fix(qr): improve QR scanner implementation and error handling

- Implement robust QR scanner factory with platform detection
- Add proper camera permissions to Android manifest
- Improve error handling and logging across scanner implementations
- Add continuous scanning mode for Capacitor/MLKit scanner
- Enhance UI feedback during scanning process
- Fix build configuration for proper platform detection
- Clean up resources properly in scanner components
- Add TypeScript improvements and error wrapping

The changes include:
- Adding CAMERA permission to AndroidManifest.xml
- Setting proper build flags (__IS_MOBILE__, __USE_QR_READER__)
- Implementing continuous scanning mode for better UX
- Adding proper cleanup of scanner resources
- Improving error handling and type safety
- Enhancing UI with loading states and error messages

vite.config.common.mts

@@ -44,6 +44,8 @@ export async function createBuildConfig(mode: string) {
       'process.env.VITE_PLATFORM': JSON.stringify(mode),
       'process.env.VITE_PWA_ENABLED': JSON.stringify(!(isElectron || isPyWebView || isCapacitor)),
       __dirname: isElectron ? JSON.stringify(process.cwd()) : '""',
+      __IS_MOBILE__: JSON.stringify(isCapacitor),
+      __USE_QR_READER__: JSON.stringify(!isCapacitor),
     },
     resolve: {
       alias: {