Change HubSpot deal line items and see the new total first

**Objective:** Apply `{changes}` to the line items on the deal `{deal-name}`.

**Step 1: Resolve the deal**

Call `hubspot-get-deals` with `deal-name.contains` = `{deal-name}`. If none or several match, list them and stop. Keep its `record-id` and `amount`.

**Step 2: Read the line items**

Call `hubspot-get-deal-line-items` with `deal-id` = the deal's record-id. If there are none, say so and stop.

**Step 3: Map the changes**

Match each change in `{changes}` to a line item by name or SKU. Supported changes: `quantity`, `price` (unit price) and `discount-percentage`. If a change matches no line item or several, ask which and stop.

**Step 4: Confirm**

Show a table per affected line: name, SKU, field, old value, new value, old and new net price. Show the deal's current amount and the expected new total. Wait for an explicit yes.

**Step 5: Update**

Call `hubspot-update-deal-line-item` once per affected line with `id` = its record-id and only the changed fields.

**Step 6: Verify and report**

Call `hubspot-get-deal-line-items` again for the deal and report the stored values and new total. If the deal's `amount` does not follow the line items in this portal, say so; do not update the deal yourself.

**Rules & Guidelines:**

* Only `hubspot-update-deal-line-item` may write, once per affected line, after Step 4.
* Do NOT call any other write tool: no other hubspot-add, hubspot-update, hubspot-rename, hubspot-remove, hubspot-subscribe, hubspot-unsubscribe or hubspot-import tool.
* Never add or remove line items in this prompt; `hubspot-add-deal-line-item` cannot link a new item to the deal.

**Validation:**

* If a requested change is to something other than quantity, price or discount, say it is not supported here and leave it out.