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/engine/src/game.ts

@@ -4578,12 +4578,28 @@ function doPickUpObject(prev: GameState, instanceId: string): CommandResult {
   };
 }
 
+/**
+ * Physical, droppable objects beyond the object-type stones. Rulebook:
+ * "Movable objects include magic stones, treasure chests, the dagger, the
+ * large rock, and the wizardblade" — plus the expansion wands, which the
+ * rules expect to change hands ("its remaining charges go with it";
+ * charges are keyed by instance, so they travel automatically).
+ */
+const MOVABLE_OBJECT_CARD_IDS = new Set([
+  "dagger", "large-rock", "wizardblade",
+  "blaster-wand", "shift-wand", "sticky-wand", "warp-wand",
+]);
+
+export function isMovableObject(cardId: string): boolean {
+  return cardDef(cardId).cardType === "object" || MOVABLE_OBJECT_CARD_IDS.has(cardId);
+}
+
 function doDropObject(prev: GameState, instanceId: string): CommandResult {
   const state = clone(prev);
   const p = activePlayer(state);
   const card = p.hand.find((c) => c.instanceId === instanceId);
   if (!card) return err("card not in hand");
-  if (cardDef(card.cardId).cardType !== "object") return err("only objects can be dropped");
+  if (!isMovableObject(card.cardId)) return err("only objects can be dropped");
   takeFromHand(p, instanceId);
   const key = cellKey(p.position);
   state.groundObjects[key] = [...(state.groundObjects[key] ?? []), card];