style(contract): 优化附件上传按钮样式及必填提示

- 为“上传附件”和“上传变更材料”按钮添加图标及主色调样式
- 在变更原因标题及输入框添加“必填”提示文字

style(customer-archive): 调整客户档案页面细节排版和格式
- 修复联系人列表相关代码缩进及注释格式
-

src/views/business/contract-manage-change.vue

@@ -79,10 +79,10 @@
       <section class="change-section attachment-section">
         <div class="section-head"><div class="dialog-section-title">其它附件</div><el-button type="primary" plain>批量下载</el-button></div>
         <el-table :data="attachments" border class="change-table"><el-table-column type="index" label="序号" width="70" /><el-table-column label="文件名" min-width="240"><template #default="{ row }"><el-link type="primary" @click="previewAttachment(row, attachments)">{{ row.originalName || row.name }}</el-link></template></el-table-column><el-table-column prop="description" label="附件描述" min-width="240" /><el-table-column prop="size" label="文件大小" width="120" /><el-table-column prop="userName" label="上传人" width="140" /><el-table-column prop="uploadTime" label="上传时间" width="180" /><el-table-column label="操作" width="100"><template #default="{ $index }"><el-link type="danger" @click="attachments.splice($index, 1)">删除</el-link></template></el-table-column></el-table>
-        <el-upload action="#" :auto-upload="false" multiple :show-file-list="false" @change="handleAttachment"><el-button plain>上传附件</el-button></el-upload>
+        <el-upload action="#" :auto-upload="false" multiple :show-file-list="false" @change="handleAttachment"><el-button type="primary" plain icon="el-icon-upload">上传附件</el-button></el-upload>
       </section>
 
-      <section class="change-section change-reason-section"><div class="dialog-section-title">变更原因</div><el-form-item prop="changeReason"><el-input v-model="form.changeReason" type="textarea" :rows="2" maxlength="2000" show-word-limit placeholder="请输入变更原因" /></el-form-item><div class="dialog-section-title">变更材料</div><el-upload action="#" :auto-upload="false" multiple :show-file-list="false" @change="handleChangeMaterial"><el-button plain>上传变更材料</el-button></el-upload></section>
+      <section class="change-section change-reason-section"><div class="dialog-section-title">变更原因（必填）</div><el-form-item prop="changeReason"><el-input v-model="form.changeReason" type="textarea" :rows="2" maxlength="2000" show-word-limit placeholder="请输入变更原因（必填）" /></el-form-item><div class="dialog-section-title">变更材料</div><el-upload action="#" :auto-upload="false" multiple :show-file-list="false" @change="handleChangeMaterial"><el-button type="primary" plain icon="el-icon-upload">上传变更材料</el-button></el-upload></section>
       <div class="page-footer">
         <el-button @click="$router.back()">取消</el-button>
         <el-button type="primary" @click="submit">提交</el-button>