Add optional short alliance victory

components/game-table.tsx

@@ -2104,6 +2104,9 @@ export function GameTable({
           {g.status === 'playing' && <MixedBidPromises game={g} send={act} busy={busy} />}
           {g.status === 'playing' && <MixedBattlePromises game={g} />}
           {g.status === 'playing' && <FutureBattleLeaderPromises game={g} />}
+          {g.status === 'playing' && g.shortAllianceVictory && <p className="notice">
+            Optional alliance rule: a two-member alliance wins with three strongholds when at least three people or AI controllers are playing. Two-controller games retain their four-stronghold target.
+          </p>}
           {g.status === 'playing' && <MixedTraitorPromises game={g} />}
           {g.status === 'playing' && <TravelPromises game={g} busy={busy} act={act} />}
           {g.status === 'playing' && <TurnActionPromises game={g} busy={g.semutaReaction &&
@@ -2244,6 +2247,11 @@ export function GameTable({
                 g.players.some(player => player.faction === 'choam') && <p className="notice">
                   Printed Kull is inactive in this lobby. Its preview requires a supported {g.advanced ? 'Advanced' : 'Basic'} configuration and may need different module selections.
                 </p>}
+              <label className="checkbox-row">
+                <input type="checkbox" checked={g.shortAllianceVictory} disabled={busy || g.host !== me.id}
+                  onChange={(e) => act({type: 'shortAllianceVictory', enabled: e.target.checked})} />
+                Optional: two-member alliances win with three strongholds (three or more controllers)
+              </label>
               <label className="checkbox-row">
                 <input
                   type="checkbox"