refactor(manager/plans): 删操作列下载按钮 (跟设计文件列下载重复)

- 表格操作列 width 240 → 200
- 删 el-button onDownload (操作列里)
- downloadFile() 函数保留 (设计文件列仍用)

ry-vue3/src/views/manager/Plans.vue

@@ -67,12 +67,11 @@
       </el-table-column>
       <el-table-column prop="projectNo" label="项目编号" width="140" align="center" />
       <el-table-column prop="remark" label="备注" min-width="160" show-overflow-tooltip />
-      <el-table-column label="操作" width="240" fixed="right">
+      <el-table-column label="操作" width="200" fixed="right">
         <template #default="{ row }">
           <el-button link type="primary" @click="onAudit(row)">审核</el-button>
           <el-button link type="primary" @click="onEdit(row)">修改</el-button>
           <el-button link type="primary" @click="onSettle(row)" v-if="row.isSettled!=='Y'">结算</el-button>
-          <el-button link type="primary" v-if="row.designFileUrl" @click="downloadFile(row)">下载</el-button>
         </template>
       </el-table-column>
     </el-table>