演示用

src/views/home/index.vue

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+<template>
+    <div class="home">
+        <van-nav-bar title="ByteSailing">
+            <template #right> <van-icon name="more-o" /> </template>
+        </van-nav-bar>
+    </div>
+</template>

src/views/message/index.vue

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+<template>
+    <div class="home">
+        <van-nav-bar title="ByteSailing">
+            <template #right> <van-icon name="more-o" /> </template>
+        </van-nav-bar>
+    </div>
+</template>

src/views/process/index.vue

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+<template>
+    <div class="process">
+        <van-nav-bar
+            title="采购单"
+            left-text=""
+            left-arrow
+            @click-left="onClickLeft"
+        >
+
+        </van-nav-bar>
+    </div>
+</template>
+<script setup>
+import { ref, getCurrentInstance, onMounted } from 'vue'
+const proxy = getCurrentInstance().proxy
+const onClickLeft = () => proxy.$router.push('/main/working')
+</script>