- Refactor views (Home, NFC, Manual) using LayoutBuilder and...

- Refactor views (Home, NFC, Manual) using LayoutBuilder and SingleChildScrollView to handle keyboard opening and landscape constraints.

- Fix ScannerOverlay calculation logic to prevent rendering errors in landscape mode.

- Update SyncStatusIndicator and QrScannerScreen for better responsiveness and error handling.

- Improve mechanical sympathy across the app