Confirmed Supabase details

Let me read the Supabase reference files and all current components:

Now let me read all current components to fix mobile optimization:

Now let me also read the remaining components I haven't seen yet:

Now I have complete context. Let me execute all the changes: 1) Add Supabase packages, 2) Create Supabase client/server/middleware files, 3) Create the waitlist + contacts DB migration, 4) Wire the contact form to Supabase, 5) Mobile-optimize all components, 6) Reduce particle count on mobile for performance.