Fix delete item API MongoDB query - Fix sections.$.items to sections.$[].items for proper array update

main.py

@@ -1031,8 +1031,8 @@ async def delete_checklist_item(user_id: str, item_id: str):
         
         # Remove the item from the checklist
         result = await db.checklists.update_one(
-            {"userId": user_id, "sections.items.id": item_id},
-            {"$pull": {"sections.$.items": {"id": item_id}}}
+            {"userId": user_id},
+            {"$pull": {"sections.$[].items": {"id": item_id}}}
         )
         
         if result.modified_count > 0: