Allow sending emails without custom domain by defaulting to Resend's
free onboarding address. Set RESEND_FROM_EMAIL env var later when
hooklab.fr domain is purchased and verified.
https://claude.ai/code/session_01H2aRGDaKgarPvhay2HxN6Y
- /admin page with secret-key authentication
- List all candidatures with details (expandable cards)
- Approve: updates status + generates Stripe checkout URL + sends email
- Reject: updates status
- Checkout URL displayed on screen for manual copy if Resend not configured
- Protected by ADMIN_SECRET env var
https://claude.ai/code/session_01H2aRGDaKgarPvhay2HxN6Y