- Add slugify and generatePresetId utilities with collision handling for unique preset IDs
- Remove manual ID input field from preset editor UI in SettingsModal
- Auto-generate preset IDs server-side from name on creation
- Simplify Header tests by removing ID-related test cases
- Deduplicate tablet header controls tests by importing from shared Header tests
- Remove unused CSS rules for removed ID input field
- Update reviewer to pass through preset ID generation logic