psychedelicious cdd8b60fd0 feat(ui): move ephemeral state into canvas classes
Things like `$lastCursorPos` are now created within the canvas drawing classes. Consumers in react access them via `useCanvasManager`.

For example:
```tsx
const canvasManager = useCanvasManager();
const lastCursorPos = useStore(canvasManager.stateApi.$lastCursorPos);
```
2024-08-26 19:14:56 +10:00
..
2024-03-26 14:48:29 +11:00
2023-07-28 09:46:44 -04:00