feat(packages/external): 重写远程网页，新增全屏按钮

 <template>
-  <div :style="getStyle(borderRadius)">
+  <div class="iframe-content" :style="getStyle(borderRadius)">
     <div v-show="isShowSvg" @click="handleFullScreen" class="fullscreen-button">
       <svg
         focusable="false"
@@ -19,7 +19,7 @@
     <iframe
       @mouseenter="handleMouseenter"
       @mouseleave="handleMouseleave"
-      id="iframe-content"
+      id="iframeContent"
       :src="option.dataset"
       :width="w"
       :height="h"
@@ -75,7 +75,7 @@ useChartDataFetch(props.chartConfig, useChartEditStore, (newData: string) => {
 })
 
 const handleFullScreen = () => {
-  const domName = document.getElementById('iframe-content') as HTMLElement
+  const domName = document.getElementById('iframeContent') as HTMLElement
   const htmlName = document.querySelector('html') as HTMLHtmlElement
   useFullScreen(domName, htmlName)
 }
@@ -85,10 +85,13 @@ const handleMouseleave = () => (isShowSvg.value = false)
 </script>
 
 <style lang="scss" scoped>
-.fullscreen-button {
-  cursor: pointer;
-  position: absolute;
-  right: 0;
-  top: 0;
+.iframe-content {
+  position: relative;
+  .fullscreen-button {
+    cursor: pointer;
+    position: absolute;
+    right: 0;
+    top: 0;
+  }
 }
 </style>