fix bug

src/components/modals/ExportModal.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted } from "vue";
 import { invoke } from "@tauri-apps/api/core";
-import { X, Calendar, ChevronLeft, ChevronRight, Copy } from "lucide-vue-next";
+import { X, Calendar, ChevronLeft, ChevronRight, Copy, ArrowDown, ArrowUp } from "lucide-vue-next";
 import { currentDate, showToast, getTagName, logicalMinutesToTime, toISODate, mainTags } from "../../store";
 import { DBEvent } from "../../types";
 
@@ -23,6 +23,8 @@ const selectedTags = ref<number[]>(mainTags.value.map(t => t.id));
 // 表格数据
 const dateList = ref<string[]>([]);
 const previewData = ref<Record<string, Record<number, string>>>({});
+const isDesc = ref(false);
+const sortedDateList = computed(() => isDesc.value ? [...dateList.value].reverse() : dateList.value);
 
 const toggleTag = (id: number) => {
   if (selectedTags.value.includes(id)) {
@@ -141,7 +143,7 @@ const copyToClipboard = async () => {
   const header = ["日期", ...selectedTags.value.map(id => getTagName(id))];
   let tsv = header.join("\t") + "\n";
   
-  for (const date of dateList.value) {
+  for (const date of sortedDateList.value) {
     let row = [date];
     for (const tagId of selectedTags.value) {
       let cellStr = previewData.value[date][tagId] || "";
@@ -243,7 +245,14 @@ const copyToClipboard = async () => {
         <!-- 表格预览区域 -->
         <div v-if="dateList.length > 0" class="flex-1 flex flex-col border-t border-border-main pt-6">
           <div class="flex justify-between items-center mb-4 flex-shrink-0">
+            <div class="flex items-center gap-4">
               <h3 class="text-sm font-bold text-text-sec flex items-center gap-2">数据预览</h3>
+              <button @click="isDesc = !isDesc" class="flex items-center gap-1.5 px-3 py-1.5 bg-bg-input hover:bg-border-main text-text-sec hover:text-text-main rounded-lg text-xs font-bold transition-all active:scale-95">
+                <ArrowDown v-if="!isDesc" :size="14" />
+                <ArrowUp v-else :size="14" />
+                {{ isDesc ? '倒序 (由近及远)' : '正序 (由远及近)' }}
+              </button>
+            </div>
             <button @click="copyToClipboard" class="flex items-center gap-1.5 px-4 py-2 bg-[#007AFF] hover:bg-[#007AFF]/90 text-white rounded-xl text-xs font-bold transition-all shadow-lg shadow-[#007AFF]/20 active:scale-95">
               <Copy :size="14" /> 一键复制完整表格
             </button>
@@ -260,7 +269,7 @@ const copyToClipboard = async () => {
                 </tr>
               </thead>
               <tbody class="bg-bg-card">
-                <tr v-for="date in dateList" :key="date" class="border-b border-border-main/30 hover:bg-bg-input/50 transition-colors">
+                <tr v-for="date in sortedDateList" :key="date" class="border-b border-border-main/30 hover:bg-bg-input/50 transition-colors">
                   <td class="p-4 font-bold whitespace-nowrap text-text-main align-top">
                     {{ date }}
                   </td>