refactor: clear local storage and reset UI elements on room leave

public/js/main.js

@@ -230,8 +230,14 @@ function wireUi() {
   });
   wire($leaveRoom, 'click', () => {
     sendMsg({ type: 'leave_room' });
+  // Clear all local storage entries on leave
+  try { localStorage.clear(); } catch {}
   stopAudioPlayback();
     state.room = null;
+  // Reset visible name inputs/labels
+  if ($nameLobby) { try { $nameLobby.value = ''; } catch {} }
+  if ($nameDisplay) { $nameDisplay.textContent = ''; }
+  if ($readyChk) { try { $readyChk.checked = false; } catch {} }
     $lobby.classList.remove('hidden');
     $room.classList.add('hidden');
   });