fix(physics): #32 L.2c wire edge-slide movement flag

tests/AcDream.Core.Tests/Physics/PhysicsEngineTests.cs

@@ -210,6 +210,27 @@ public class PhysicsEngineTests
         Assert.Equal(0x0009u, result.CellId);
     }
 
+    [Fact]
+    public void ResolveWithTransition_EdgeSlideFlag_AllowsNormalFlatMovement()
+    {
+        var engine = MakeFlatEngine(terrainZ: 50f);
+
+        var result = engine.ResolveWithTransition(
+            currentPos: new Vector3(96f, 96f, 50f),
+            targetPos:  new Vector3(98f, 96f, 50f),
+            cellId: 0x0025u,
+            sphereRadius: 0.5f,
+            sphereHeight: 1.2f,
+            stepUpHeight: 0.4f,
+            stepDownHeight: 0.4f,
+            isOnGround: true,
+            moverFlags: ObjectInfoState.EdgeSlide);
+
+        Assert.True(result.IsOnGround);
+        Assert.InRange(result.Position.X, 97.9f, 98.1f);
+        Assert.Equal(0x0025u, result.CellId);
+    }
+
     [Fact]
     public void ResolveWithTransition_LandblockBoundary_UpdatesFullOutdoorCellId()
     {