Functional Staff QR Scanner

[01amine]

Description

Transform the existing QR UI into a functional staff tool for event entry management.

Tasks

• Connect QrCodeScanner in features/qr_code_scan to a business logic component (Cubit).

• When a QR is scanned, call POST /attendees/check-in.

• Implement a Result Screen/Modal:

1. Success: Vibrate + Green checkmark + "Checked in: [Attendee Name]".

2. Failure: Red alert + "Invalid QR" or "Already Checked In".

• Allow staff to select a "Checkpoint" before they start scanning (e.g., "Main Entrance", "VIP Lounge").