Daggers, rocks, blades, and wands can be set down too

The rulebook's movable-object list is wider than the stones: "magic
stones, treasure chests, the dagger, the large rock, and the
wizardblade" — and the expansion expects wands to change hands, since
"its remaining charges go with it." A new isMovableObject helper in
the engine names that full set, doDropObject honors it, and the hint
bar's "Drop it here" button follows suit. Charges are keyed by card
instance, so a dropped wand carries them to whoever picks it up —
covered by new tests, along with the refusal to drop spell cards.

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

packages/web/src/App.svelte

@@ -5,7 +5,7 @@
   import Help from "./Help.svelte";
   import Replay from "./Replay.svelte";
   import { local } from "./local.svelte";
-  import { allCardDefs, cardDef, isNumberCard, SIDES, stepTarget, cellKey } from "@wizwar/engine";
+  import { allCardDefs, cardDef, isNumberCard, SIDES, stepTarget, cellKey, isMovableObject } from "@wizwar/engine";
   import type { CardInstance, Side } from "@wizwar/engine";
 
   net.connect();
@@ -912,7 +912,7 @@
                 Cast{attachedNumber ? ` with the ${numberTotal}` : ""}
               </button>
             {/if}
-            {#if selectedCard && selectedDef.cardType === "object" && isYourTurn}
+            {#if selectedCard && isMovableObject(selectedCard.cardId) && isYourTurn}
               <button class="stamp tiny" onclick={() => {
                 if (selectedCard) dispatch({ type: "dropObject", instanceId: selectedCard.instanceId });
                 clearSelection();