Move with collision reacts along the contact normal: it travels to the surface, stays flush and slides the rest of the move along it with Coulomb friction (the mean of both colliders, a tile counts as 0.5), a circle now rolls over an edge instead of catching on it, pushed dynamic bodies move off along the normal, Move gains the outputs hit, normal x and normal y, an object without its own collider moves freely, and editor run and play share the same path through Solids; contact point and normal come from our own f64 geometry (contactBetween), because Rapier's castShape lands 3e-6 px inside the wall in f32 (#150)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/runtime/systems/BehaviorSystem.ts

@@ -30,7 +30,7 @@ import type { World } from '../World';
 import type { Rapier } from '../physics/engine';
 import { PhysicsSystem } from '../physics/PhysicsSystem';
 import { CollisionSystem } from './CollisionSystem';
-import { bodyOf, type CollisionPair, type CollisionSource } from './solids';
+import { bodyOf, type CollisionPair, type CollisionSource, NOT_BLOCKED } from './solids';
 import { AnimationSystem } from './AnimationSystem';
 import type { Input } from './Input';
 import type { System } from './System';
@@ -563,11 +563,11 @@ export class BehaviorSystem implements System {
       },
       moveAndSlide: (target, dx, dy) => {
         const found = resolve(target);
-        if (!found) return { blockedX: false, blockedY: false };
+        if (!found) return NOT_BLOCKED;
         if (this.collisions) return this.collisions.moveAndSlide(world, found, dx, dy);
         found.x += dx;
         found.y += dy;
-        return { blockedX: false, blockedY: false };
+        return NOT_BLOCKED;
       },
       physics:
         this.collisions instanceof PhysicsSystem