React + Supabase Web Application – Fix, Testing & Production Support

The application is already live on Vite/React with Supabase handling Auth, Database, Storage (with RLS), and the repo managed on GitHub. What I need now is a solid clean-up and hardening phase, not a redesign... (Budget: $1500 - $3000 AUD, Jobs: Continuous Integration, Database Management, GitHub, Software Development, Software Engineering, Software Testing, Supabase, Vite, Web Application, Web Development)