- Event/EventReader/EventWriter renamed to Message/MessageReader/MessageWriter
- add_event → add_message for all 67 call sites
- ScrollPosition changed to tuple struct ScrollPosition(Vec2)
- CursorIcon import moved from bevy::winit::cursor to bevy::window
- WindowResolution::from((f32,f32)) removed — use (u32,u32) tuple
- World::send_event → World::write_message in test code
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Introduces solitaire_engine::card_animation — a drop-in upgrade over the
existing linear CardAnim. Supports MotionCurve easing, parabolic z-lift,
scale interpolation, delay, retargeting mid-flight, and per-card timing
variation. Coexists with the legacy AnimationPlugin during migration.
Also adds .claude/ to .gitignore so Claude Code local tooling is never
committed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>