## Summary
- Mark landing position corrections as presentation discontinuities.
- Render and frame fighters from the current position for the snap frame.
- Keep previous translation history unchanged for gameplay collision and attack logic.
Reviewed-on: #67
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>
## Summary
- add a rollback-tracked `FighterSurfaceState` as the single source of truth for stage contact
- move active stage line ownership out of individual grounded fighter states
- update landing, airborne motion, ledge departure, hit reactions, and debug save states to maintain surface contact
- add tests for contact lifecycle, connected-segment traversal, and ledge departure
Reviewed-on: #60
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>
Fixes#22
Extracts shared grounded collision/friction and airborne movement/landing policies while preserving state-specific behavior. Running fighters now pass `can_walk_off = true` so they can run off platform edges. Includes grounded and airborne hitstun call sites.
Reviewed-on: #36
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>
EIREXE
eirexe-test