feat(移动端): 优化支出管理功能

1. 新增支出 (Add.vue):
   - 增加图片附件上传功能（限制为图片类型）
   - 支持最多上传 9 张图片
   - 实现图片预览和删除功能
   - 将图片转 base64 格式提交到后端 attachments 字段

2. 支出列表 (List.vue):
   - 重构卡片布局为 5 行展示：
     * 第一行：标题 + 支出时间（右侧对齐）
     * 第二行：支出类型（左）+ 支出金额（右，红色突出显示）
     * 第三行：收款单位
     * 第四行：支付描述（可选，有内容时显示）
     * 第五行：查看附件按钮（有附件时显示，蓝色可点击）
   - 添加 formatDateTime 函数格式化日期时间
   - 添加 getAttachmentCount 函数计算附件数量
   - 添加 previewAttachments 函数实现图片预览
   - 优化样式：分隔线、图标、标签等细节美化

技术实现:
- 使用 Vant 的 van-uploader 组件上传图片
- 使用 ImagePreview 组件预览图片
- 附件以 base64 逗号分隔字符串形式存储
- 响应式布局适配移动端

fund-mobile/components.d.ts

@@ -24,5 +24,6 @@ declare module 'vue' {
     VanPullRefresh: typeof import('vant/es')['PullRefresh']
     VanSearch: typeof import('vant/es')['Search']
     VanTag: typeof import('vant/es')['Tag']
+    VanUploader: typeof import('vant/es')['Uploader']
   }
 }

fund-mobile/src/views/expense/Add.vue

@@ -51,6 +51,18 @@
         <label>支出描述</label>
         <textarea v-model="form.description" placeholder="输入描述" rows="3" class="mac-textarea"></textarea>
       </div>
+      
+      <div class="form-group">
+        <label>附件上传（图片）</label>
+        <van-uploader
+          v-model="fileList"
+          :accept="'image/*'"
+          :max-count="9"
+          :after-read="onAfterRead"
+          :before-delete="onBeforeDelete"
+          multiple
+        />
+      </div>
     </div>
 
     <div class="submit-btn">
@@ -74,13 +86,15 @@
 <script setup lang="ts">
 import { ref, reactive, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
-import { showToast, showSuccessToast, showFailToast } from 'vant'
+import { showToast, showSuccessToast, showFailToast, ImagePreview } from 'vant'
 import { createExpense, getExpenseTypeTree } from '@/api'
 
 const router = useRouter()
 const loading = ref(false)
 const showTypePicker = ref(false)
 const showDatePicker = ref(false)
+const fileList = ref<any[]>([])
+const uploadedAttachments = ref<string[]>([])
 
 const form = reactive({
   title: '',
@@ -106,6 +120,39 @@ const onDateConfirm = ({ selectedValues }: any) => {
   showDatePicker.value = false
 }
 
+// 附件上传处理
+const onAfterRead = async (file: any) => {
+  // 这里模拟上传，实际应该调用文件上传 API
+  // 由于项目使用 fund-file 服务，暂时先保存为 base64
+  if (file.file) {
+    const reader = new FileReader()
+    reader.onload = (e) => {
+      const base64 = e.target?.result as string
+      // 提取 base64 数据部分（去掉 data:image/jpeg;base64,前缀）
+      const base64Data = base64.split(',')[1]
+      if (base64Data) {
+        uploadedAttachments.value.push(base64Data)
+        console.log('已添加附件:', base64Data.substring(0, 50) + '...')
+      }
+    }
+    reader.readAsDataURL(file.file)
+  }
+}
+
+const onBeforeDelete = (file: any, detail: any) => {
+  // 从列表中移除
+  uploadedAttachments.value.splice(detail.index, 1)
+  return true
+}
+
+// 预览图片
+const onPreviewImage = (index: number) => {
+  ImagePreview.show({
+    images: uploadedAttachments.value.map(b64 => `data:image/jpeg;base64,${b64}`),
+    startPosition: index,
+  })
+}
+
 const handleSubmit = async () => {
   if (!form.title) {
     showFailToast('请输入支出标题')
@@ -128,13 +175,20 @@ const handleSubmit = async () => {
   try {
     // 转换日期格式为 LocalDateTime 格式
     const expenseDateTime = form.expenseDate ? `${form.expenseDate}T12:00:00` : null
+    
+    // 处理附件：将 base64 数组转为逗号分隔的字符串
+    const attachmentsStr = uploadedAttachments.value.length > 0 
+      ? uploadedAttachments.value.join(',') 
+      : null
+    
     const requestData = {
       title: form.title,
       expenseType: form.expenseTypeId,
       amount: parseFloat(form.amount),
       expenseDate: expenseDateTime,
       purpose: form.description,
-      payeeName: form.payeeName
+      payeeName: form.payeeName,
+      attachments: attachmentsStr
     }
     console.log('提交支出数据:', requestData)
     await createExpense(requestData)

fund-mobile/src/views/expense/List.vue

@@ -16,29 +16,42 @@
         @load="onLoad"
       >
         <div class="expense-card" v-for="item in list" :key="item.expenseId">
-          <div class="expense-header">
+          <!-- 第一行：标题 + 支出时间 -->
-            <span class="expense-title">{{ item.title }}</span>
+          <div class="card-row title-row">
-            <van-tag :type="getStatusType(item.status)">{{ getStatusText(item.status) }}</van-tag>
+            <span class="card-title">{{ item.title }}</span>
+            <span class="card-time">{{ formatDateTime(item.expenseDate) }}</span>
           </div>
-          <div class="expense-info">
+          
-            <div class="info-item">
+          <!-- 第二行：支出类型 + 支出金额 -->
-              <van-icon name="apps-o" />
+          <div class="card-row info-row">
+            <div class="info-left">
+              <van-icon name="apps-o" class="row-icon" />
+              <span class="info-label">支出类型：</span>
               <span>{{ item.typeName || '-' }}</span>
             </div>
-            <div class="info-item">
+            <span class="card-amount">¥{{ item.amount?.toLocaleString() }}</span>
-              <van-icon name="clock-o" />
-              <span>{{ item.expenseDate }}</span>
           </div>
+          
+          <!-- 第三行：收款单位 -->
+          <div class="card-row payee-row">
+            <van-icon name="shop-o" class="row-icon" />
+            <span class="info-label">收款单位：</span>
+            <span>{{ item.payeeName || '-' }}</span>
           </div>
-          <div class="expense-amount">
+          
-            <div class="amount-item">
+          <!-- 第四行：支付描述 -->
-              <span class="label">支出金额</span>
+          <div class="card-row desc-row" v-if="item.purpose">
-              <span class="value expense-value">¥{{ item.amount?.toLocaleString() }}</span>
+            <van-icon name="description-o" class="row-icon" />
-            </div>
+            <span class="info-label">支付描述：</span>
-            <div class="amount-item" v-if="item.paidAmount">
+            <span class="desc-text">{{ item.purpose }}</span>
-              <span class="label">已支付</span>
-              <span class="value">¥{{ item.paidAmount?.toLocaleString() }}</span>
           </div>
+          
+          <!-- 第五行：查看附件 -->
+          <div class="card-row attachment-row" v-if="item.attachments">
+            <van-icon name="photo-o" class="row-icon" />
+            <span class="attachment-btn" @click="previewAttachments(item)">
+              查看附件（{{ getAttachmentCount(item.attachments) }}）
+            </span>
           </div>
         </div>
       </van-list>
@@ -54,6 +67,7 @@
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
 import { getExpenseList } from '@/api'
+import { ImagePreview } from 'vant'
 
 const searchText = ref('')
 const loading = ref(false)
@@ -63,6 +77,43 @@ const list = ref<any[]>([])
 const pageNum = ref(1)
 const pageSize = 10
 
+// 格式化日期时间
+const formatDateTime = (dateTime: string) => {
+  if (!dateTime) return ''
+  try {
+    // 处理 LocalDateTime 格式：2024-01-15T10:30:00
+    const date = new Date(dateTime)
+    const year = date.getFullYear()
+    const month = String(date.getMonth() + 1).padStart(2, '0')
+    const day = String(date.getDate()).padStart(2, '0')
+    const hours = String(date.getHours()).padStart(2, '0')
+    const minutes = String(date.getMinutes()).padStart(2, '0')
+    return `${year}-${month}-${day} ${hours}:${minutes}`
+  } catch (e) {
+    return dateTime
+  }
+}
+
+// 获取附件数量（逗号分隔的字符串）
+const getAttachmentCount = (attachments: string) => {
+  if (!attachments) return 0
+  return attachments.split(',').filter(s => s.trim()).length
+}
+
+// 预览附件
+const previewAttachments = (item: any) => {
+  if (!item.attachments) return
+  
+  // 将 base64 字符串转为图片 URL
+  const attachmentList = item.attachments.split(',')
+  const imageUrls = attachmentList.map((b64: string) => `data:image/jpeg;base64,${b64}`)
+  
+  ImagePreview.show({
+    images: imageUrls,
+    startPosition: 0,
+  })
+}
+
 const getStatusType = (status: string): 'primary' | 'success' | 'warning' | 'danger' | 'default' => {
   const map: Record<string, 'primary' | 'success' | 'warning' | 'danger' | 'default'> = {
     'pending': 'warning',
@@ -152,59 +203,99 @@ onMounted(() => {
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
 }
 
-.expense-header {
+.card-row {
   display: flex;
-  justify-content: space-between;
   align-items: center;
-  margin-bottom: 12px;
+  margin-bottom: 10px;
 }
 
-.expense-title {
+.card-row:last-child {
+  margin-bottom: 0;
+}
+
+.title-row {
+  justify-content: space-between;
+  align-items: flex-start;
+  margin-bottom: 12px;
+  padding-bottom: 10px;
+  border-bottom: 1px solid #f0f0f0;
+}
+
+.card-title {
   font-size: 16px;
   font-weight: 600;
   color: #333;
+  flex: 1;
+  margin-right: 12px;
 }
 
-.expense-info {
+.card-time {
-  display: flex;
+  font-size: 12px;
-  gap: 16px;
+  color: #999;
-  margin-bottom: 12px;
+  white-space: nowrap;
 }
 
-.info-item {
+.info-row {
+  justify-content: space-between;
+  margin-bottom: 10px;
+}
+
+.info-left {
   display: flex;
   align-items: center;
-  gap: 4px;
+  flex: 1;
   font-size: 13px;
   color: #666;
 }
 
-.expense-amount {
+.row-icon {
-  display: flex;
+  font-size: 14px;
-  gap: 24px;
+  color: #999;
-  padding-top: 12px;
+  margin-right: 4px;
+}
+
+.info-label {
+  color: #999;
+  margin-right: 4px;
+}
+
+.card-amount {
+  font-size: 18px;
+  font-weight: 600;
+  color: #FF3B30;
+  white-space: nowrap;
+}
+
+.payee-row,
+.desc-row {
+  font-size: 13px;
+  color: #666;
+  margin-bottom: 8px;
+}
+
+.desc-text {
+  flex: 1;
+  line-height: 1.5;
+}
+
+.attachment-row {
+  padding-top: 10px;
+  margin-top: 10px;
   border-top: 1px solid #f0f0f0;
 }
 
-.amount-item {
+.attachment-btn {
-  display: flex;
+  color: #007AFF;
-  flex-direction: column;
+  font-size: 13px;
+  cursor: pointer;
+  padding: 4px 8px;
+  background: rgba(0, 122, 255, 0.08);
+  border-radius: 4px;
+  transition: all 0.2s ease;
 }
 
-.amount-item .label {
+.attachment-btn:active {
-  font-size: 12px;
+  background: rgba(0, 122, 255, 0.15);
-  color: #999;
-}
-
-.amount-item .value {
-  font-size: 15px;
-  font-weight: 600;
-  color: #333;
-  margin-top: 4px;
-}
-
-.expense-value {
-  color: #FF3B30 !important;
 }
 
 .add-btn {