Persist player and third-person camera state across sessions

Add player position/rotation/wall-climb persistence and camera
orbit (yaw/pitch/radius) persistence, auto-saved on quit/play-stop
and auto-loaded on start. Also includes the wall-climb fixes
(directional top-out, base detach on push-away).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scripts/PlayerCharacterController.cs

@@ -27,7 +27,7 @@ using UnityEngine.InputSystem;
 /// </summary>
 [RequireComponent(typeof(CharacterController))]
 [DisallowMultipleComponent]
-public class PlayerCharacterController : MonoBehaviour
+public partial class PlayerCharacterController : MonoBehaviour
 {
     [Header("Movement")]
     [Tooltip("Horizontal movement speed (units/second).")]
@@ -428,7 +428,10 @@ public class PlayerCharacterController : MonoBehaviour
         if (found && !onCeiling && _climbLeftGround
             && Vector3.Angle(_wallNormal, Vector3.up) < wallMinAngle)
         {
-            TopOutDetach(); // climbed face flattened into walkable: hop over the lip instead of dropping onto the steep section below
+            // Hop over the lip only when actually moving up onto the flattened face (a real
+            // top-out); if we reached it going down, just step off cleanly with no hop.
+            if (v > 0f) TopOutDetach();
+            else ExitWallClimb();
             return;
         }
 
@@ -530,17 +533,27 @@ public class PlayerCharacterController : MonoBehaviour
 
         _controller.Move(velocity * dt);
 
-        // Reaching walkable ground detaches and drops back to normal grounded movement. Gated
-        // on having left the ground first, so grabbing a wall at its base (still grounded)
-        // doesn't instantly detach. We test for walkable ground under the feet rather than
-        // trusting isGrounded: the standoff correction can lift the capsule just off the
-        // surface, so at a slope's top isGrounded stays false and the old check never fired.
+        // Reaching walkable ground detaches back to normal grounded movement. The top-out hop
+        // (carry over the lip) fires ONLY when topping out upward over an edge (v > 0). Arriving
+        // at the floor by descending, OR pressing down/away (S, v < 0) at the wall's base while
+        // grounded, just lets go cleanly with no hop -- the latter is the only detach path that
+        // doesn't require having left the ground first, so a wall grabbed at its base can be
+        // released by pressing away. We test walkable ground under the feet rather than trusting
+        // isGrounded: the standoff correction can lift the capsule just off the surface, so at a
+        // slope's top isGrounded stays false and the old check never fired.
         bool onWalkableGround = _controller.isGrounded || WalkableGroundBelow();
         if (!onWalkableGround)
-            _climbLeftGround = true;
-        else if (_climbLeftGround)
         {
-            TopOutDetach(); // reached walkable ground at the top: hop up onto it instead of sliding back down the face
+            _climbLeftGround = true;
+        }
+        else if (_climbLeftGround && v > 0f)
+        {
+            TopOutDetach(); // topped out upward onto walkable ground: hop over the lip (holding W carries on)
+            return;
+        }
+        else if (_climbLeftGround || v < 0f)
+        {
+            ExitWallClimb(); // descended to the floor, or pulling down/away at the base: let go, no hop
             return;
         }