feat: wire channel mode runtime config and docs

plugin/hooks/before-message-write.ts

@@ -1,7 +1,6 @@
 import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
 import { resolvePolicy, type DirigentConfig } from "../rules.js";
 import { getTurnDebugInfo, onSpeakerDone, setWaitingForHuman } from "../turn-manager.js";
-import { isMultiMessageMode } from "../core/channel-modes.js";
 
 type DebugConfig = {
   enableDebugLogs?: boolean;
@@ -20,6 +19,7 @@ type BeforeMessageWriteDeps = {
   shouldDebugLog: (config: DirigentConfig & DebugConfig, channelId?: string) => boolean;
   ensureTurnOrder: (api: OpenClawPluginApi, channelId: string) => Promise<void> | void;
   resolveDiscordUserId: (api: OpenClawPluginApi, accountId: string) => string | undefined;
+  isMultiMessageMode: (channelId: string) => boolean;
   sendModeratorMessage: (
     botToken: string,
     channelId: string,
@@ -45,6 +45,7 @@ export function registerBeforeMessageWriteHook(deps: BeforeMessageWriteDeps): vo
     shouldDebugLog,
     ensureTurnOrder,
     resolveDiscordUserId,
+    isMultiMessageMode,
     sendModeratorMessage,
     discussionService,
   } = deps;