refactor: 微信支付命名从 Native 改为 PC扫码，统一术语

- WxpayNativeOrderParams → WxpayPcOrderParams
- createNativeOrder → createPcOrder
- 文档注释统一为「PC扫码 / H5」

.env.example

@@ -37,7 +37,7 @@ EASY_PAY_RETURN_URL="https://pay.example.com/pay/result"
 # ALIPAY_RETURN_URL=https://pay.example.com/pay/result
 
 # ── 微信支付直连（PAYMENT_PROVIDERS 含 wxpay 时必填） ────────────────────
-# 前端自动检测设备类型：PC 端使用 Native 扫码支付，移动端使用 H5 跳转微信 APP 支付
+# 前端自动检测设备类型：PC 端扫码支付，移动端 H5 跳转微信 APP 支付
 # 不在 PAYMENT_PROVIDERS 中配置 wxpay 则不启用微信支付
 # WXPAY_APP_ID=                # 公众号或移动应用 AppID
 # WXPAY_MCH_ID=                # 商户号（10位数字）

src/lib/wxpay/client.ts

@@ -1,6 +1,6 @@
 import WxPay from 'wechatpay-node-v3';
 import { getEnv } from '@/lib/config';
-import type { WxpayNativeOrderParams, WxpayH5OrderParams, WxpayRefundParams } from './types';
+import type { WxpayPcOrderParams, WxpayH5OrderParams, WxpayRefundParams } from './types';
 
 const BASE_URL = 'https://api.mch.weixin.qq.com';
 
@@ -76,7 +76,8 @@ async function request<T>(method: string, url: string, body?: Record<string, unk
   return data as T;
 }
 
-export async function createNativeOrder(params: WxpayNativeOrderParams): Promise<string> {
+/** PC 扫码支付（微信官方 API: /v3/pay/transactions/native） */
+export async function createPcOrder(params: WxpayPcOrderParams): Promise<string> {
   const env = assertWxpayEnv(getEnv());
   const result = await request<{ code_url: string }>('POST', '/v3/pay/transactions/native', {
     appid: env.WXPAY_APP_ID,

src/lib/wxpay/provider.ts

@@ -9,7 +9,7 @@ import type {
   RefundResponse,
 } from '@/lib/payment/types';
 import {
-  createNativeOrder,
+  createPcOrder,
   createH5Order,
   queryOrder,
   closeOrder,
@@ -49,7 +49,7 @@ export class WxpayProvider implements PaymentProvider {
       return { tradeNo: request.orderId, payUrl: h5Url };
     }
 
-    const codeUrl = await createNativeOrder({
+    const codeUrl = await createPcOrder({
       out_trade_no: request.orderId,
       description: request.subject,
       notify_url: notifyUrl,

src/lib/wxpay/types.ts

@@ -1,4 +1,4 @@
-export interface WxpayNativeOrderParams {
+export interface WxpayPcOrderParams {
   out_trade_no: string;
   description: string;
   notify_url: string;