Fix game over condition and garbage row placement

- Remove premature elimination in addGarbageToPlayer (top rows check)
- Remove redundant y < 0 elimination check in lockPiece
- Players are only eliminated when spawnPiece fails (board full)
- Garbage rows now added to bottom of board, pushing blocks up

server/index.js

@@ -250,8 +250,6 @@ function lockPiece(player) {
     }
   }
 
-  if (player.currentPiece.y <= 0) player.eliminated = true;
-
   const rowsCleared = clearRows(player);
 
   if (!spawnPiece(player)) player.eliminated = true;
@@ -293,19 +291,12 @@ function sendGarbage(sender, rowsCleared) {
 }
 
 function addGarbageToPlayer(player) {
-  player.board.pop();
+  // Remove top row and add garbage to bottom
+  player.board.shift();
   const garbageRow = Array(BOARD_WIDTH).fill(GARBAGE_COLOR);
   garbageRow[Math.floor(Math.random() * BOARD_WIDTH)] = 0;
-  player.board.unshift(garbageRow);
-
-  for (let row = 0; row < 2; row++) {
-    for (let col = 0; col < BOARD_WIDTH; col++) {
-      if (player.board[row][col] !== 0) {
-        player.eliminated = true;
-        return;
-      }
-    }
-  }
+  player.board.push(garbageRow);
+  // Elimination is handled by spawnPiece when a new piece can't fit
 }
 
 function startGame() {