优化代码，并删除长按10秒退出的功能，因为浏览器不支持了

src/render/components/FlagView.vue

@@ -1,37 +1,19 @@
 <template>
-	<div v-show="!!src">
+  <div v-show="!!src">
-		<img @mouseup="onMouseUp" @mousedown="onMouseDown" :src="src">
+    <img :src="src">
-	</div>
+  </div>
 </template>
 
-<script lang="ts">
+<script lang="ts" setup>
-import { defineComponent, ref } from 'vue'
+import { ref } from 'vue'
-export default defineComponent({
-  setup: () => {
-    const src     	= ref('/image/flag/Beidou.png')
-    const show_flag = (flag_name) => {
-			if (!flag_name) return
 
-			src.value = './image/flag/' + flag_name + '.png'
+const src       = ref('')
-    }
+const show_flag = (flag_name: string) => {
+  if (!flag_name) return
 
-		let exit_timeout = null
+  src.value = './image/flag/' + flag_name + '.png'
-		const exit			 = () => {
+}
-      window.opener = window;
+defineExpose({ show_flag })
-      window.open('', '_self', '');
-      window.close();
-    }
-		const onMouseUp = () => {
-			if (exit_timeout) clearTimeout(exit_timeout)
-		}
-
-		const onMouseDown = () => {
-			exit_timeout = setTimeout(exit, 10000)
-		}
-
-    return { src, show_flag, onMouseUp, onMouseDown }
-  }
-})
 </script>
 
 <style scoped>