修复装备系统不扣除物品的bug

Plugins/WPSCombatSystem/combat_service.py

@@ -86,6 +86,13 @@ class CombatService:
         )
         self._db.conn.commit()
 
+        # 6. 扣除装备物品
+        backpack.set_item_quantity(user_id, item_id, backpack.add_item(user_id, item_id, 0) - 1)
+
+        # 7. 恢复被卸下的装备
+        if old_equipped:
+            backpack.add_item(user_id, old_equipped, 1)
+        
         result_msg = f"✅ 已装备 {equipment.name}"
         if old_equipped and old_equipped != item_id:
             old_eq = EQUIPMENT_REGISTRY.get(old_equipped)
@@ -132,6 +139,10 @@ class CombatService:
         )
         self._db.conn.commit()
 
+        # 8. 恢复被卸下的装备
+        backpack: WPSBackpackSystem = Architecture.Get(WPSBackpackSystem)
+        backpack.add_item(user_id, old_item_id, 1)
+        
         return True, f"✅ 已卸下 {old_name}"
     
     def get_equipped_items(self, user_id: int) -> Dict[str, Optional[EquipmentDefinition]]: