fix(physics): port retail slope landing stop

src/AcDream.Runtime/Gameplay/PlayerMovementController.cs

@@ -1841,6 +1841,11 @@ public sealed class PlayerMovementController
         for (int qi = 0; qi < quantumBatch.Count; qi++)
         {
             float tickDt = quantumBatch.GetQuantum(qi);
+            bool captureQuantum = PlayerPhysicsQuantumCapture.IsEnabled;
+            uint captureCellBefore = CellId;
+            PlayerPhysicsBodyTraceSnapshot captureQuantumStart = captureQuantum
+                ? PlayerPhysicsQuantumCapture.Snapshot(_body)
+                : default;
 
             // CPhysicsObj::UpdatePositionInternal (0x00512C30): visible objects
             // advance their PartArray first. The complete Frame survives; only its
@@ -1931,7 +1936,13 @@ public sealed class PlayerMovementController
             }
 
             _body.calc_acceleration();
+            PlayerPhysicsBodyTraceSnapshot capturePreIntegration = captureQuantum
+                ? PlayerPhysicsQuantumCapture.Snapshot(_body)
+                : default;
             _body.UpdatePhysicsInternal(tickDt);
+            PlayerPhysicsBodyTraceSnapshot capturePostIntegration = captureQuantum
+                ? PlayerPhysicsQuantumCapture.Snapshot(_body)
+                : default;
 
             // Retail process_hooks is the final UpdatePositionInternal step:
             // after physics, before the transition and manager tail.
@@ -2121,6 +2132,30 @@ public sealed class PlayerMovementController
                 _motion.CheckForCompletedMotions,
                 PositionManager);
 
+            if (captureQuantum)
+            {
+                PlayerPhysicsQuantumCapture.Log(
+                    tickDt,
+                    captureCellBefore,
+                    CellId,
+                    input,
+                    capturePreIntegration.Position - captureQuantumStart.Position,
+                    candidateMoved,
+                    captureQuantumStart,
+                    capturePreIntegration,
+                    capturePostIntegration,
+                    new PlayerPhysicsResolveTraceSnapshot(
+                        resolveResult.Position,
+                        resolveResult.CellId,
+                        resolveResult.Ok,
+                        resolveResult.IsOnGround,
+                        resolveResult.InContact,
+                        resolveResult.OnWalkable,
+                        resolveResult.CollisionNormalValid,
+                        resolveResult.CollisionNormal),
+                    PlayerPhysicsQuantumCapture.Snapshot(_body));
+            }
+
         }
 
         // ── 4. Determine outbound motion commands ─────────────────────────────