feat: itchat show qrcode using viewer

channel/wechat/wechat_channel.py

@@ -70,6 +70,13 @@ def _check(func):
 def qrCallback(uuid,status,qrcode):
     # logger.debug("qrCallback: {} {}".format(uuid,status))
     if status == '0':
+        try:
+            from PIL import Image
+            img = Image.open(io.BytesIO(qrcode))
+            thread_pool.submit(img.show,"QRCode")
+        except Exception as e:
+            pass
+
         import qrcode
         url = f"https://login.weixin.qq.com/l/{uuid}"