Add Manual Price Override Functionality for Prop Account Costs

Users need the ability to manually update or override the displayed prop account cost when the automatically pulled price data is incorrect or outdated. This feature should include an "Edit Price" button or similar interface element that allows users to input the correct cost for their prop firm accounts, ensuring accurate portfolio valuation and cost tracking. The system should maintain both the original price (for reference) and the user-corrected price, with clear indication of which value is being displayed and when it was last updated by the user.

Original post by San The Trader:

https://discord.com/channels/1398423459662663820/1398660697172348938/1405809265444261939