feat: 券详情页接入实时核销码（/voucher/checkCode，60秒滚动刷新）

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

pages/petrol/voucherDetail.vue

@@ -19,11 +19,11 @@
 		<block v-else-if="status === 2">
 			<view class="qrbox">
 				<view class="qr-badge">有效</view>
-				<!-- 石油返回图片URL时直接展示 -->
-				<image v-if="isQrImage" class="qr-img" :src="voucher.voucherCode" mode="widthFix" />
-				<!-- 返回码字符串时用 qrcodejs 渲染 -->
+				<!-- 核销码为图片URL时直接展示 -->
+				<image v-if="isQrImage" class="qr-img" :src="qrText" mode="widthFix" />
+				<!-- 核销码为字符串时前端渲染二维码（每60秒向服务端换取新码） -->
 				<view v-else id="petrol-qr" class="qr-canvas"></view>
-				<view class="qr-tip">到店出示此二维码，收银员以“中石油汽油券”通道扫码核销</view>
+				<view class="qr-tip">核销码每 60 秒自动刷新，请到店后出示给收银员扫码</view>
 			</view>
 
 			<view class="card">
@@ -93,8 +93,10 @@ export default {
 			phone: '',
 			voucher: {},
 			status: null, // null=加载中；含义对齐后端 statusCode
+			qrText: '', // xuchao: 实时核销码（60 秒滚动，来自 /voucher/checkCode）
 			pollTimer: null,
 			pollLeft: 3,
+			checkTimer: null,
 			voucherName: VOUCHER_NAME,
 			voucherRule: VOUCHER_RULE,
 			useRules: VOUCHER_USE_RULES,
@@ -107,7 +109,7 @@ export default {
 			return f ? (f / 100).toFixed(2) : ''
 		},
 		isQrImage() {
-			return typeof this.voucher.voucherCode === 'string' && /^https?:\/\//i.test(this.voucher.voucherCode)
+			return typeof this.qrText === 'string' && /^https?:\/\//i.test(this.qrText)
 		}
 	},
 	onLoad(options) {
@@ -121,6 +123,7 @@ export default {
 	},
 	onUnload() {
 		this.stopPoll()
+		this.stopCheckTimer()
 	},
 	methods: {
 		refresh(first) {
@@ -143,7 +146,11 @@ export default {
 				} else {
 					this.stopPoll()
 				}
-				if (this.status === 2) this.$nextTick(() => this.renderQr())
+				if (this.status === 2) {
+					this.loadCheckCode()
+				} else {
+					this.stopCheckTimer()
+				}
 			}).catch(() => {
 				if (first) uni.showToast({ title: '网络异常，请稍后重试', icon: 'none' })
 			})
@@ -159,18 +166,37 @@ export default {
 		stopPoll() {
 			if (this.pollTimer) { clearInterval(this.pollTimer); this.pollTimer = null }
 		},
-		// xuchao: 码字符串→二维码渲染；qrcode.min.js 为本地静态资源（static/js/），动态注入一次
+		// xuchao: 取实时核销码并渲染；CNPC 侧 60 秒滚动，前端每 55 秒预取刷新
+		loadCheckCode() {
+			const orderNo = this.voucher.orderNo || this.orderNo
+			if (!orderNo) return
+			this.$u.api.voucherCheckCode({ orderNo, phone: this.phone }).then(res => {
+				if (!bizOk(res)) { uni.showToast({ title: bizMsg(res) || '获取核销码失败', icon: 'none' }); return }
+				const d = bizData(res)
+				this.qrText = d.checkCode || ''
+				this.$nextTick(() => this.renderQr())
+				this.startCheckTimer()
+			}).catch(() => {})
+		},
+		startCheckTimer() {
+			this.stopCheckTimer()
+			this.checkTimer = setInterval(() => this.loadCheckCode(), 55000)
+		},
+		stopCheckTimer() {
+			if (this.checkTimer) { clearInterval(this.checkTimer); this.checkTimer = null }
+		},
+		// xuchao: 核销码字符串→二维码渲染；qrcode.min.js 为本地静态资源（static/js/），动态注入一次
 		renderQr() {
 			if (this.isQrImage) return
+			if (!this.qrText) return
 			const draw = () => {
 				if (typeof document === 'undefined' || typeof window.QRCode === 'undefined') return
 				const el = document.getElementById('petrol-qr')
-				if (!el || el.hasChildNodes()) {
-					if (el && this.voucher.voucherCode) { el.innerHTML = ''; } else { return }
-				}
+				if (!el) return
+				el.innerHTML = ''
 				// eslint-disable-next-line no-new
 				new window.QRCode(el, {
-					text: this.voucher.voucherCode,
+					text: this.qrText,
 					width: 200, height: 200, colorDark: '#1a1818', colorLight: '#ffffff',
 					correctLevel: window.QRCode.CorrectLevel.H
 				})