refactor(qr): improve QR code scanning robustness and error handling

- Enhance JWT extraction with unified path handling and validation
- Add debouncing to prevent duplicate scans
- Improve error handling and logging throughout QR flow
- Add proper TypeScript interfaces for QR scan results
- Implement mobile app lifecycle handlers (pause/resume)
- Enhance logging with structured data and consistent levels
- Clean up scanner resources properly on component destroy
- Split contact handling into separate method for better organization
- Add proper type for UserNameDialog ref

This commit improves the reliability and maintainability of the QR code
scanning functionality while adding better error handling and logging.

src/libs/endorserServer.ts

@@ -86,6 +86,12 @@ export const CONTACT_IMPORT_ONE_URL_PATH_TIME_SAFARI = "/contacts?contactJwt=";
  */
 export const CONTACT_URL_PATH_ENDORSER_CH_OLD = "/contact?jwt=";
 
+/**
+ * URL path suffix for contact confirmation
+ * @constant {string}
+ */
+export const CONTACT_CONFIRM_URL_PATH_TIME_SAFARI = "/contact/confirm/";
+
 /**
  * The prefix for handle IDs, the permanent ID for claims on Endorser
  * @constant {string}