Verify that users can configure and view cost data in different currencies.

Related issue: FLPATH-2731

Test Steps:
1. Navigate to the cost management view
2. Locate the currency settings
3. Verify default currency is displayed
4. Change currency to a different option
5. Verify all cost values update to reflect the new currency
6. Check currency symbol is displayed correctly
7. Verify currency setting persists across sessions

Expected Results:

• Currency settings are accessible
• Currency can be changed successfully
• All cost values display in selected currency
• Currency symbol is correct (e.g., $, €, £)
• Settings persist after page refresh
• UI matches Figma design specifications