fix(version_control): 修复版本控制页面表格列缺失问题

添加缺失的表格列闭合标签，确保下载、修改和删除按钮正确对齐

developer/version_control.php

@@ -403,6 +403,7 @@ if (!$verStmt) {
                                             <?php echo nl2br(htmlspecialchars($ver['changelog'] ?: '无')); ?>
                                         </div>
                                     </td>
+                                    <td>
                                         <a href="../download.php?id=<?php echo $ver['id']; ?>&type=version" class="btn btn-sm btn-outline-primary"><i class="fas fa-download me-1"></i>下载</a>
                                         <a href="#" class="btn btn-sm btn-outline-warning ms-2" onclick="openEditModal(<?php echo $ver['id']; ?>, '<?php echo htmlspecialchars($ver['version']); ?>', '<?php echo htmlspecialchars($ver['changelog']); ?>')"><i class="fas fa-edit me-1"></i>修改</a>
                                         <a href="#" class="btn btn-sm btn-outline-danger ms-2" onclick="confirmDelete(<?php echo $ver['id']; ?>)"><i class="fas fa-trash-alt me-1"></i>删除</a>