Adds a three-state poll control card (Start Poll / End Poll / Poll Result) with an LED-style stopwatch on the End Poll button. Shows the current poll leader from downstream poll.leading WebSocket messages. On poll end, prompts the admin to use the winner as the next game choice or ignore it. Restores poll state from the session on page load for continuity across reloads. Co-authored-by: Cursor <cursoragent@cursor.com>