fix: wechatapp单例锁端口19528→19531 避免与qqapp/wecomapp冲突

frontends/wechatapp.py

@@ -323,7 +323,7 @@ def on_message(bot, msg):
     threading.Thread(target=_handle, daemon=True).start()
 
 if __name__ == '__main__':
-    try: _lock = socket.socket(socket.AF_INET, socket.SOCK_STREAM); _lock.bind(('127.0.0.1', 19528))
+    try: _lock = socket.socket(socket.AF_INET, socket.SOCK_STREAM); _lock.bind(('127.0.0.1', 19531))
     except OSError: print('[WeChat] Another instance running, exiting.'); sys.exit(1)
     _logf = open(os.path.join(os.path.dirname(os.path.dirname(__file__)), 'temp', 'wechatapp.log'), 'a', encoding='utf-8', buffering=1)
     sys.stdout = sys.stderr = _logf