Players beside the board with avatar, online status, store count and
clock, the turn between them, a game-over card over the board, and a
move list with the newest move first and tags for extra turns,
captures and store gains. On phones the bottom player is shown below
the board.
- Move list under the board with player, pit and what happened (extra
turn, capture, stones to the store, game over); collapsed on phones
- Selecting a move or using the arrow keys shows that position with a
banner and Back to live; pits are locked meanwhile and the banner says
when it is your turn
- Countdown while the opponent is offline on their turn
- on_game_end is handled, so games that end by timeout or inactivity end
on the page with the reason
