delete menu when no

src/bot.ts

@@ -62,7 +62,22 @@ export class WeComBot extends Bot<BotConfig> {
   }
 
   private async initializeMenu() {
-    if (!this.config.menus?.length) return true;
+    if (!this.config.menus?.length) {
+      const data = await this.http.get<WecomSendMessageResponse>(
+        'https://qyapi.weixin.qq.com/cgi-bin/menu/delete',
+        {
+          params: {
+            access_token: await this.getToken(),
+            agentid: this.config.agentId,
+          },
+        },
+      );
+      if (data.errcode) {
+        this.logger.error(`Failed to remove menu: ${data.errmsg}`);
+        return false;
+      }
+      return true;
+    }
     const button = this.config.menus.map((menu) =>
       adaptMenu(menu, this.buttonKeyMap),
     );