Sell before buying

[samdoidge]

Ensure selling junk occurs before purchasing consumables

Problem:
In certain scenarios, purchasing consumables would fail due to insufficient gold, even though selling junk items first would have provided enough gold to complete the purchase.

Solution:

• Reorder operations in the VendorRefill flow to sell junk items before buying consumables.
• This ensures available gold is maximised via sales before initiating purchases.

Impact:
Prevents failed purchases in situations where gold from sold items would cover costs, improving vendor interaction reliability.