优化

app/src/main/java/io/legado/app/help/http/BackstageWebView.kt

@@ -35,8 +35,10 @@ class BackstageWebView(
 
     suspend fun getStrResponse(): StrResponse = suspendCancellableCoroutine { block ->
         block.invokeOnCancellation {
+            runOnUI {
                 destroy()
             }
+        }
         callback = object : BackstageWebView.Callback() {
             override fun onResult(response: StrResponse) {
                 if (!block.isCompleted)