Improve chat session history restore with clickable player links

[liamcooper]

Summary

Single-file change: EllesmereUIChat/EllesmereUIChat_SessionHistory.lua.

Clickable player names (realm chat)

• Unified player-link helpers (FormatPlayerChatLine, RebuildPlayerMessageOnRestore, PlayerHyperlink) for all captured player-linked types: say, yell, party, guild, officer, raid, channel, whisper (in/out).
• Capture stores playerName, rawBody, lineID, and guid so lines can be rebuilt with |Hplayer: links after /reload.
• Uses Blizzard CHAT_*_GET templates via ApplyChatTemplate, with correct handling for both single-%s (say/yell/whisper) and double-%s (party/guild/raid/channel) formats.
• Falls back to plain formatted lines when links cannot be built (e.g. secret values).

BN whispers

• Persists bnSenderID, bnPlayerToken, rawBody, and guid; rebuilds |HBNplayer: links on restore.
• Refreshes BN display names after reload via RefreshBNLinksInMessage.
• Drops legacy BN rows on sanitize that lack bnSenderID and have no |HBNplayer: link in the stored message.

Channel-aware restore

• Captures channelName, channelBaseName, zoneChannelID, and channelIndex.
• FrameShowsChannelEntry mirrors Blizzard channelList / zoneChannelList matching so Trade vs General (and similar) restore to the correct tab.

Dedupe and direction

• Stored-entry dedupe keys: p:CHATTYPE:NAME:payload and bn:CHATTYPE:ID:payload (incoming/outgoing no longer collapse when body text matches).
• Frame-side dedupe (BuildFrameMessageSet, PlayerLinkedDedupKeysFromStored) uses the same key shape to avoid double-restore after /reload.
• Restore uses full chat types from events (WHISPER_INFORM, BN_WHISPER_INFORM, etc.) instead of stripping _INFORM.

Capture quality

• ChatMessageBody and ChatSenderName resolve body/sender from lineID first, then event args, so stored rawBody/playerName match the displayed line.
• Legacy migration: parsers extract name/body from old plain-text saved lines; whisperPlayerName is still read for backward compatibility.

Removed / unchanged behavior

• Emotes removed from capture (CHAT_MSG_EMOTE, CHAT_MSG_TEXT_EMOTE) and dropped on sanitize.
• Still open-world capture only; instance/restricted chat not persisted (existing limitation).

Test plan

• /reload after /say and /yell — sender name is clickable
• Party/guild/raid messages restore with clickable names
• Trade channel message restores to Trade tab, not General
• Incoming and outgoing whispers with identical text both restore (no dedupe collapse)
• BN whisper in/out restores with clickable BN link and correct direction
• BN friend display name updates correctly after /reload
• Legacy BN rows without bnSenderID/links are dropped on sanitize (expected)
• Emote lines are not captured or restored