## Why
Saving an Effects preference refreshes the picker. When users toggle repeatedly before saves finish, that refresh can discard newer choices and cause subsequent toggles to use stale values.
## What changed
- Update Effects checkboxes immediately and track pending saves per row, preserving newer choices when an earlier save takes effect.
- Preserve pending Composer stars choices while Animations disables the row, and clear pending state on a regular panel refresh.
- Use the shared list toggle handling for Effects, including Space support, while giving configured key bindings precedence over Space toggling.
## Testing
Add regression tests for repeated toggles across save refreshes, pending Composer stars choices while disabled, clearing pending state, and a Space cancel binding taking precedence over toggling. Update the Effects picker snapshot.
GitOrigin-RevId: 847dcc2dfd40448c7adc56c8c40879db28b1fc39
Felipe Coury
92caad7828