Supabase Admin & Stripe Integration

I have already launched a job-board style website where employers publish vacancies. The backend runs entirely on Supabase, and now I need to round out the project with three key pieces of work:

• Build a production-ready Admin page served via Supabase Edge Functions. Inside this dashboard I must be able to handle Διαχείριση χρηστών (user management) and Διαχείριση αγγελιών (ad management). A clean UI is welcome, but the priority is fast, secure CRUD actions wired to the existing tables.

• Integrate payments through both Stripe API and the Greek IRIS API so employers can pay for posting credits or featured listings. I want Webhook handling, error-tolerant retries, and clear payment status logs visible inside the new Admin page.

• Perform a code and database health-check: review the current Supabase tables, row-level security policies and any server-side logic to be certain they align with best practices before we move to full production.

Please keep all work inside the existing Supabase project; no extra backend frameworks are required. Deliver tested code, concise setup notes, and short written feedback on any structural issues you spot during the review.