fix: copy events compatible with old browsers

Author: liuxy0551

src/spreadSheet/style.scss

@@ -7,5 +7,15 @@
         th:first-child {
             border-left: 0;
         }
+        th:last-child {
+            border-right: 0;
+        }
+        td:last-child {
+            border-right: 0;
+        }
+        // 最后一行
+        tr:last-child th, tr:last-child td {
+            border-bottom: 0;
+        }
     }
 }

src/utils/copy.tsx

@@ -60,7 +60,10 @@ export default class CopyUtils {
         let succeeded;
 
         try {
-            succeeded = document.execCommand('copy');
+            // 浏览器兼容性处理，当前语法已废弃，延迟处理可以保证复制成功
+            setTimeout(() => {
+                succeeded = document.execCommand('copy');
+            });
         } catch (err) {
             succeeded = false;
         }