fix(c5): document 页「查看」按钮加导出权限门控

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/ltc/document/index.vue

@@ -15,7 +15,7 @@
         :actions-width="100"
       >
         <template #actions="{ row }">
-          <el-button link type="primary" @click="openDetail(row)">查看</el-button>
+          <el-button v-permission="'export:export'" link type="primary" @click="openDetail(row)">查看</el-button>
         </template>
       </ty-table>
     </el-card>