests` — Changes to any testing-related code only (will not
publish a new version)
- [ ] `internal` — Any other changes that don't affect the published
package (will not publish a new version)

### Test Plan

1. Add a step-by-step description of how to test your PR here.
2.

- [ ] Unit Tests
- [ ] Webdriver tests

### Release Notes

- Add a brief release note for your PR here.

packages/ui/src/lib/hooks/useMenuSchema.tsx

@@ -49,7 +49,7 @@ export function MenuSchemaProvider({ overrides, children }: MenuSchemaProviderPr
 	const breakpoint = useBreakpoint()
 	const isMobile = breakpoint < 5
 
-	const isDarkMode = useValue('isDarkMode', () => app.userDocumentSettings.isDarkMode, [app])
+	const isDarkMode = useValue('isDarkMode', () => app.isDarkMode, [app])
 	const isGridMode = useValue('isGridMode', () => app.userDocumentSettings.isGridMode, [app])
 	const isSnapMode = useValue('isSnapMode', () => app.userDocumentSettings.isSnapMode, [app])
 	const isToolLock = useValue('isToolLock', () => app.instanceState.isToolLocked, [app])