system.perspective.authenticationChallenge with framing="embedded" should auto-focus popup to enable immediate badge scanning

The current implementation of system.perspective.authenticationChallenge() with framing="embedded" does not automatically focus/select the popup when it opens. This creates a UX friction point and appears as a system malfunction to end users. Using framing="new" would work but is incompatible with Perspective Workstation.

Current behavior:

Popup opens → user scans RFID badge → scan is ignored

User must manually click the popup first → then scan badge → logout succeeds

The non-intuitive behavior appears as a bug or system malfunction, reducing user confidence in the application.

Expected behavior / desired solution:

Popup opens → popup is auto-focused → user scans RFID badge immediately → logout succeeds seamlessly

The popup should receive focus automatically upon opening, allowing RFID badge input to be immediately recognized without requiring a manual click-to-focus action.