feat: Enhance reservation functionality

supabase/migrations/20260422000000_reservation_slots_add_user_id.sql

@@ -0,0 +1,25 @@
+-- Expose user_id and member_name in reservation_slots.
+-- JOIN with members is safe here because security_invoker=false runs as view owner,
+-- bypassing RLS — so any authenticated user can see names without a separate members query.
+-- Must drop+recreate because CREATE OR REPLACE VIEW cannot insert a column mid-list.
+drop view if exists public.reservation_slots;
+
+create view public.reservation_slots
+  with (security_invoker = false)
+as
+  select
+    r.id,
+    r.boat_id,
+    r.user_id,
+    r.start_time,
+    r.end_time,
+    r.status,
+    coalesce(
+      nullif(trim(m.first_name || ' ' || m.last_name), ''),
+      m.email
+    ) as member_name
+  from public.reservations r
+  left join public.members m on m.user_id = r.user_id
+  where r.status <> 'cancelled';
+
+grant select on public.reservation_slots to authenticated;