feat: 添加二维码扫描页面，优化用户界面和扫描功能

src/components/qr-scanner/index.vue

@@ -93,7 +93,6 @@ function stop() {
   if (videoInst.value) {
     videoInst.value.srcObject = null;
   }
-  emit("close");
 }
 
 function handleSelectImage() {
@@ -182,7 +181,7 @@ defineExpose({
     >
 
     <div class="absolute left-0 top-0 z-10 p-4 pt-[calc(1rem+var(--ion-safe-area-top,0px))] pl-[calc(1rem+var(--ion-safe-area-left,0px))]">
-      <button class="z-1 flex items-center" @click="stop">
+      <button class="z-1 flex items-center" @click="emit('close')">
         <ion-icon :icon="chevronBackOutline" class="text-2xl text-white" />
       </button>
     </div>