feat(admin): implement user level, group and label modules with database, rpc and ui

docs/sql/10_schema/user/ak_user_groups_v1.sql

@@ -0,0 +1,30 @@
+-- =====================================================================================
+-- Schema: 用户分组表
+-- 位置：docs/sql/10_schema/user/ak_user_groups_v1.sql
+-- 对象类型：Schema (DDL)
+-- 版本：v1
+-- 说明：用户分组定义，支持逻辑删除和状态管理
+-- =====================================================================================
+
+CREATE TABLE IF NOT EXISTS public.ak_user_groups (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  
+  name TEXT NOT NULL,
+  remark TEXT NULL,
+  status INT NOT NULL DEFAULT 1, -- 1:启用, 0:禁用
+  
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  deleted_at TIMESTAMPTZ NULL,
+  
+  CONSTRAINT ak_user_groups_name_length CHECK (char_length(name) >= 1)
+);
+
+-- 唯一性约束（仅对未删除记录生效）
+CREATE UNIQUE INDEX IF NOT EXISTS ak_user_groups_name_uniq_active 
+  ON public.ak_user_groups (name) 
+  WHERE deleted_at IS NULL;
+
+-- 常用查询索引
+CREATE INDEX IF NOT EXISTS ak_user_groups_status_idx ON public.ak_user_groups (status) WHERE deleted_at IS NULL;
+CREATE INDEX IF NOT EXISTS ak_user_groups_created_at_idx ON public.ak_user_groups (created_at DESC);