fix(miniprogram): adapt bx topbar for WeChat capsule safe area

Co-authored-by: Cursor <cursoragent@cursor.com>

miniprogram/components/bx-ui/bx-wf-config-page.vue

@@ -1,6 +1,6 @@
 <template>
   <view class="bx-page">
-    <view class="topbar">
+    <view class="topbar" :style="safeAreaStyle">
       <view class="topbar-left">
         <view class="topbar-back" @click="onBack">
           <text class="topbar-back-icon">‹</text>
@@ -160,7 +160,6 @@
         <view class="bx-sheet__title">选择审批人</view>
         <view class="search-wrap" style="padding: 8px 16px 0">
           <view class="search-box">
-            <text class="search-box__icon">⌕</text>
             <input
               v-model="approverKeyword"
               class="search-input"
@@ -197,6 +196,8 @@ import { ref, reactive, computed, onMounted } from 'vue'
 import { workflowApi, fetchPortalUserOptions } from '@/api/bx'
 import { statusLabel, adminStatusTagClass } from '@/utils/bxFormat'
 import { PAGE_PATHS } from '@/config/api'
+import { getSafeAreaStyle } from '@/utils/safeArea'
+const safeAreaStyle = getSafeAreaStyle()
 
 const props = defineProps({
   bizType: { type: String, required: true },
@@ -452,7 +453,7 @@ async function moveDown(node) {
 }
 
 function onBack() {
-  uni.navigateBack({ fail: () => uni.switchTab({ url: PAGE_PATHS.workbench }) })
+  uni.navigateBack({ fail: () => uni.reLaunch({ url: PAGE_PATHS.workbench }) })
 }
 
 onMounted(() => {