feat: add tenant student operations

supabase/migrations/202606290003_student_operations.sql

@@ -0,0 +1,92 @@
+create table if not exists public.tenant_student_notes (
+  id uuid primary key default gen_random_uuid(),
+  tenant_id uuid not null references public.tenants(id) on delete cascade,
+  student_user_id uuid not null references public.platform_users(id) on delete cascade,
+  note_type text not null default 'general'
+    check (note_type in ('general', 'learning', 'service', 'sales', 'risk', 'follow_up')),
+  content text not null,
+  visibility text not null default 'tenant_staff'
+    check (visibility in ('tenant_staff', 'class_staff', 'author_only')),
+  is_pinned boolean not null default false,
+  metadata jsonb not null default '{}'::jsonb,
+  created_by uuid references public.platform_users(id) on delete set null,
+  updated_by uuid references public.platform_users(id) on delete set null,
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now()
+);
+
+comment on table public.tenant_student_notes is
+  'Tenant-scoped student operation notes for teachers, class advisers, operators and sales follow-up.';
+
+create index if not exists idx_student_notes_tenant_student
+  on public.tenant_student_notes(tenant_id, student_user_id, is_pinned desc, created_at desc);
+
+create index if not exists idx_student_notes_tenant_creator
+  on public.tenant_student_notes(tenant_id, created_by, created_at desc)
+  where created_by is not null;
+
+create table if not exists public.tenant_student_followups (
+  id uuid primary key default gen_random_uuid(),
+  tenant_id uuid not null references public.tenants(id) on delete cascade,
+  student_user_id uuid not null references public.platform_users(id) on delete cascade,
+  assigned_to_user_id uuid references public.platform_users(id) on delete set null,
+  class_id uuid,
+  title text not null,
+  description text,
+  followup_type text not null default 'learning'
+    check (followup_type in ('learning', 'service', 'sales', 'renewal', 'risk', 'custom')),
+  priority text not null default 'normal'
+    check (priority in ('low', 'normal', 'high', 'urgent')),
+  status text not null default 'open'
+    check (status in ('open', 'in_progress', 'done', 'cancelled')),
+  due_at timestamptz,
+  completed_at timestamptz,
+  completed_by uuid references public.platform_users(id) on delete set null,
+  metadata jsonb not null default '{}'::jsonb,
+  created_by uuid references public.platform_users(id) on delete set null,
+  updated_by uuid references public.platform_users(id) on delete set null,
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now(),
+  foreign key (class_id) references public.tenant_classes(id) on delete set null
+);
+
+comment on table public.tenant_student_followups is
+  'Tenant-scoped student follow-up tasks for learning supervision, service, sales and renewal operations.';
+
+create index if not exists idx_student_followups_tenant_student
+  on public.tenant_student_followups(tenant_id, student_user_id, status, due_at nulls last, created_at desc);
+
+create index if not exists idx_student_followups_tenant_assignee
+  on public.tenant_student_followups(tenant_id, assigned_to_user_id, status, due_at nulls last)
+  where assigned_to_user_id is not null;
+
+create index if not exists idx_student_followups_tenant_class
+  on public.tenant_student_followups(tenant_id, class_id, status, due_at nulls last)
+  where class_id is not null;
+
+alter table public.tenant_student_notes enable row level security;
+alter table public.tenant_student_followups enable row level security;
+
+drop policy if exists tenant_isolation on public.tenant_student_notes;
+create policy tenant_isolation on public.tenant_student_notes
+  for all
+  using (tenant_id = app.current_tenant_id() or app.is_platform_admin())
+  with check (tenant_id = app.current_tenant_id() or app.is_platform_admin());
+
+drop policy if exists tenant_isolation on public.tenant_student_followups;
+create policy tenant_isolation on public.tenant_student_followups
+  for all
+  using (tenant_id = app.current_tenant_id() or app.is_platform_admin())
+  with check (tenant_id = app.current_tenant_id() or app.is_platform_admin());
+
+drop trigger if exists set_updated_at on public.tenant_student_notes;
+create trigger set_updated_at
+  before update on public.tenant_student_notes
+  for each row
+  execute function app.touch_updated_at();
+
+drop trigger if exists set_updated_at on public.tenant_student_followups;
+create trigger set_updated_at
+  before update on public.tenant_student_followups
+  for each row
+  execute function app.touch_updated_at();