feat: support per-channel ackReaction config (#17092) (thanks @zerone0x)

docs/channels/telegram.md

@@ -571,6 +571,23 @@ curl "https://api.telegram.org/bot<bot_token>/getUpdates"
 
   </Accordion>
 
+  <Accordion title="Ack reactions">
+    `ackReaction` sends an acknowledgement emoji while OpenClaw is processing an inbound message.
+
+    Resolution order:
+
+    - `channels.telegram.accounts.<accountId>.ackReaction`
+    - `channels.telegram.ackReaction`
+    - `messages.ackReaction`
+    - agent identity emoji fallback (`agents.list[].identity.emoji`, else "👀")
+
+    Notes:
+
+    - Telegram expects unicode emoji (for example "👀").
+    - Use `""` to disable the reaction for a channel or account.
+
+  </Accordion>
+
   <Accordion title="Config writes from Telegram events and commands">
     Channel config writes are enabled by default (`configWrites !== false`).