feat: 完善报销单审批流程及退回原因追踪

新增直属领导审批通过接口和审批待办列表查询，报销单退回
支持原因码分类和审批环节标记，优化票据附件去重和路径
回退查找，前端新增退回原因对话框、审批收件箱和工作台
图标组件，补充工具函数和单元测试覆盖。

web/src/composables/useAppShell.js

@@ -1,12 +1,14 @@
 import { computed, ref, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 
+import { useApprovalInbox } from './useApprovalInbox.js'
 import { useNavigation, navItems } from './useNavigation.js'
 import { useRequests } from './useRequests.js'
 import { useSystemState } from './useSystemState.js'
 import { useToast } from './useToast.js'
 import { fetchLatestConversation } from '../services/orchestrator.js'
 import { normalizeRequestForUi } from '../utils/requestViewModel.js'
+import { buildWorkbenchSummary } from '../utils/workbenchSummary.js'
 
 const SESSION_TYPE_EXPENSE = 'expense'
 
@@ -107,6 +109,7 @@ export function useAppShell() {
   } = useRequests()
   const { currentUser } = useSystemState()
   const { toast } = useToast()
+  const { refreshApprovalInbox } = useApprovalInbox()
 
   const customRange = ref({ start: '2024-07-06', end: '2024-07-12' })
 
@@ -128,6 +131,7 @@ export function useAppShell() {
   const detailAlerts = computed(() => (detailMode.value ? buildDetailAlerts(selectedRequest.value) : []))
 
   const requestsListActive = computed(() => activeView.value === 'requests' && !detailMode.value)
+  const workbenchActive = computed(() => activeView.value === 'workbench')
 
   watch(requestsListActive, (isActive, wasActive) => {
     if (isActive && !wasActive) {
@@ -135,6 +139,16 @@ export function useAppShell() {
     }
   })
 
+  watch(workbenchActive, (isActive, wasActive) => {
+    if (isActive && !wasActive) {
+      void reloadRequests()
+    }
+  })
+
+  const workbenchSummary = computed(() =>
+    buildWorkbenchSummary(requests.value, currentUser.value)
+  )
+
   const topBarView = computed(() => {
     if (detailMode.value) {
       return {
@@ -250,8 +264,9 @@ export function useAppShell() {
     const approvalStage = String(payload.approvalStage || payload.approval_stage || '').trim()
     smartEntryOpen.value = false
     await reloadRequests()
+    void refreshApprovalInbox()
     if (status === 'submitted') {
-      toast(`${claimNo || '该'}单据已完成 AI预审${approvalStage ? `，当前节点：${approvalStage}` : '，并已提交审批'}。`)
+      toast(`${claimNo || '该'}单据已完成 AI预审${approvalStage ? `，当前节点：${approvalStage}` : '，并已提交审批'}。`)
     } else {
       toast(`${claimNo || '该'}单据已保存到草稿，请到报销页面查看。`)
     }
@@ -271,10 +286,12 @@ export function useAppShell() {
 
   async function handleRequestUpdated() {
     await reloadRequests()
+    void refreshApprovalInbox()
   }
 
   async function handleRequestDeleted() {
     await reloadRequests()
+    void refreshApprovalInbox()
     router.push({ name: 'app-requests' })
   }
 
@@ -301,6 +318,7 @@ export function useAppShell() {
     openTravelCreate,
     ranges,
     requestSummary,
+    workbenchSummary,
     requestsError,
     requestsLoading,
     reloadRequests,