Add QR code scanning for access checks

[Lakes41]

The roadmap includes QR gating for physical event access. Add a QR scanning flow that can populate access check fields from a scanned QR code.

Suggested tasks

• Add camera permission handling
• Add a QR scanner screen
• Define the expected QR payload format
• Parse guild ID and resource ID from scanned data
• Navigate back to the access check screen with populated values
• Show errors for invalid QR payloads

Acceptance criteria

• Users can scan a QR code for access checks
• Valid QR payloads populate the correct fields
• Invalid QR codes show a clear error

[GBOYEE]

Hey! I can work on this. I will add QR code scanning for access checks using the current Expo Camera API. PR in a few hours.

[gloskull]

Hi, I’d love to work on this issue. I have 4 years of experience across backend, frontend, full-stack, and smart contract development. I understand the task clearly and can deliver a clean, efficient, well-tested solution on time, with strong focus on code quality and maintainability. My PR will be submitted in under 10 hours.