fix: update replyToMode notes (#11062) (thanks @cordx56)

CHANGELOG.md

@@ -46,6 +46,7 @@ Docs: https://docs.openclaw.ai
 - Slack: detect control commands when channel messages start with bot mention prefixes (for example, `@Bot /new`). (#14142) Thanks @beefiker.
 - Signal: enforce E.164 validation for the Signal bot account prompt so mistyped numbers are caught early. (#15063) Thanks @Duartemartins.
 - Discord: process DM reactions instead of silently dropping them. (#10418) Thanks @mcaxtr.
+- Discord: respect replyToMode in threads. (#11062) Thanks @cordx56.
 - Heartbeat: filter noise-only system events so scheduled reminder notifications do not fire when cron runs carry only heartbeat markers. (#13317) Thanks @pvtclawn.
 - Signal: render mention placeholders as `@uuid`/`@phone` so mention gating and Clawdbot targeting work. (#2013) Thanks @alexgleason.
 - Discord: omit empty content fields for media-only messages while preserving caption whitespace. (#9507) Thanks @leszekszpunar.

src/auto-reply/reply/reply-reference.ts

@@ -11,7 +11,7 @@ export type ReplyReferencePlanner = {
 
 export function createReplyReferencePlanner(options: {
   replyToMode: ReplyToMode;
-  /** Existing thread/reference id (always used when present). */
+  /** Existing thread/reference id (preferred when allowed by replyToMode). */
   existingId?: string;
   /** Id to start a new thread/reference when allowed (e.g., parent message id). */
   startId?: string;