feat(dingtalk): add QR code auth support and fix 3 critical bugs

- feat: support one-click QR scan to create DingTalk bot and establish connection
- fix(gateway): wrap blocking DingTalkStreamClient.start() with asyncio.to_thread()
- fix(gateway): extract message fields from CallbackMessage payload instead of ChatbotMessage
- fix(gateway): add oapi.dingtalk.com to allowed webhook URL domains

gateway/config.py

@@ -1038,6 +1038,25 @@ def _apply_env_overrides(config: GatewayConfig) -> None:
         if webhook_secret:
             config.platforms[Platform.WEBHOOK].extra["secret"] = webhook_secret
 
+    # DingTalk
+    dingtalk_client_id = os.getenv("DINGTALK_CLIENT_ID")
+    dingtalk_client_secret = os.getenv("DINGTALK_CLIENT_SECRET")
+    if dingtalk_client_id and dingtalk_client_secret:
+        if Platform.DINGTALK not in config.platforms:
+            config.platforms[Platform.DINGTALK] = PlatformConfig()
+        config.platforms[Platform.DINGTALK].enabled = True
+        config.platforms[Platform.DINGTALK].extra.update({
+            "client_id": dingtalk_client_id,
+            "client_secret": dingtalk_client_secret,
+        })
+        dingtalk_home = os.getenv("DINGTALK_HOME_CHANNEL")
+        if dingtalk_home:
+            config.platforms[Platform.DINGTALK].home_channel = HomeChannel(
+                platform=Platform.DINGTALK,
+                chat_id=dingtalk_home,
+                name=os.getenv("DINGTALK_HOME_CHANNEL_NAME", "Home"),
+            )
+
     # Feishu / Lark
     feishu_app_id = os.getenv("FEISHU_APP_ID")
     feishu_app_secret = os.getenv("FEISHU_APP_SECRET")