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

docs/sql/10_schema/user/ak_user_labels_v1.sql

@@ -0,0 +1,33 @@
+-- =====================================================================================
+-- Schema: 用户标签表
+-- 位置：docs/sql/10_schema/user/ak_user_labels_v1.sql
+-- 对象类型：Schema (DDL)
+-- 版本：v1
+-- 说明：用户标签定义，支持逻辑删除与状态管理
+-- =====================================================================================
+
+CREATE TABLE IF NOT EXISTS public.ak_user_labels (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+
+  name TEXT NOT NULL,
+  color TEXT NULL,
+  remark TEXT NULL,
+  status INT NOT NULL DEFAULT 1,
+
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  deleted_at TIMESTAMPTZ NULL,
+
+  CONSTRAINT ak_user_labels_name_length CHECK (char_length(name) >= 1)
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS ak_user_labels_name_uniq_active
+  ON public.ak_user_labels (name)
+  WHERE deleted_at IS NULL;
+
+CREATE INDEX IF NOT EXISTS ak_user_labels_status_idx
+  ON public.ak_user_labels (status)
+  WHERE deleted_at IS NULL;
+
+CREATE INDEX IF NOT EXISTS ak_user_labels_created_at_idx
+  ON public.ak_user_labels (created_at DESC);