- Add isAssociatedWithCurrentPreset() helper to check if entity is associated with the CURRENT preset (not just any preset)
- Fix checkbox to correctly reflect association with currently selected preset
- Introduce tempAssociation state to track pending association changes
- Only save association changes when clicking Save & Apply, not on preset switch
- Discard pending association changes when clicking X/Cancel
- Auto-update association when switching presets if checkbox was checked
- Improve toast messages to clarify when changes will be applied
Fixes issue where checkbox showed incorrect state and association was saved immediately without waiting for Save & Apply.