fix(bot): channel auto-replies now render as outgoing in history

tryBotReplyChannel() mirrored its own reply into the on-device history
prefixed with the node's own name instead of the "Me: " convention the
history view uses to tell an outgoing bubble from an incoming one, so
the bot's own reply rendered left-anchored like a message from someone
else labelled with the device's own name.

examples/companion_radio/MyMeshBot.h

@@ -200,8 +200,11 @@ void MyMesh::tryBotReplyChannel(uint8_t channel_idx, const char* text, uint8_t h
     _bot_reply_count++;
 #ifdef DISPLAY_CLASS
     if (_ui) {
-      char with_sender[240];  // node_name(32) + ": "(2) + expanded(200) + margin
-      snprintf(with_sender, sizeof(with_sender), "%s: %s", _prefs.node_name, expanded);
+      // "Me: " (not node_name) -- MessagesScreen recognises an outgoing bubble
+      // by that literal prefix (see computeBubbleBox's caller), same framing
+      // MessagesScreen::afterSend and the app-originated-post mirror use.
+      char with_sender[240];  // "Me: "(4) + expanded(200) + margin
+      snprintf(with_sender, sizeof(with_sender), "Me: %s", expanded);
       _ui->addChannelMsg(channel_idx, with_sender, 0, nullptr, 0, true);  // own_message: our own bot reply, never unread
     }
 #endif