feat: update playerId handling and improve room rendering logic

src/server/game.js

@@ -127,13 +127,17 @@ export function setupWebSocket(server) {
             if (foundRoom.state.spectators) delete foundRoom.state.spectators[found.id];
             found.spectator = false;
           }
-          // Notify room
-          broadcast(foundRoom, 'room_update', { room: roomSummary(foundRoom) });
         }
-        // Send resume result and an explicit connected that preserves their original session.
+        // Send resume result and an explicit connected that preserves their original session
+        // BEFORE broadcasting room_update. This ensures the client sets playerId before
+        // rendering the first room snapshot.
         send('resume_result', { ok: true, playerId: found.id, roomId: foundRoom?.id });
         helloSent = true;
         send('connected', { playerId: found.id, sessionId: found.sessionId });
+        if (foundRoom) {
+          // Now notify the room (and the resumed client) of the updated presence
+          broadcast(foundRoom, 'room_update', { room: roomSummary(foundRoom) });
+        }
         return;
       }