Refactor scripts: dedup remainder, remove dead code, perf hardening

Iteration 4 over Assets/Scripts (no component/file splits, no Unity assets touched):

Dedup:
- Route inline cursor-release, material guards, Ctrl-held and undo/redo
  input through existing InputUtil / SetMatFloat helpers
- Add ungated InputUtil.KeyPressedThisFrame; GameplayKeyPressed builds on it
- Unify FindDeep/FindDeepChild into GeometryUtil.FindDeep

Dead code / stale docs:
- Remove unused code-gen bake path (HsvColorPicker.Build, PaintHud factory)
- Drop unreferenced symbols (SubPhaseChanged event, LocalPhaseDuration,
  IsLocalSceneMain, MouseSensitivity.Changed, IsPaused, InSession,
  NetworkControlled, PreviousPose, JointCount, voxel-count accessors)
- Fix incorrect PlayerRole / PaintHud / Pick / PlayerPose docs

Perf / robustness (behaviour-neutral):
- ConcealmentMeter.Evaluate: reuse vertex/topology buffers, two-pointer
  crossing count
- BuildMeshCaches: alloc-free vertex copy, cached topology/UVs
- Guard all PlayerPaintSync LogSync sites behind logSync
- Cache LocalViewerIsHunter / controller / CanShoot / TypingGuard lookups;
  dedup LocalIsHunter with MatchHud
- Change-guard RefreshEmissionColor and HeroCutout.Disarm
- Cache scene/countdown string comparisons per frame
- Grow NonAlloc buffers and log-once on saturation

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

Assets/Scripts/PlayerCharacterController.cs

@@ -215,10 +215,10 @@ public class PlayerCharacterController : MonoBehaviour
     private float _verticalVelocity;
     private Vector3 _horizontalVelocity;  // smoothed horizontal move velocity (accel/decel ramp)
     private Vector3 _climbVelocity;       // smoothed along-surface climb velocity (accel ramp for precise placement)
-    private bool _sprinting;              // sprint key state this frame (exposed via IsSprinting)
-    private bool _isIdle;                 // snapshot: player essentially still this frame (exposed via IsIdle)
-    private bool _movingOnGround;         // snapshot: grounded & moving above the run threshold (exposed via IsMovingOnGround)
-    private bool _isFalling;              // snapshot: airborne & descending past the fall threshold (exposed via IsFalling)
+    private bool _sprinting;              // exposed via IsSprinting
+    private bool _isIdle;                 // exposed via IsIdle
+    private bool _movingOnGround;         // exposed via IsMovingOnGround
+    private bool _isFalling;              // exposed via IsFalling
     private float _groundOffset;          // signed vertical mesh raise from the ground mouse pose-adjust (+ up / - down); folded into SetMeshLean
     private Vector3 _spawnPosition;       // world position this avatar spawned at; the rescue (kill-plane) teleport target
     private bool _spawnCaptured;          // false until the first Update captures the spawn position (after OnNetworkSpawn's ring offset has landed)
@@ -256,7 +256,8 @@ public class PlayerCharacterController : MonoBehaviour
     private float _cameraYOffset;         // last camera-target local-up offset written (cached so an unchanged value skips the transform write)
     private float _meshOffsetResidual;    // leftover mesh lean still easing back to 0 after leaving the wall (no longer climbing)
     private Vector3 _meshOffsetExitNormal; // wall normal latched at exit; the residual eases along it (live _wallNormal may shift on stray contact)
-    private readonly RaycastHit[] _wallProbe = new RaycastHit[8];
+    private readonly RaycastHit[] _wallProbe = new RaycastHit[16];
+    private bool _wallProbeSaturated; // log-once: a full buffer can hide the nearest valid wall/ground
 
     // Mantle (top-out) state.
     private const float TopOutRegrabCooldown = 0.3f; // blocks re-grab right after any top-out so holding W tops out cleanly instead of detach/re-grab buzzing
@@ -1038,6 +1039,7 @@ public class PlayerCharacterController : MonoBehaviour
 
         int count = Physics.RaycastNonAlloc(
             origin, dir, _wallProbe, maxDist, ~0, QueryTriggerInteraction.Ignore);
+        WarnIfProbeSaturated(count);
 
         float best = float.MaxValue;
         bool found = false;
@@ -1060,6 +1062,13 @@ public class PlayerCharacterController : MonoBehaviour
         return found;
     }
 
+    private void WarnIfProbeSaturated(int hitCount)
+    {
+        if (hitCount != _wallProbe.Length || _wallProbeSaturated) return;
+        _wallProbeSaturated = true;
+        Debug.LogWarning($"PlayerCharacterController: climb probe buffer saturated ({hitCount}); the nearest surface may be missed.", this);
+    }
+
     /// <summary>
     /// Pulls the character up and over the wall's top edge: phase 1 rises until the
     /// capsule clears the edge, phase 2 moves forward onto the surface, then exits.
@@ -1113,6 +1122,7 @@ public class PlayerCharacterController : MonoBehaviour
 
         int count = Physics.RaycastNonAlloc(
             origin, -_wallNormal, _wallProbe, maxDist, ~0, QueryTriggerInteraction.Ignore);
+        WarnIfProbeSaturated(count);
         for (int i = 0; i < count; i++)
         {
             if (IsPlayerCollider(_wallProbe[i].collider) || IsNoClimb(_wallProbe[i].collider))
@@ -1135,6 +1145,7 @@ public class PlayerCharacterController : MonoBehaviour
 
         int count = Physics.RaycastNonAlloc(
             origin, Vector3.down, _wallProbe, maxDist, ~0, QueryTriggerInteraction.Ignore);
+        WarnIfProbeSaturated(count);
 
         float best = float.MaxValue;
         Vector3 normal = Vector3.up;