fix: add HTTPS requirement check for camera access

- Check for secure context before attempting camera access
- Show clear user feedback when HTTPS is required
- Prevent confusing permission errors on insecure connections

src/services/QRScanner/WebDialogQRScanner.ts

@@ -41,6 +41,12 @@ export class WebDialogQRScanner implements QRScannerService {
   }
 
   async isSupported(): Promise<boolean> {
+    // Check for secure context first
+    if (!window.isSecureContext) {
+      logger.warn("Camera access requires HTTPS (secure context)");
+      return false;
+    }
+    // Then check for camera API support
     return !!(navigator.mediaDevices && navigator.mediaDevices.getUserMedia);
   }