sql数据流，amdin业务逻辑接入

docs/sql/10_schema/product/ak_shipping_templates_v1.sql

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+-- =====================================================================================
+-- Schema: 运费模板表
+-- 位置：docs/sql/10_schema/product/ak_shipping_templates_v1.sql
+-- 说明：管理商家的运费计算规则，按商家隔离。
+-- =====================================================================================
+
+CREATE TABLE IF NOT EXISTS public.ak_shipping_templates (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    merchant_id UUID NOT NULL REFERENCES public.ak_users(id) ON DELETE CASCADE,
+    
+    name TEXT NOT NULL,                          -- 模板名称
+    calc_method TEXT DEFAULT 'piece',            -- 计费方式: piece(件数), weight(重量), volume(体积)
+    is_free_shipping BOOLEAN DEFAULT false,      -- 是否包邮
+    
+    sort_order INTEGER DEFAULT 0,
+    created_at TIMESTAMPTZ DEFAULT now(),
+    updated_at TIMESTAMPTZ DEFAULT now()
+);
+
+-- 启用 RLS
+ALTER TABLE public.ak_shipping_templates ENABLE ROW LEVEL SECURITY;
+
+-- 权限策略：商家管理自己的模板
+CREATE POLICY "Merchants manage own shipping templates" 
+ON public.ak_shipping_templates FOR ALL 
+TO authenticated
+USING (merchant_id = auth.uid())
+WITH CHECK (merchant_id = auth.uid());
+
+-- 允许查看
+CREATE POLICY "Authenticated users view shipping templates" 
+ON public.ak_shipping_templates FOR SELECT 
+TO authenticated
+USING (true);
+
+-- 索引
+CREATE INDEX IF NOT EXISTS idx_shipping_templates_merchant ON public.ak_shipping_templates(merchant_id);

docs/sql/10_schema/product/ml_products_ext_v1.sql

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+-- =====================================================================================
+-- Schema Update: ml_products 扩展字段 (物流、营销、高级设置)
+-- 位置：docs/sql/10_schema/product/ml_products_ext_v1.sql
+-- 说明：补齐商品编辑页 Step 3-6 所需的持久化字段。
+-- =====================================================================================
+
+DO $$ 
+BEGIN
+    -- 1. 物流设置：关联运费模板
+    IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = 'ml_products' AND column_name = 'shipping_template_id') THEN
+        ALTER TABLE public.ml_products ADD COLUMN shipping_template_id UUID REFERENCES public.ak_shipping_templates(id) ON DELETE SET NULL;
+        COMMENT ON COLUMN public.ml_products.shipping_template_id IS '关联运费模板ID';
+    END IF;
+
+    -- 2. 营销设置：赠送积分
+    IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = 'ml_products' AND column_name = 'give_integral') THEN
+        ALTER TABLE public.ml_products ADD COLUMN give_integral INTEGER DEFAULT 0;
+        COMMENT ON COLUMN public.ml_products.give_integral IS '购买赠送积分';
+    END IF;
+
+    -- 3. 高级设置：警戒库存
+    IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = 'ml_products' AND column_name = 'stock_warning') THEN
+        ALTER TABLE public.ml_products ADD COLUMN stock_warning INTEGER DEFAULT 10;
+        COMMENT ON COLUMN public.ml_products.stock_warning IS '库存报警数值';
+    END IF;
+
+    -- 4. 高级设置：虚拟销量
+    IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = 'ml_products' AND column_name = 'virtual_sales') THEN
+        ALTER TABLE public.ml_products ADD COLUMN virtual_sales INTEGER DEFAULT 0;
+        COMMENT ON COLUMN public.ml_products.virtual_sales IS '虚拟销量（展示用）';
+    END IF;
+
+    -- 5. 高级设置：排序
+    IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = 'ml_products' AND column_name = 'sort_order') THEN
+        ALTER TABLE public.ml_products ADD COLUMN sort_order INTEGER DEFAULT 0;
+        COMMENT ON COLUMN public.ml_products.sort_order IS '商品排序权重';
+    END IF;
+
+END $$;