Document all client HTTP calls in docs/API.md, link from README, and delete dead GetPriceItem code. Co-authored-by: Cursor <cursoragent@cursor.com>
Add status footer with logged-in user, improve FOrders filters layout, migrate dialogs to ModernButton, and extend theming with Fluent Win11 palette and auto button styles. Co-authored-by: Cursor <cursoragent@cursor.com>