fix(slack): land #31028 from @taw0002

Co-authored-by: taw0002 <webmaster@sodsolutions.com>

CHANGELOG.md

@@ -20,6 +20,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Slack/Announce target account routing: enable session-backed announce-target lookup for Slack so multi-account announces resolve the correct `accountId` instead of defaulting to bot-token context. Landed from contributor PR #31028 by @taw0002. Thanks @taw0002.
 - Tools/Edit workspace boundary errors: preserve the real `Path escapes workspace root` failure path instead of surfacing a misleading access/file-not-found error when editing outside workspace roots. Landed from contributor PR #31015 by @haosenwang1018. Thanks @haosenwang1018.
 - Sandbox/mkdirp boundary checks: allow directory-safe boundary validation for existing in-boundary subdirectories, preventing false `cannot create directories` failures in sandbox write mode. (#30610) Thanks @glitch418x.
 - Android/Voice screen TTS: stream assistant speech via ElevenLabs WebSocket in Talk Mode, stop cleanly on speaker mute/barge-in, and ignore stale out-of-order stream events. (#29521) Thanks @gregmousseau.

extensions/slack/src/channel.test.ts

@@ -16,6 +16,10 @@ vi.mock("./runtime.js", () => ({
 import { slackPlugin } from "./channel.js";
 
 describe("slackPlugin actions", () => {
+  it("prefers session lookup for announce target routing", () => {
+    expect(slackPlugin.meta.preferSessionLookupForAnnounceTarget).toBe(true);
+  });
+
   it("forwards read threadId to Slack action handler", async () => {
     handleSlackActionMock.mockResolvedValueOnce({ messages: [], hasMore: false });
     const handleAction = slackPlugin.actions?.handleAction;

extensions/slack/src/channel.ts

@@ -67,6 +67,7 @@ export const slackPlugin: ChannelPlugin<ResolvedSlackAccount> = {
   id: "slack",
   meta: {
     ...meta,
+    preferSessionLookupForAnnounceTarget: true,
   },
   onboarding: slackOnboardingAdapter,
   pairing: {