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supabase/migrations/003_templates.sql

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+-- Item tier enum
+create type item_tier as enum ('fixed', 'variable', 'one_off');
+
+-- Templates table (one per user)
+create table templates (
+  id          uuid primary key default gen_random_uuid(),
+  user_id     uuid not null references auth.users(id) on delete cascade,
+  name        text not null default 'My Template',
+  created_at  timestamptz not null default now(),
+  updated_at  timestamptz not null default now(),
+  unique(user_id)
+);
+
+create index templates_user_id_idx on templates(user_id);
+
+alter table templates enable row level security;
+
+create policy "Users can CRUD own template"
+  on templates for all
+  using (user_id = auth.uid())
+  with check (user_id = auth.uid());
+
+-- Template items table
+create table template_items (
+  id              uuid primary key default gen_random_uuid(),
+  template_id     uuid not null references templates(id) on delete cascade,
+  category_id     uuid not null references categories(id) on delete restrict,
+  item_tier       item_tier not null check (item_tier in ('fixed', 'variable')),
+  budgeted_amount numeric(12,2) not null default 0,
+  sort_order      int not null default 0,
+  created_at      timestamptz not null default now(),
+  updated_at      timestamptz not null default now()
+);
+
+create index template_items_template_id_idx on template_items(template_id);
+
+alter table template_items enable row level security;
+
+create policy "Users can CRUD own template items"
+  on template_items for all
+  using (
+    template_id in (select id from templates where user_id = auth.uid())
+  )
+  with check (
+    template_id in (select id from templates where user_id = auth.uid())
+  );