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

docs/sql/10_schema/user/ak_user_levels_v1.sql

@@ -0,0 +1,55 @@
+-- =====================================================================================
+-- Schema: 用户等级表
+-- 位置：docs/sql/10_schema/user/
+-- 对象类型：Schema (DDL)
+-- 版本：v1
+-- 说明：用户等级（经验值/折扣/展示/状态），支持逻辑删除
+-- =====================================================================================
+
+CREATE TABLE IF NOT EXISTS public.ak_user_levels (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+
+  name TEXT NOT NULL,
+  level_weight INT NOT NULL,
+  min_experience INT NOT NULL DEFAULT 0,
+  discount_percent INT NOT NULL DEFAULT 100,
+
+  is_visible BOOLEAN NOT NULL DEFAULT TRUE,
+  status INT NOT NULL DEFAULT 1,
+
+  icon_url TEXT NULL,
+  bg_image_url TEXT NULL,
+  bg_style_json JSONB NULL,
+
+  remark TEXT NULL,
+
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  deleted_at TIMESTAMPTZ NULL,
+
+  CONSTRAINT ak_user_levels_level_weight_nonnegative CHECK (level_weight >= 0),
+  CONSTRAINT ak_user_levels_min_experience_nonnegative CHECK (min_experience >= 0),
+  CONSTRAINT ak_user_levels_discount_percent_range CHECK (discount_percent BETWEEN 1 AND 100)
+);
+
+-- 唯一性（仅对未删除记录生效）
+CREATE UNIQUE INDEX IF NOT EXISTS ak_user_levels_name_uniq_active
+  ON public.ak_user_levels (name)
+  WHERE deleted_at IS NULL;
+
+CREATE UNIQUE INDEX IF NOT EXISTS ak_user_levels_level_weight_uniq_active
+  ON public.ak_user_levels (level_weight)
+  WHERE deleted_at IS NULL;
+
+-- 常用查询索引
+CREATE INDEX IF NOT EXISTS ak_user_levels_active_filter_idx
+  ON public.ak_user_levels (status, is_visible)
+  WHERE deleted_at IS NULL;
+
+CREATE INDEX IF NOT EXISTS ak_user_levels_min_experience_idx
+  ON public.ak_user_levels (min_experience)
+  WHERE deleted_at IS NULL;
+
+CREATE INDEX IF NOT EXISTS ak_user_levels_level_weight_desc_idx
+  ON public.ak_user_levels (level_weight DESC)
+  WHERE deleted_at IS NULL;