After each hand of an unfinished match the game now pauses in a new
hand_end phase instead of dealing immediately:
- engine: hand_points gains an 'award' map (which team won each category),
_end_hand stops at hand_end with a deadline, new acknowledge_hand deals
the next hand once all four players have acked; plays are rejected while
the summary is up
- state: acked seats, hand_end_deadline and hand_ack_timeout are persisted
and exposed in the personalized view (also on the finished state, so the
final hand is explained before the result)
- ws: new {"action": "ack"}; a per-hand timer force-deals the next hand
after HAND_ACK_TIMEOUT_SECONDS (new env var, default 30s) so an away
player cannot stall the match
- web: modal explaining each category in plain language with icons (card
images for denara/settebello/primiera), team-coloured rows, running
totals with progress bars, an 'Understood — next hand' button that turns
into 'Waiting for …' plus an auto-continue countdown; the final screen
shows the last hand's breakdown too
Verified in the browser against the compose stack: hand played to
completion, summary rendered (including a carte tie), ack from all four
players dealt the next hand live, and the auto-continue path fired when
nobody acked. 60 backend tests + mypy + cargo tests green.
woggioni
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