fix: remove ack reactions after reply (#633) (thanks @levifig)

docs/gateway/configuration.md

@@ -948,7 +948,8 @@ See [Messages](/concepts/messages) for queueing, sessions, and streaming context
   messages: {
     responsePrefix: "🦞", // or "auto"
     ackReaction: "👀",
-    ackReactionScope: "group-mentions"
+    ackReactionScope: "group-mentions",
+    removeAckAfterReply: false
   }
 }
 ```
@@ -975,6 +976,9 @@ active agent’s `identity.emoji` when set, otherwise `"👀"`. Set it to `""` t
 - `direct`: direct messages only
 - `all`: all messages
 
+`removeAckAfterReply` removes the bot’s ack reaction after a reply is sent
+(Slack/Discord/Telegram only). Default: `false`.
+
 ### `talk`
 
 Defaults for Talk mode (macOS/iOS/Android). Voice IDs fall back to `ELEVENLABS_VOICE_ID` or `SAG_VOICE_ID` when unset.