Fix mailbox right-click (transposed CMSG_GAMEOBJECT_USE opcode, missing
mail opcodes in Turtle WoW JSON, decorative GO type filtering). Add
expansion-aware mail packet handling via PacketParsers: Classic format
(single item, no msgSize prefix, Vanilla field order) vs WotLK format
(attachment arrays, enchant slots). Fix CMSG_MAIL_TAKE_ITEM and
CMSG_MAIL_DELETE for Vanilla (no trailing fields). Add pulsing "New
Mail" indicator below minimap, SMSG_RECEIVED_MAIL and
MSG_QUERY_NEXT_MAIL_TIME handlers, and async sender name backfill.
1cfe186c62