Table components, popup system, dev panel, and the actions/page wiring, with popup, table, and dev-control tests.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Snapshot diffs surface fold, check, bet, call, raise, all-in, and pot-win text over each seat, leavers announce centrally, and new hands open with a small-blind then big-blind sequence before the first real turn. Popups fire exactly once per event with reduced-motion fallbacks.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
