[BUG] Policy not in USD error

We stopped checking the policy currency when the user selects a bank account for Travel invoicing before actually calling the API.

<img width="1500" height="496" alt="Image" src="https://github.com/user-attachments/assets/1f3da56a-5930-4400-a283-5fb07cf58db9" />

<details><summary>Issue Owner</summary>Current Issue Owner: @ikevin127</details>