chore: 企微绑定流程收尾 — 回调日志 + 调试完成

Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/api/wecom.py

@@ -109,11 +109,17 @@ async def wecom_callback_event(request: Request):
     event = (msg.findtext("Event", "") or "").strip()
     event_key = (msg.findtext("EventKey", "") or "").strip()
 
+    import logging
+    _log = logging.getLogger("wecom_callback")
+    _log.warning(f"wecom msg: type={msg_type} from={from_user} content={repr(content)} event={event} key={event_key}")
+
     # Triggers for binding
     if (msg_type == "text" and content == "绑定") or (msg_type == "event" and event == "click" and event_key == "BIND_ACCOUNT"):
+        _log.warning(f"wecom bind triggered for {from_user}")
         _handle_bind_request(from_user)
         return PlainTextResponse(content="success")
 
+    _log.warning(f"wecom msg ignored (no match)")
     return PlainTextResponse(content="success")