fix: 修复审批列表首次加载不显示和发起人审批人问题

- 移除 loadingRef，解决 React 18 StrictMode 下请求阻塞问题
- 提交申请时根据选择的审批人动态创建/更新审批节点
- 修改申请提交后跳转到审批列表而非出差列表
- 更新 PROJECT_ISSUES.md 记录所有问题和解决方案

修复问题：
1. 首次进入审批列表"我发起的"不显示数据
2. 发起人也是审批人时"待我审批"不显示
3. 申请提交后跳转到错误的页面

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/approval/list.tsx

@@ -49,31 +49,19 @@ export default function ApprovalList() {
   const [activeTab, setActiveTab] = useState<'my' | 'pending' | 'approved'>('my')
   const [list, setList] = useState<ApprovalItem[]>([])
   const [loading, setLoading] = useState(false)
-  const [hasMore, setHasMore] = useState(false)  // 改为 false，避免挂载时立即触发加载更多
+  const [hasMore, setHasMore] = useState(false)
   const [page, setPage] = useState(1)
-  const currentTabRef = useRef(activeTab) // 用于追踪当前有效的 tab
-  const loadingRef = useRef(false) // 用于同步追踪 loading 状态
-  const requestIdRef = useRef<string | null>(null) // 用于追踪当前请求 ID
-  const mountedRef = useRef(true) // 组件挂载时立即设为 true
 
-  // 更新 ref 当 activeTab 变化时
-  useEffect(() => {
-    currentTabRef.current = activeTab
-  }, [activeTab])
+  const requestIdRef = useRef<string>('')
 
-  // 加载数据 - 接收 tab 参数避免使用旧的 activeTab
+  // 加载数据 - 接收 tab 参数
   const loadData = async (pageNum: number = 1, isRefresh: boolean = false, tab?: string) => {
-    // 使用 ref 检查 loading，避免 React 18 StrictMode 双重调用
-    if (loadingRef.current) {
-      console.log('⏸️ Request blocked - already loading')
-      return
-    }
-
-    // 使用传入的 tab 参数，如果没有则使用当前 activeTab
-    const currentTab = tab || activeTab
-    const requestId = `${currentTab}-${pageNum}-${Date.now()}`
+    // 生成新的请求 ID
+    const requestId = `${tab || activeTab}-${pageNum}-${Date.now()}-${Math.random()}`
     requestIdRef.current = requestId
 
+    const currentTab = tab || activeTab
+
     console.log('🔍 Loading approval list START:', {
       requestId,
       currentTab,
@@ -81,11 +69,11 @@ export default function ApprovalList() {
       tab,
       pageNum,
       isRefresh,
-      currentTabRef: currentTabRef.current
+      requestIdRefNow: requestIdRef.current
     })
 
-    loadingRef.current = true
     setLoading(true)
+
     try {
       const result = await approvalApi.getList({
         type: currentTab,
@@ -95,34 +83,30 @@ export default function ApprovalList() {
 
       console.log('📦 API response received:', {
         requestId,
-        type: currentTab,
-        count: result?.list?.length,
-        currentTabRefNow: currentTabRef.current
+        currentTab,
+        requestIdRefNow: requestIdRef.current,
+        count: result?.list?.length
       })
 
       // 检查是否是最新的请求
       if (requestIdRef.current !== requestId) {
-        console.log('⏭️ Skipping outdated response:', { requestId, latestRequestId: requestIdRef.current })
+        console.log('⏭️ Skipping outdated response:', {
+          requestId,
+          latestRequestId: requestIdRef.current
+        })
         return
       }
 
-      console.log('📦 API response validated - processing data')
-
       const newList = result?.list || []
 
-      // 只在当前 tab 与请求的 tab 一致时才更新数据
-      if (currentTabRef.current === currentTab) {
-        console.log('✅ Updating list for tab:', currentTab, 'items:', newList.length)
-        setList(newList)
-        setHasMore(newList.length >= 20)
-        setPage(pageNum)
-      } else {
-        console.log('⏭️ Skipping update - tab changed from', currentTab, 'to', currentTabRef.current)
-      }
+      // 直接更新数据
+      console.log('✅ Updating list for tab:', currentTab, 'items:', newList.length)
+      setList(newList)
+      setHasMore(newList.length >= 20)
+      setPage(pageNum)
     } catch (error: any) {
-      console.error('Failed to load approvals:', error)
+      console.error('❌ Failed to load approvals:', error)
     } finally {
-      loadingRef.current = false
       setLoading(false)
     }
   }
@@ -130,12 +114,11 @@ export default function ApprovalList() {
   // 切换标签
   const handleTabChange = (key: string) => {
     console.log('🔄 Tab changing from', activeTab, 'to', key)
-    currentTabRef.current = key as 'my' | 'pending' | 'approved' // 立即更新 ref
     setActiveTab(key as 'my' | 'pending' | 'approved')
     setList([])
-    setHasMore(true)
+    setHasMore(false)
     setPage(1)
-    // 直接传入新的 tab 值，避免使用旧的 activeTab
+    // 直接传入新的 tab 值
     loadData(1, true, key)
   }
 
@@ -151,15 +134,11 @@ export default function ApprovalList() {
 
   // 初始加载
   useEffect(() => {
-    mountedRef.current = true
-    // 强制使用页码 1，忽略当前 page 状态
-    console.log('🚀 Initial load effect, forcing page=1')
+    console.log('🚀 Initial load effect')
     loadData(1, true)
 
     return () => {
       console.log('🧹 Cleanup function called')
-      mountedRef.current = false
-      // 不清空 requestIdRef，让异步请求能够正常完成处理
     }
   }, [])
 

frontend/src/pages/business-trip/apply.tsx

@@ -270,7 +270,7 @@ export default function BusinessTripApply() {
       sessionStorage.removeItem('businessTripDraft')
 
       Toast.show('草稿已保存')
-      navigate('/business-trip')
+      navigate('/approval')
     } catch (error: any) {
       Toast.show(error.message || '保存失败')
     }
@@ -336,7 +336,7 @@ export default function BusinessTripApply() {
           sessionStorage.removeItem('businessTripDraft')
 
           Toast.show(t('businessTrip.submitSuccess'))
-          navigate('/business-trip')
+          navigate('/approval')
         } catch (error: any) {
           Toast.show(error.message || '提交失败')
         }