- Add TipModalView with gradient header, themed styling, and spring animations
- Create FeelsTipsManager with global toggle, session tracking, and persistence
- Define FeelsTip protocol and convert all 7 tips to new system
- Add convenience view modifiers (.customizeLayoutTip(), .aiInsightsTip(), etc.)
- Remove TipKit dependency from all views
- Add Tips Preview debug screen in Settings to test all tip modals
- Update documentation for new custom tips system
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>