fix(weixin): send_weixin_direct cross-loop session check

When send_message tool is called from inside a running gateway, the
_run_async bridge spawns a worker thread with a separate event loop.
send_weixin_direct then reuses the live adapter's aiohttp session
which was created on the gateway's main loop.  aiohttp's TimerContext
checks asyncio.current_task(loop=session._loop) and sees None because
we're executing on the worker thread's loop → raises 'Timeout context
manager should be used inside a task'.

Fix: skip the live-adapter shortcut when the session belongs to a
different event loop, falling through to the fresh-session path.

gateway/platforms/weixin.py

@@ -2030,7 +2030,9 @@ async def send_weixin_direct(
 
     live_adapter = _LIVE_ADAPTERS.get(resolved_token)
     send_session = getattr(live_adapter, '_send_session', None)
-    if live_adapter is not None and send_session is not None and not send_session.closed:
+    if (live_adapter is not None and send_session is not None
+            and not send_session.closed
+            and send_session._loop is asyncio.get_running_loop()):
         last_result: Optional[SendResult] = None
         cleaned = live_adapter.format_message(message)
         if cleaned: