Inventory & Sales Manager

STABILITY & CRASH FIXES • Fixed app crash on Inventory page load (CoreData entity name mismatch) • Fixed POS dashboard showing $0.00 after completing transactions — now updates in real-time • Fixed shopping cart being cleared when navigating back from checkout • Fixed "Complete Sale" button not triggering payment collection NEW FEATURES • Barcode scanner with camera integration — supports 12+ formats (EAN-8/13, UPC-E, Code 128/39/93, QR, PDF417, Aztec, ITF-14, Data Matrix) • Full category management: create, edit, and delete product categories with dynamic pickers • Full supplier management: 18+ fields including contact persons, payment terms, ratings, and tax IDs • Professional receipt PDF generation and sharing via email, messaging, or AirDrop • Smart app rating prompt with optimal timing after key milestones IMPROVEMENTS • Customer details now displayed in POS transaction history (name, company, email, phone) • Stock adjustments track the authenticated user instead of generic "iOS User" • Category names display correctly in Inventory Item Detail (no more placeholder text) • Proper error alerts for refund operations with user-friendly messages LOCALIZATION • Full support for 11 languages: English, Spanish, French, German, Dutch, Russian, Danish, Japanese, Chinese (Simplified & Traditional), Spanish (US) • 4,000+ localization keys with type-safe translation system TECHNICAL • Swift 6 concurrency safety (async/await, @MainActor) • Improved CoreData thread handling for reliable data persistence • Offline-first architecture with background cloud sync