feat: add initial database schema, indexes, and RLS policies

supabase/migrations/20260808000001_initial_schema.sql

@@ -0,0 +1,128 @@
+-- Products, services, availability schedule, bookings, inquiries, and the
+-- public booked_slots mirror. See docs/superpowers/specs/2026-08-08-phase2-backend-foundation-supabase-design.md.
+
+create table public.products (
+  id text primary key,
+  name text not null,
+  category text not null check (category in ('hair-care', 'extensions', 'tools', 'accessories')),
+  price numeric not null,
+  image text not null,
+  description text not null,
+  in_stock boolean not null default true
+);
+
+create table public.services (
+  id text primary key,
+  name text not null,
+  duration_minutes integer not null,
+  price_from numeric not null,
+  description text not null,
+  image text not null
+);
+
+create table public.schedule_template (
+  id text primary key default 'default',
+  working_days integer[] not null,
+  start_time time not null,
+  end_time time not null,
+  slot_minutes integer not null
+);
+
+create table public.schedule_exceptions (
+  date date primary key,
+  closed boolean not null,
+  note text
+);
+
+create table public.bookings (
+  id uuid primary key default gen_random_uuid(),
+  service_id text not null references public.services(id),
+  date date not null,
+  time text not null,
+  contact_name text not null,
+  contact_phone text not null,
+  contact_email text not null,
+  contact_notes text not null default '',
+  status text not null default 'confirmed' check (status in ('confirmed', 'cancelled')),
+  created_at timestamptz not null default now()
+);
+
+create index bookings_service_id_idx on public.bookings (service_id);
+
+create table public.booked_slots (
+  date date not null,
+  time text not null,
+  primary key (date, time)
+);
+
+create table public.inquiries (
+  id uuid primary key default gen_random_uuid(),
+  product_id text not null references public.products(id),
+  contact_name text not null,
+  contact_email text not null,
+  contact_notes text not null default '',
+  status text not null default 'new' check (status in ('new', 'read')),
+  created_at timestamptz not null default now()
+);
+
+create index inquiries_product_id_idx on public.inquiries (product_id);
+
+-- Row Level Security
+
+alter table public.products enable row level security;
+alter table public.services enable row level security;
+alter table public.schedule_template enable row level security;
+alter table public.schedule_exceptions enable row level security;
+alter table public.bookings enable row level security;
+alter table public.booked_slots enable row level security;
+alter table public.inquiries enable row level security;
+
+-- products: public read, admin write
+create policy "products_public_read" on public.products
+  for select using (true);
+create policy "products_admin_write" on public.products
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);
+
+-- services: public read, admin write
+create policy "services_public_read" on public.services
+  for select using (true);
+create policy "services_admin_write" on public.services
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);
+
+-- schedule_template: public read, admin write
+create policy "schedule_template_public_read" on public.schedule_template
+  for select using (true);
+create policy "schedule_template_admin_write" on public.schedule_template
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);
+
+-- schedule_exceptions: public read, admin write
+create policy "schedule_exceptions_public_read" on public.schedule_exceptions
+  for select using (true);
+create policy "schedule_exceptions_admin_write" on public.schedule_exceptions
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);
+
+-- bookings: anyone can insert (submit a booking); only admin can read/update/delete
+create policy "bookings_public_insert" on public.bookings
+  for insert with check (true);
+create policy "bookings_admin_all" on public.bookings
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);
+
+-- booked_slots: public read; only admin policy exists for writes (in practice only
+-- the security-definer trigger in the next migration ever writes here)
+create policy "booked_slots_public_read" on public.booked_slots
+  for select using (true);
+create policy "booked_slots_admin_write" on public.booked_slots
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);
+
+-- inquiries: anyone can insert; only admin can read/update/delete
+create policy "inquiries_public_insert" on public.inquiries
+  for insert with check (true);
+create policy "inquiries_admin_all" on public.inquiries
+  for all using ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid)
+  with check ((select auth.uid()) = '00000000-0000-0000-0000-000000000001'::uuid);