docs: complete project research for itinerary editor
Files:
- STACK.md - UITableView drag-drop APIs, SwiftUI bridging patterns
- FEATURES.md - Table stakes UX (lift, insertion line, haptics), polish features
- ARCHITECTURE.md - 5-layer semantic positioning architecture
- PITFALLS.md - Critical pitfalls (row vs semantic, travel as structural)
- SUMMARY.md - Executive synthesis with roadmap implications
Key findings:
- Stack: UITableView + UIHostingConfiguration (existing pattern validated)
- Architecture: Semantic (day, sortOrder) model, not row indices
- Critical pitfall: Row indices are ephemeral; semantic positions are truth
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Trey t
6f09c0abcb