Add ACMCC app source, Supabase backend, and project config

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

supabase/migrations/20260515194521_fe263520-711a-47a9-9ef4-36044259cdeb.sql

@@ -0,0 +1,14 @@
+CREATE OR REPLACE FUNCTION public.get_maintenance_status()
+RETURNS jsonb
+LANGUAGE sql
+STABLE
+SECURITY DEFINER
+SET search_path = public
+AS $$
+  SELECT jsonb_build_object(
+    'enabled', COALESCE((SELECT lower(value) = 'true' FROM public.company_settings WHERE key = 'maintenance_mode'), false),
+    'message', COALESCE((SELECT value FROM public.company_settings WHERE key = 'maintenance_message'), 'The site is currently undergoing maintenance. Only administrators can sign in at this time.')
+  );
+$$;
+
+GRANT EXECUTE ON FUNCTION public.get_maintenance_status() TO anon, authenticated;