Summary

Google Chat replies sent through message(action=send) with [[reply_to_current]] can post as top-level space messages even when the inbound Google Chat event includes message.thread.name and the account has replyToMode: "all".

Repro / Evidence

• Inbound debug showed replyToMode: "all".
• Inbound debug showed threadName: "spaces/.../threads/...".
• The agent used the message tool with [[reply_to_current]].
• Before the fix, the message posted outside the original Google Chat thread.
• A live patch that maps the Google Chat tool context current reply target to context.ReplyToId made replies stay in the original thread.

Expected

When Google Chat inbound events provide message.thread.name, [[reply_to_current]] should target spaces/.../threads/....

Actual

Google Chat message tool replies can resolve without the thread resource and post outside the original thread.