Mattermost: switch plugin-sdk imports to scoped subpaths (openclaw#36480)

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: Takhoffman <781889+Takhoffman@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

CHANGELOG.md

@@ -123,6 +123,8 @@ Docs: https://docs.openclaw.ai
 - LINE cleanup/test follow-ups: fold cleanup/test learnings into the synthesis review path while keeping runtime changes focused on regression fixes. (from #17630, #17289) Thanks @Clawborn and @davidahmann.
 - Mattermost/interactive buttons: add interactive button send/callback support with directory-based channel/user target resolution, and harden callbacks via account-scoped HMAC verification plus sender-scoped DM routing. (#19957) thanks @tonydehnke.
 
+- Mattermost/plugin SDK import policy: replace remaining monolithic `openclaw/plugin-sdk` imports in Mattermost mention-gating paths/tests with scoped subpaths (`openclaw/plugin-sdk/compat` and `openclaw/plugin-sdk/mattermost`) so `pnpm check` passes `lint:plugins:no-monolithic-plugin-sdk-entry-imports` on baseline. (#36480) Thanks @Takhoffman.
+
 ## 2026.3.2
 
 ### Changes

extensions/mattermost/src/group-mentions.test.ts

@@ -1,4 +1,4 @@
-import type { OpenClawConfig } from "openclaw/plugin-sdk";
+import type { OpenClawConfig } from "openclaw/plugin-sdk/mattermost";
 import { describe, expect, it } from "vitest";
 import { resolveMattermostGroupRequireMention } from "./group-mentions.js";
 

extensions/mattermost/src/group-mentions.ts

@@ -1,4 +1,5 @@
-import { resolveChannelGroupRequireMention, type ChannelGroupContext } from "openclaw/plugin-sdk";
+import { resolveChannelGroupRequireMention } from "openclaw/plugin-sdk/compat";
+import type { ChannelGroupContext } from "openclaw/plugin-sdk/mattermost";
 import { resolveMattermostAccount } from "./mattermost/accounts.js";
 
 export function resolveMattermostGroupRequireMention(

extensions/mattermost/src/mattermost/monitor.test.ts

@@ -1,4 +1,4 @@
-import type { OpenClawConfig } from "openclaw/plugin-sdk";
+import type { OpenClawConfig } from "openclaw/plugin-sdk/mattermost";
 import { describe, expect, it, vi } from "vitest";
 import { resolveMattermostAccount } from "./accounts.js";
 import {