fix(storefront): complete the cart line-item chain

postman/collections/Fleetbase Storefront API/Cart/Add Item to Cart.request.yaml

@@ -14,4 +14,15 @@ body:
       "quantity": 1,
       "variants": []
     }
+scripts:
+  - type: afterResponse
+    code: |-
+      // Update item in Cart and Remove item from cart address {{line_item_id}} —
+      // the cart ITEM id (cart_item_*), not the product id. Nothing set it.
+      var json_response = pm.response.json();
+
+      if (Array.isArray(json_response.items) && json_response.items.length) {
+          pm.environment.set("line_item_id", json_response.items[0].id);
+      }
+    language: text/javascript
 order: 1000

postman/collections/Fleetbase Storefront API/Cart/Remove item from cart.request.yaml

@@ -1,9 +1,6 @@
 $kind: http-request
 description: |-
   Removes a line item or product from a cart. The response returns the updated cart after the item is removed.
-url: "{{base_url}}/{{api_prefix}}/{{namespace}}/carts/{id}/{line_item_id}"
+url: "{{base_url}}/{{api_prefix}}/{{namespace}}/carts/{{cart_id}}/{{line_item_id}}"
 method: DELETE
-pathVariables:
-  id: ""
-  line_item_id: ""
 order: 4000

postman/collections/Fleetbase Storefront API/Cart/Update item in Cart.request.yaml

@@ -1,10 +1,17 @@
 $kind: http-request
-description: |+
-  You can update all properties of the Zone.
-
-url: "{{base_url}}/{{api_prefix}}/{{namespace}}/carts/{id}/{line_item_id}"
+description: |-
+  Updates a line item already in the cart. Send any of `quantity`, `variants`,
+  `addons` or `scheduled_at`; omitted fields are left unchanged. The response
+  returns the updated cart.
+url: "{{base_url}}/{{api_prefix}}/{{namespace}}/carts/{{cart_id}}/{{line_item_id}}"
 method: PUT
-pathVariables:
-  id: ""
-  line_item_id: ""
+headers:
+  - key: Content-Type
+    value: application/json
+body:
+  type: json
+  content: |-
+    {
+      "quantity": 2
+    }
 order: 3000