Fix Hostinger Horizon & Supabase Issues

My Hostinger Horizon site looks fine on the surface, yet the moment it tries to talk to Supabase the whole thing grinds to a halt. I’m seeing clear performance slow-downs during data retrieval and the automated workflows between user roles, and email integrations crash outright, so there’s likely a compatibility wrinkle buried somewhere in the current setup.

Here’s what I need from you:

• Audit the existing Horizon configuration, spot the bottlenecks, and stabilize anything that could be causing the slowdown or crashes.
• Re-implement Supabase from scratch (the previous attempt was removed) and wire it back into the finished front-end so all database calls, authentication flows, and email-triggering workflows run flawlessly.
• Prove the fix by running through a full cycle: user signup → data write/read → transactional email. No errors or noticeable lag should appear at any step.

You’ll have full access to the Hostinger dashboard, current codebase, and my Supabase project. I’m counting on close attention to detail, so please highlight exactly what you changed and why once the repair is complete.