feat: 完成分类、worksheet 接口开发，资源迁移到七牛

apps/server/prisma/sql/002-create-tables.sql

@@ -94,6 +94,7 @@ ALTER TABLE public.users
     REFERENCES public.assets (id) ON UPDATE RESTRICT ON DELETE RESTRICT;
 
 CREATE TABLE public.categories (
+    status varchar(16) NOT NULL DEFAULT 'draft',
     id varchar(128) COLLATE "C" PRIMARY KEY,
     name varchar(100) NOT NULL,
     icon varchar(1024) NOT NULL,
@@ -107,9 +108,13 @@ CREATE TABLE public.categories (
         REFERENCES public.categories (id) ON UPDATE RESTRICT ON DELETE RESTRICT,
     CONSTRAINT categories_icon_asset_id_fkey FOREIGN KEY (icon_asset_id)
         REFERENCES public.assets (id) ON UPDATE RESTRICT ON DELETE RESTRICT,
+    CONSTRAINT categories_status_check CHECK (status IN ('draft', 'active', 'hidden')),
     CONSTRAINT categories_parent_not_self_check CHECK (parent_id IS NULL OR parent_id <> id)
 );
 
+CREATE INDEX categories_status_parent_sort_idx ON public.categories (status, parent_id, sort_order, id);
+COMMENT ON COLUMN public.categories.status IS '发布状态：draft 开发测试，active 上线，hidden 下架；公开访问还需所有上级分类 active';
+
 CREATE INDEX categories_parent_sort_idx ON public.categories (parent_id, sort_order, id);
 
 CREATE TABLE public.worksheets (