Tune player X-ray pulse and paint padding

Author X-ray pulse shape/speed on Player.mat and raise seam padding
texels on Player.prefab.

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

Assets/Prefabs/Player.prefab

@@ -223,7 +223,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: d5a57f767e5e46a458fc5d3c628d0cbb, type: 3}
   m_Name: 
   m_EditorClassIdentifier: Unity.Netcode.Runtime::Unity.Netcode.NetworkObject
-  GlobalObjectIdHash: 1963377418
+  GlobalObjectIdHash: 459555553
   InScenePlacedSourceGlobalObjectIdHash: 0
   DeferredDespawnTick: 0
   Ownership: 1
@@ -513,7 +513,7 @@ MonoBehaviour:
   previewOpacity: 1
   textureSize: 1024
   baseColor: {r: 0.8, g: 0.8, b: 0.8, a: 1}
-  paddingTexels: 2
+  paddingTexels: 8
   paintCamera: {fileID: 0}
   updateColliderEveryFrame: 1
   previewShader: {fileID: 0}