The door can be held open, as both key cards always promised

MASTER KEY and PICK LOCK each read: "You may 'hold the door open' for
others, if you wish" — and the engine always slammed it at end of
turn. Now the cast takes a hold param: the door stays unlocked past
the turn, for anyone, as long as its holder stands adjacent and
alive. A step away, a shove, a teleport, or a killing blow lets it
swing shut — swept after every command, since anything can move a
wizard. New state, new param: no old ledger contains either, so no
rev gate is needed.

The client offers a "hold the door open" checkbox when either card is
selected; a held door shows pale with a green jamb ("held open by a
standing wizard"), and the chronicle records the holding and the
shutting. Pinned: a held door outlives the turn and admits the other
wizard; walking away releases it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/App.svelte

@@ -128,6 +128,8 @@
   let tradeFrom = $state<{ x: number; y: number } | null>(null);
   /** rotate-sector direction. */
   let rotateCW = $state(true);
+  /** pick-lock / master-key: prop the door for others once it opens. */
+  let holdDoor = $state(false);
   /** mega-monster: which stat the chosen monster doubles. */
   let megaBoost = $state<"life" | "movement">("life");
   /** teleport: the marked destination awaiting its confirming second tap. */
@@ -300,6 +302,7 @@
     selectedCreature = null;
     selectedCard = null;
     megaBoost = "life";
+    holdDoor = false;
     pendingTeleport = null;
     attachedNumber = null;
     attachedMods = [];
@@ -713,6 +716,8 @@
       type: "cast",
       instanceId: selectedCard.instanceId,
       target: { kind: "edge", cell, side },
+      ...(holdDoor && (selectedCard.cardId === "pick-lock" || selectedCard.cardId === "master-key")
+        ? { params: { hold: true } } : {}),
       ...(attachedNumber ? { numberInstanceIds: [attachedNumber.instanceId] } : {}),
     });
     clearSelection();
@@ -1550,6 +1555,9 @@
                 onclick={() => (megaBoost = "movement")}>movement</button>
               <span>— then tap the monster</span>
             {/if}
+            {#if selectedCard?.cardId === "pick-lock" || selectedCard?.cardId === "master-key"}
+              <label class="inline"><input type="checkbox" bind:checked={holdDoor} /> hold the door open</label>
+            {/if}
             {#if selectedCard?.cardId === "rotate-sector"}
               <label class="inline"><input type="checkbox" bind:checked={rotateCW} /> clockwise</label>
               <span>— click the sector</span>