refactor(仪表板): 优化编辑界面复用功能键盘监听，防止关闭复用界面导致键盘监听事件失效

frontend/src/components/canvas/components/editor/Preview.vue

@@ -413,7 +413,8 @@ export default {
     }
   },
   created() {
-    if (this.canvasId === 'canvas-main') {
+    // 防止编辑界面销毁键盘事件监听
+    if (this.canvasId === 'canvas-main' && !this.showPosition.includes('multiplexing')) {
       listenGlobalKeyDownPreview()
     }
     // 取消视图请求

frontend/src/components/canvas/utils/shortcutKey.js

@@ -74,6 +74,8 @@ export function listenGlobalKeyDown() {
 export function listenGlobalKeyDownPreview() {
   window.onkeydown = (e) => {
     const { keyCode } = e
+    e.preventDefault()
+    e.stopPropagation()
     if (keyCode === ctrlKey || keyCode === commandKey) {
       isCtrlOrCommandDown = true
     } else if (isCtrlOrCommandDown) {