Added net worth calculation to track overall progress. The calculateNetWorth function computes total value from credits, ship resale values (at 25% of purchase price), and cargo worth based on current market prices. It returns line items categorized as assets or debts for detailed breakdown.

Improved the ship context handling in the player machine - ships now properly share context with the parent machine for better state coordination. Fixed an issue with location handling when ships are in flight by falling back to the flight plan’s origin location for market lookups.

Cleaned up the UI across multiple components - FlightPlan, Ship, Cargo, and Player all got visual improvements. Also fixed a null cache bug in the location cache with a proper test, and updated the README.