Show garbage received on player elimination

- Add garbageReceived array to player objects
- Track garbage in addGarbageToPlayer() with sender name
- Include garbageReceived in getStates() output
- Update endGame() to pass garbage stats to UI
- Update showGameOver() to display garbage count per player
- Add CSS styling for eliminated players and garbage column
- Bump CSS version for cache refresh

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/index.js

@@ -115,7 +115,8 @@ io.on('connection', (socket) => {
       eliminated: false,
       ready: false,
       dropCounter: 0,
-      dropInterval: 1000
+      dropInterval: 1000,
+      garbageReceived: []
     };
 
     lobby.players.set(socket.id, player);
@@ -479,6 +480,9 @@ function addGarbageToPlayer(player, senderName) {
   garbageRow[gap] = 0;
   player.board.push(garbageRow);
 
+  // Track garbage received
+  player.garbageReceived.push({ rows: 1, sender: senderName });
+
   // Push current piece up by 1 row if it exists (y decreases when moving up)
   if (player.currentPiece) {
     const oldY = player.currentPiece.y;
@@ -519,6 +523,7 @@ function startGame() {
     player.dropInterval = 1000;
     player.holdPiece = null;
     player.canHold = true;
+    player.garbageReceived = [];
     lobby.playerSequenceIndex.set(player.id, 0);
   }
 
@@ -578,7 +583,8 @@ function getStates() {
     lines: p.lines,
     level: p.level,
     eliminated: p.eliminated,
-    sequenceIndex: lobby.playerSequenceIndex.get(p.id) || 0
+    sequenceIndex: lobby.playerSequenceIndex.get(p.id) || 0,
+    garbageReceived: p.garbageReceived ? JSON.parse(JSON.stringify(p.garbageReceived)) : []
   }));
 }