Two real bugs in handleTransfer plus a class issue across all the
channel-mod handlers.
/transfer didn't rename
handleTransfer set claimedBy but never called enqueueRename, so the
channel name stayed at whatever the previous claimer left it as.
/claim (applyClaim in handlers/buttons.js) does the rename via
makeTicketName + STAFF_EMOJIS; /transfer now does the same, plus
writes claimerId (was only writing claimedBy). Uses
'escalated-claimed' state when tier >= 1, 'claimed' otherwise.
DiscordAPIError 10062 (Unknown interaction)
handleAdd / handleRemove / handleTransfer / handleMove / handleTopic
all called interaction.reply() at the end after awaiting one or more
channelQueue ops. Those ops serialize behind any pending rename or
move on the same channel — easily exceeding Discord's 3s interaction-
token window. The reply then 404s with code 10062. Production logs
showed handleRemove failing this way (the visible 'Remove user
error: DiscordAPIError[10062]' lines); transfer had the same pattern.
Switch each handler to deferReply() up front + editReply() at the end
+ editReply() in the catch (with .catch(() => {}) to swallow the rare
case where even the deferred reply context is gone).
handleTransfer keeps the up-front isStaff role check as a reply()
because that path is synchronous and the token is fresh.