feat(admin): full integration of order, product, and finance modules with real RPC data streams

docs/sql/10_schema/finance/ml_invoices_v1.sql

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+-- =====================================================================================
+-- Schema: 发票管理表
+-- 位置：docs/sql/10_schema/finance/ml_invoices_v1.sql
+-- 对象类型：Schema (DDL)
+-- 版本：v1
+-- 说明：记录用户提交的开票申请及其处理状态
+-- =====================================================================================
+
+CREATE TABLE IF NOT EXISTS public.ml_invoices (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  uid UUID NOT NULL REFERENCES public.ak_users(id),
+  order_no TEXT NOT NULL,           -- 关联订单号
+  
+  order_amount DECIMAL(12,2) NOT NULL, -- 订单金额
+  
+  invoice_type SMALLINT NOT NULL DEFAULT 1, -- 1: 电子普通发票, 2: 增值税专用发票
+  header_type SMALLINT NOT NULL DEFAULT 1,  -- 1: 个人, 2: 企业
+  
+  header_name TEXT NOT NULL,        -- 发票抬头
+  tax_id TEXT NULL,                 -- 企业税号
+  
+  email TEXT NULL,                  -- 接收邮箱
+  remark TEXT NULL,                 -- 备注
+  
+  status SMALLINT NOT NULL DEFAULT 0, -- 0: 待开票, 1: 已开票, -1: 已拒绝
+  refusal_reason TEXT NULL,           -- 驳回原因
+  invoice_url TEXT NULL,              -- 电子发票文件路径/URL
+  
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+-- 索引
+CREATE INDEX IF NOT EXISTS ml_invoices_uid_idx ON public.ml_invoices (uid);
+CREATE INDEX IF NOT EXISTS ml_invoices_order_no_idx ON public.ml_invoices (order_no);
+CREATE INDEX IF NOT EXISTS ml_invoices_status_idx ON public.ml_invoices (status);