admin模块接入数据库

docs/sql/10_schema/distribution/ak_promoter_relations_v1.sql

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+-- 推广员关系表：记录下级与上级（邀请人）的绑定关系
+CREATE TABLE IF NOT EXISTS public.ak_promoter_relations (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  uid UUID NOT NULL REFERENCES public.ak_users(id) ON DELETE CASCADE,
+  inviter_uid UUID NOT NULL REFERENCES public.ak_users(id) ON DELETE CASCADE,
+  bind_time TIMESTAMPTZ DEFAULT now(),
+  created_at TIMESTAMPTZ DEFAULT now(),
+
+  CONSTRAINT chk_ak_promoter_relations_no_self CHECK (uid <> inviter_uid),
+  CONSTRAINT uq_ak_promoter_relations_uid UNIQUE (uid)
+);
+
+CREATE INDEX IF NOT EXISTS idx_ak_promoter_relations_inviter_uid ON public.ak_promoter_relations(inviter_uid);
+
+-- 启用 RLS
+ALTER TABLE public.ak_promoter_relations ENABLE ROW LEVEL SECURITY;
+
+-- Admin 可读写
+CREATE POLICY "Admins can manage promoter relations"
+ON public.ak_promoter_relations
+FOR ALL
+TO authenticated
+USING (
+  EXISTS (
+    SELECT 1 FROM public.ak_users
+    WHERE id = auth.uid() AND role = 'admin'
+  )
+)
+WITH CHECK (
+  EXISTS (
+    SELECT 1 FROM public.ak_users
+    WHERE id = auth.uid() AND role = 'admin'
+  )
+);
+
+-- 普通用户可查看与自己相关的关系（可选，便于移动端展示上级/下级）
+CREATE POLICY "Users can view their promoter relation"
+ON public.ak_promoter_relations
+FOR SELECT
+TO authenticated
+USING (uid = auth.uid() OR inviter_uid = auth.uid());