rummy: gin, 10-card and a variant picker

[aaylward]

UI for MoonBase#1610. Deploy this before MoonBase#1613: it works against the current hub, which doesn't send canDrawDiscard.

• Dealer's choice: the dealer picks the game from one list with one Deal button, instead of a button per variant.
  • The list starts at the last deal's game, and a pick holds only for its own deal.
  • It is hidden when only one game is offered.
  • It is in the deal-end sheet's tab order.
• Gin at the table:
  • Take or pass the upcard.
  • Stock only once both players pass.
  • No melding.
  • Knock is enabled only when the chosen throw leaves 10 or less deadwood, and never on the card just taken. The hint says what the throw would leave.
• Deal-end sheet: shows both hands as the hub arranged them, plus any lay-offs.
• Hand: new by melds sort.
• Parity: bestArrangement replays MoonBase's arrange_corpus.json (a copy lives here).
• Stats: new label gin.

Checked with vitest, tsc and eslint. One gin deal was played end to end in a browser against a local hub, with one seat at phone size. The wider lobby and table UX work is tracked in #389.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	muchq	6e7e568	Commit Preview URL Branch Preview URL	Sep 29 2026, 03:04 PM

[cursor]

Blocking

None. Wire matches MoonBase rummy.smithy (upcard / pass / knock / canDrawDiscard / lastDeal.gin); older hubs without canDrawDiscard keep the discard drawable while it has a top; knock is gated on canDiscard (so the just-taken card can’t be knocked) and bestArrangement ≤ 10; melds stay off the gin felt; the deal-end sheet reads the hub’s arranged hands and lay-offs; the variant list is one pick + one Deal, scoped to its deal, hidden when there’s only one option, and inside the sheet’s tab loop. Ace high/low (never wrapping) is pinned for lay-offs and knocks. CI green.

Nits

• VARIANT_LABELS drops basic entirely. The PR’s own rollout is UI-first against a hub that still deals basic, so the Deal button becomes “Deal basic” until MoonBase#1613 is live. Keep an alias (basic: '7-card rummy' or the old “Basic rummy”) for that window.
• Copied arrange_corpus.json includes a layOff section nothing replays. Fine if the file is meant to stay a verbatim MoonBase copy; otherwise trim it or note that only arrange is the TS parity surface (the hub owns lay-offs at knock).
• When a knock is armed, Discard stays primary and Knock secondary — easy to throw a knockable hand. Prefer Knock as primary (or equal weight) while mayKnock.

Fine

Dealer’s-choice list + Deal; gin upcard take/pass with stock held until both pass; deadwood hint on the selected throw; by melds sort; stats gin label; docs note against scheduled PR check-ins. MoonBase#1613 is already merged — deploy this so a gin table’s hub view has chrome that understands it. Wider lobby/table polish stays in #389.

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Review of #390

[aaylward]

Nits, in 6e7e568:

• basic now labels as "7-card rummy", which covers a hub that hasn't been redeployed yet.
• An armed knock is now the primary button, with Discard secondary. Both are pinned.
• arrange_corpus.json stays a verbatim copy of MoonBase's. Only its arrange cases are replayed here, because the hub owns lay-offs at the knock.

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