refactor(slay-the-spire-like): use IRunContext in combat system

Update the combat system to use `IRunContext` instead of passing
raw inventory objects. This provides a cleaner abstraction for
accessing item data and managing consumed uses.

- Update `canPlayCard` and `payCardCost` to use `IRunContext`
- Pass `IRunContext` through the trigger registration chain
- Fix logic in `canPlayCard` for "uses" cost validation
- Update combat effect tests to use a mock `IRunContext`

src/samples/slay-the-spire-like/system/combat/effects.ts

@@ -145,9 +145,9 @@ export function canPlayCard(
   if (costType === "uses") {
     const item = run.getItemData(itemId);
     if (!item) return false;
-    const maxUses = item?.card.costType === "energy" ? item.card.costCount : 0;
+    const maxUses = item?.card.costType === "uses" ? item.card.costCount : 0;
     const consumed = run.getConsumedUses(itemId);
-    return consumed + costCount <= maxUses;
+    return consumed < maxUses;
   }
   return true;
 }