feat(chat): Campaign CH slice CH1 — retail LogTextType color table

Retail colors chat lines by the 34-value wire LogTextType (ACE's
ChatMessageType), NOT by acdream's synthetic 9-value ChatKind. The old
ChatWindowController.RetailChatColor(ChatKind) collapsed distinct retail
colors onto one bucket per ChatKind — e.g. every Channel line rendered
colorLightBlue (Magic's slot) when retail's actual palette spans five
different colors across the Turbine rooms and legacy allegiance family.

Ports ChatInterface::BuildChatColorLookupTable @0x004F31C0 verbatim
(RetailChatColorTable, all 34 RGBA floats read from the PDB-paired
binary's .data section) and threads a new ChatEntry.LogTextType field
through every ingestion site to the correct retail wire value:
HearSpeech/Tell pass the wire chatType through verbatim; Emote/SoulEmote
hard-code 0x0C; the Tell self-echo hard-codes 0x04; legacy ChatChannel
broadcasts derive their type from the channel bit via the new
LegacyChannelChatType helper (ported from the decompiled
Handle_Communication__ChannelBroadcast dispatch, hear vs. own-send);
TurbineChat rooms map through TurbineChatDisplayNames.LogTextType;
CombatChatTranslator's hit/miss/evade lines map to ACE's CombatSelf/
CombatEnemy per Player_Combat.cs; kill/death lines use retail's
decompiled 0x00 Default (not a combat color). ChatWindowController's
transcript now folds LogTextType through RetailChatColorTable with
retail's exact "out-of-range keeps the previous line's color" carry
rule; ChatPanel's combat highlighting sources the same table.

Corrects HearSpeech.cs's doc-comment ChatType legend (4 of 6 entries
were wrong). Adds register row AP-175 for the pre-existing (unchanged)
Popup-renders-in-chat divergence and updates AP-39's stale per-ChatKind
description. Narrows ISSUES #139 — its chat-colors half is done.

Retail renders no chat timestamp prefix path exists in acdream today,
so the "timestamp is always colorGrey 0x0C" rule has nothing to attach
to; noted here per the research doc rather than left silent.

Research: docs/research/2026-08-09-chat-retail-color-table.md
Full Release suite: 11,833 passed / 4 skipped / 0 failed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/AcDream.UI.Abstractions/Panels/Chat/ChatVM.cs

@@ -112,7 +112,13 @@ public sealed class ChatVM : IDisposable
     /// client-handled commands (/help, /clear, future) to surface
     /// local feedback without round-tripping the server.
     /// </summary>
-    public void ShowSystemMessage(string text) => _log.OnSystemMessage(text, chatType: 0);
+    /// <remarks>
+    /// LogTextType <c>0x1A</c>: this text never reaches the wire — the
+    /// same "client-local text" category as retail's own command-parser
+    /// errors and <c>cant_jump_*</c> strings (research doc
+    /// <c>docs/research/2026-08-09-chat-retail-color-table.md</c> §2.2).
+    /// </remarks>
+    public void ShowSystemMessage(string text) => _log.OnSystemMessage(text, chatType: 0x1Au);
 
     /// <summary>
     /// Drain the chat log. Used by the /clear client-side command.
@@ -256,7 +262,9 @@ public sealed class ChatVM : IDisposable
     /// <see cref="ChatPanel"/> can pick the right rendering primitive
     /// per entry (plain <c>Text</c> for most kinds; <c>TextColored</c>
     /// for combat lines, with the rgba chosen from
-    /// <see cref="ChatEntry.CombatKind"/>).
+    /// <see cref="ChatEntry.CombatKind"/>). Campaign CH slice CH1 also
+    /// carries <see cref="ChatEntry.LogTextType"/> through — the retail
+    /// color key, keyed independently of <see cref="ChatKind"/>.
     /// </summary>
     public IReadOnlyList<FormattedLine> RecentLinesDetailed()
     {
@@ -272,7 +280,8 @@ public sealed class ChatVM : IDisposable
             lines[i] = new FormattedLine(
                 Text: FormatEntry(entry),
                 Kind: entry.Kind,
-                CombatKind: entry.CombatKind);
+                CombatKind: entry.CombatKind,
+                LogTextType: entry.LogTextType);
         }
         return lines;
     }
@@ -284,7 +293,12 @@ public sealed class ChatVM : IDisposable
 /// <see cref="CombatKind"/> to pick a rendering primitive
 /// (<c>Text</c> vs <c>TextColored(rgba)</c>).
 /// </summary>
+/// <param name="LogTextType">
+/// Campaign CH slice CH1: the retail wire <c>LogTextType</c> that keys
+/// <see cref="RetailChatColorTable"/> — see <see cref="ChatEntry.LogTextType"/>.
+/// </param>
 public readonly record struct FormattedLine(
     string Text,
     ChatKind Kind,
-    CombatLineKind? CombatKind);
+    CombatLineKind? CombatKind,
+    uint LogTextType);