fix(加班申请): 修复加班申请中，和状态机相关的代码的不合理的地方。

src/views/personal-center/overtime-application/modules/overtime-application-action-dialog.vue

@@ -51,7 +51,15 @@ const reasonLabel = computed(() => {
   return map[props.actionType];
 });
 
-const reasonRequired = computed(() => props.actionType !== 'approve');
+const reasonRequired = computed(() => props.actionType === 'reject');
+
+const reasonPlaceholder = computed(() => {
+  if (reasonRequired.value) {
+    return `请输入${reasonLabel.value}`;
+  }
+
+  return props.actionType === 'cancel' ? '可填写撤销原因' : '可填写审核意见';
+});
 
 const rules = computed(() => ({
   reason: reasonRequired.value
@@ -105,7 +113,7 @@ watch(
           :rows="5"
           maxlength="1000"
           show-word-limit
-          :placeholder="reasonRequired ? `请输入${reasonLabel}` : '可填写审核意见'"
+          :placeholder="reasonPlaceholder"
         />
       </ElFormItem>
     </ElForm>