CardPicker propagated null into onChange when no card was selected yet,
so the board picker's parent coerced every first pick to 2 of spades and
the hole-card pickers could never hold a value, keeping Queue hand
disabled forever. Picks now build a complete card, preserving any
already-chosen half, with regression tests on the extracted helper.
Co-authored-by: Sisyphus <sisyphus@ohmyopencode.dev>
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>
