Radar-/Ping-HUD Szenen-Setup + Lobby-Material

Main.unity: Ping-Time-TMP-Objekt angelegt und am MatchHud verdrahtet
(_pingTimeText), radarPingInterval 30 / radarPingLifetime 3, radarCamera.
Lobby.unity: Material-Swap.

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

Assets/Scenes/Lobby.unity

@@ -744,7 +744,7 @@ MeshRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: 2100000, guid: 31321ba15b8f8eb4c954353edc038b1d, type: 2}
+  - {fileID: 2100000, guid: 284ac320f0449154dae9b92d90f5550b, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0