SMSG_ITEM_ENCHANT_TIME_UPDATE carries the item's *enchantment* slot
(TEMP_ENCHANTMENT_SLOT = 1), not the equipment slot. Reading it as one labelled
every temporary enchant "Off Hand", even on a two-hander. Resolve the weapon slot
from the item GUID the packet already carries instead.
Render each enchant as the weapon's item icon with its remaining time across the
bottom, like the retail client, rather than a full-width labelled bar.
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