feat: 石油券前端价格与核销码改造——价格取服务端 latest.price 下发（测试期 0.01），详情页实时核销码 60 秒轮询

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pages/petrol/orderConfirm.vue

@@ -84,8 +84,24 @@ export default {
 			return
 		}
 		if (options.orderNo) this.orderNo = options.orderNo
+		this.initFromServer()
 	},
 	methods: {
+		// xuchao: 价格展示以服务端 latest 为准（测试期 0.01）；已有待支付单自动续用；已发券直接跳券详情
+		initFromServer() {
+			this.$u.api.voucherLatest({ phone: this.phone }).then(res => {
+				if (!bizOk(res)) return
+				const d = bizData(res)
+				if (d.price) this.priceText = (d.price / 100).toFixed(2)
+				if (!this.orderNo && d.statusCode === 0 && d.orderNo) {
+					this.orderNo = d.orderNo
+					if (d.amount) this.priceText = (d.amount / 100).toFixed(2)
+				}
+				if (d.statusCode === 2) {
+					uni.redirectTo({ url: '/pages/petrol/voucherDetail?orderNo=' + (d.orderNo || '') })
+				}
+			}).catch(() => {})
+		},
 		onConfirmPay() {
 			if (this.submitting) return
 			// xuchao: 容器拦截——非云闪付且非联调白名单号，弹窗不发起支付（决策 11/13）