feat: add tenant theme templates

supabase/migrations/202606290020_tenant_theme_templates.sql

@@ -0,0 +1,129 @@
+create table if not exists public.tenant_theme_templates (
+  id uuid primary key default gen_random_uuid(),
+  code text not null unique,
+  name text not null,
+  description text,
+  preview_image_url text,
+  theme jsonb not null default '{}'::jsonb,
+  public_assets jsonb not null default '{}'::jsonb,
+  status text not null default 'active' check (status in ('active', 'disabled')),
+  sort_order integer not null default 100,
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now()
+);
+
+create table if not exists public.tenant_theme_configs (
+  tenant_id uuid primary key references public.tenants(id) on delete cascade,
+  active_template_code text references public.tenant_theme_templates(code) on delete set null,
+  active_theme jsonb not null default '{}'::jsonb,
+  active_public_assets jsonb not null default '{}'::jsonb,
+  draft_template_code text references public.tenant_theme_templates(code) on delete set null,
+  draft_theme jsonb not null default '{}'::jsonb,
+  draft_public_assets jsonb not null default '{}'::jsonb,
+  status text not null default 'published' check (status in ('draft', 'published')),
+  published_at timestamptz,
+  published_by uuid references public.platform_users(id) on delete set null,
+  draft_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()
+);
+
+create index if not exists idx_theme_templates_status_sort
+  on public.tenant_theme_templates(status, sort_order, code);
+
+alter table public.tenant_theme_templates enable row level security;
+alter table public.tenant_theme_configs enable row level security;
+
+drop policy if exists theme_templates_public_read on public.tenant_theme_templates;
+create policy theme_templates_public_read on public.tenant_theme_templates
+  for select
+  using (status = 'active' or app.is_platform_admin());
+
+drop policy if exists tenant_isolation on public.tenant_theme_configs;
+create policy tenant_isolation on public.tenant_theme_configs
+  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_theme_templates;
+create trigger set_updated_at
+  before update on public.tenant_theme_templates
+  for each row
+  execute function app.touch_updated_at();
+
+drop trigger if exists set_updated_at on public.tenant_theme_configs;
+create trigger set_updated_at
+  before update on public.tenant_theme_configs
+  for each row
+  execute function app.touch_updated_at();
+
+insert into public.tenant_theme_templates (code, name, description, theme, public_assets, sort_order)
+values
+  (
+    'classic',
+    '经典蓝',
+    '稳重、清晰、适合默认题库和机构后台。',
+    '{
+      "mode":"light",
+      "primaryColor":"#2563eb",
+      "accentColor":"#0f766e",
+      "backgroundColor":"#f8fafc",
+      "surfaceColor":"#ffffff",
+      "textColor":"#0f172a",
+      "mutedColor":"#64748b",
+      "borderRadius":8,
+      "buttonRadius":8,
+      "fontFamily":"system",
+      "layoutDensity":"comfortable"
+    }'::jsonb,
+    '{"iconSet":"classic","shareCardStyle":"clean"}'::jsonb,
+    10
+  ),
+  (
+    'focus',
+    '专注绿',
+    '低干扰学习主题，适合学生端刷题和背单词场景。',
+    '{
+      "mode":"light",
+      "primaryColor":"#0f766e",
+      "accentColor":"#7c3aed",
+      "backgroundColor":"#f5fbf8",
+      "surfaceColor":"#ffffff",
+      "textColor":"#10201b",
+      "mutedColor":"#55706a",
+      "borderRadius":8,
+      "buttonRadius":8,
+      "fontFamily":"system",
+      "layoutDensity":"compact"
+    }'::jsonb,
+    '{"iconSet":"focus","shareCardStyle":"study"}'::jsonb,
+    20
+  ),
+  (
+    'high-contrast',
+    '高对比',
+    '强化标题、按钮和导航对比度，适合强运营入口和大屏后台。',
+    '{
+      "mode":"light",
+      "primaryColor":"#111827",
+      "accentColor":"#f59e0b",
+      "backgroundColor":"#f3f4f6",
+      "surfaceColor":"#ffffff",
+      "textColor":"#030712",
+      "mutedColor":"#4b5563",
+      "borderRadius":6,
+      "buttonRadius":6,
+      "fontFamily":"system",
+      "layoutDensity":"dense"
+    }'::jsonb,
+    '{"iconSet":"contrast","shareCardStyle":"bold"}'::jsonb,
+    30
+  )
+on conflict (code)
+do update set name = excluded.name,
+              description = excluded.description,
+              theme = excluded.theme,
+              public_assets = excluded.public_assets,
+              sort_order = excluded.sort_order,
+              status = 'active',
+              updated_at = now();