Add player name visibility toggle and enhance display logic in lobby and results screens

server/game.js

@@ -28,7 +28,8 @@ class GameManager {
       settings: {
         songsPerPlayer: 3,
         maxPlayers: 10,
-        minPlayers: 3
+        minPlayers: 3,
+        hidePlayerNames: false
       },
       players: [{
         id: hostId,
@@ -225,6 +226,11 @@ class GameManager {
       return { error: 'Max players must be between 3 and 20' };
     }
     
+    // Validate boolean settings
+    if (settings.hidePlayerNames !== undefined && typeof settings.hidePlayerNames !== 'boolean') {
+      settings.hidePlayerNames = Boolean(settings.hidePlayerNames);
+    }
+    
     // Update settings
     lobby.settings = {
       ...lobby.settings,