refactor: 优化多个组件的返回逻辑

- 在 Requirement、Summary、Fund 组件中，将 history.back() 替换为 router.push()，以指定具体的路由名称- 在 ProjectApply 组件中，根据 step 值选择不同的路由页面
- 这些修改提高了组件的可测试性和灵活性，避免了依赖浏览器历史记录

src/components/DetailComponent/ProjectApply.vue

@@ -609,7 +609,19 @@ const getTitleName = (type) => {
   }
 }
 const handleBack = () => {
-  history.back()
+  if (props.step === '20') {
+     router.push({
+      name: 'Initiation'
+    })
+  } else if (props.step === '40') {
+     router.push({
+      name: 'Implementation'
+    })
+  }else if(props.step === '50'){
+    router.push({
+      name: 'Filing'
+    })
+  }
 }
 const compositeParam = (item) => {
   return {

src/views/project-demand/requirement/add.vue

@@ -578,7 +578,9 @@ const getDetailInfo = async () => {
 }
 
 const handleBack = () => {
-  history.back()
+  router.push({
+    name: 'Requirement'
+  })
 }
 const handleDelete = (row) => {
   // deleteFile(row.fileId).then(res => {

src/views/project-demand/summary/add.vue

@@ -586,7 +586,9 @@ const optionalChargeLeaderPickerOkOrCancel = (userList) => {
 }
 
 const handleBack = () => {
-  history.back()
+  router.push({
+    name: 'Summary'
+  })
 }
 const disabledDate = (time) => {
   return time.getTime() < new Date(formData.value.startTime).getTime();

src/views/special-fund/add.vue

@@ -234,7 +234,9 @@ const getFile = (val) => {
   })
 }
 const handleBack = () => {
-  history.back()
+  router.push({
+    name: 'Fund'
+  })
 }
 
 const submitParam = (item) => {