[FE-03] Biometric check-in: frontend UI using WebAuthn API

[yusuftomilola]

Overview

The check-in page at frontend/app/check-in/page.tsx is manual-form-based only. Biometric clock-in/out is a prominently advertised feature of ManageHub. The frontend must prompt for fingerprint or face ID using the browser's Web Authentication API (WebAuthn).

Context

• Current check-in page: frontend/app/check-in/page.tsx
• useCheckIn hook: frontend/lib/react-query/hooks/workspace-tracking/useCheckIn.ts
• Browser WebAuthn API: navigator.credentials.get({ publicKey: ... })
• Depends on BE-05 (biometric backend endpoint) being implemented first

Tasks

• Add a Use Biometric Check-In button to the check-in page
• On click, call navigator.credentials.get({ publicKey: challengeFromServer }) to trigger the device biometric prompt (fingerprint / Face ID)
• Send the WebAuthn assertion response to POST /workspace-tracking/biometric/check-in
• Show a success confirmation with the check-in timestamp on completion
• If WebAuthn is not available on the device (!window.PublicKeyCredential), hide the biometric button and show a message explaining biometric is not supported on this device
• If the user has not yet enrolled a biometric credential, show an Enroll Biometric prompt that calls the registration endpoint

Files to Modify / Create

• frontend/app/check-in/page.tsx
• frontend/lib/react-query/hooks/workspace-tracking/useCheckIn.ts

[RemmyAcee]

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This issue aligns well with my experience. I can work on it and submit a polished PR for review.

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[chemicalcommando]

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Hello, I’m interested in working on this. I’ve spent several years building and maintaining scalable JS applications, so I’m comfortable handling edge cases, performance considerations, and proper test coverage. Happy to align with any project-specific guidelines before starting.

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[grantfox-oss]

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@chemicalcommando's PR #1242 was approved and merged by @yusuftomilola.

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