fix(weixin): avoid cross-loop send session reuse

[yannisxu]

Bug Description

Sending messages from Hermes to Weixin could fail intermittently when an async tool execution ran on a different event loop than the live Weixin adapter session.

Root Cause

The live Weixin adapter kept a long-lived aiohttp send session, but `send_

[alt-glitch]

Likely duplicate of #13520 (and #14384, #13350, #14873) — same root cause: cross-event-loop aiohttp session reuse in Weixin adapter send path.

[teknium1]

Thanks for the focused diagnosis. This is already implemented on current main.

Automated hermes-sweeper review verified:

• gateway/platforms/weixin.py:2309-2311 reuses a live adapter only when send_session._loop is asyncio.get_running_loop().
• A loop mismatch falls through to the fresh one-shot aiohttp.ClientSession path at gateway/platforms/weixin.py:2336, covering text and media delivery.
• The matching fix landed in a22465e07ab4b71019f711e7a6463f6590c50742 (fix(weixin): send_weixin_direct cross-loop session check) and is included in v2026.5.7.
• This matches the duplicate cluster identified in the member discussion, including fix(weixin): avoid cross-loop live session reuse #13520, fix: avoid cross-loop session reuse in Weixin direct sends #14384, fix: avoid cross-loop reuse in weixin direct send #13350, and fix(weixin): guard live_adapter session reuse against cross-loop calls #14873.

Closing as implemented on main.