fix: preserve subagent thread routing (#1241)

Thanks @gnarco.

Co-authored-by: gnarco <gnarco@users.noreply.github.com>

src/auto-reply/reply/get-reply-inline-actions.ts

@@ -168,6 +168,8 @@ export async function handleInlineActions(params: {
         agentSessionKey: sessionKey,
         agentChannel: channel,
         agentAccountId: (ctx as { AccountId?: string }).AccountId,
+        agentTo: ctx.OriginatingTo ?? ctx.To,
+        agentThreadId: ctx.MessageThreadId ?? undefined,
         agentDir,
         workspaceDir,
         config: cfg,