feat(chunk-renderer): wire DrawIcon + icon-dispatch + EmoteCache path

Completes the ChunkRenderer pipeline. DrawIcon is a 1:1 port of v1.5.6
ChatLogWindow.DrawIcon (GFD-icon font-relative rendering via
Plugin.TextureProvider + ImGuiUtil.PostPayload). C2's TODO(C3) stub in
DrawChunk's IconChunk branch is replaced with the real dispatch.
EmotePayload special-case wired via EmoteCache.GetEmote (static helper
per §6.8).

Also adds a one-line rationale comment for the surviving _logger discard
(C2 code-quality-review polish — discard kept because _logger is not yet
consumed; E-task wiring will likely add call-sites later).

HellionChat/Ui/Components/ChunkRenderer.cs

@@ -2,6 +2,7 @@ using System.Collections.Generic;
 using System.Numerics;
 using Dalamud.Bindings.ImGui;
 using Dalamud.Game.Text.SeStringHandling.Payloads;
+using Dalamud.Interface.Utility;
 using Dalamud.Interface.Utility.Raii;
 using HellionChat.Code;
 using HellionChat.Themes;
@@ -33,6 +34,7 @@ internal sealed class ChunkRenderer
         // names change every plugin reload to avoid stable cross-session linkage.
         _salt = new Random().Next().ToString();
 
+        // Not yet consumed in C2/C3; E-task wiring will likely add log call-sites later.
         _ = _logger;
     }
 
@@ -82,9 +84,9 @@ internal sealed class ChunkRenderer
         float lineWidth = 0f
     )
     {
-        if (chunk is IconChunk)
+        if (chunk is IconChunk iconChunk)
         {
-            // TODO(C3): wire DrawIcon dispatch + EmotePayload image path here.
+            DrawIcon(chunk, iconChunk, handler);
             return;
         }
 
@@ -173,6 +175,30 @@ internal sealed class ChunkRenderer
             (useCustomItalicFont ? _fonts.ItalicFont! : _fonts.AxisItalic).Pop();
     }
 
+    internal void DrawIcon(Chunk chunk, IconChunk icon, PayloadHandler? handler)
+    {
+        if (!IconUtil.GfdFileView.TryGetEntry((uint)icon.Icon, out var entry))
+            return;
+
+        var iconTexture = Plugin
+            .TextureProvider.GetFromGame("common/font/fonticon_ps5.tex")
+            .GetWrapOrDefault();
+        if (iconTexture == null)
+            return;
+
+        var texSize = new Vector2(iconTexture.Width, iconTexture.Height);
+
+        var sizeRatio = FontManager.GetFontSize() / entry.Height;
+        var size = new Vector2(entry.Width, entry.Height) * sizeRatio * ImGuiHelpers.GlobalScale;
+
+        var uv0 = new Vector2(entry.Left, entry.Top + 170) * 2 / texSize;
+        var uv1 =
+            new Vector2(entry.Left + entry.Width, entry.Top + entry.Height + 170) * 2 / texSize;
+
+        ImGui.Image(iconTexture.Handle, size, uv0, uv1);
+        ImGuiUtil.PostPayload(chunk, handler);
+    }
+
     private string HidePlayerInString(string str, string playerName, uint worldId)
     {
         var expected = _gameFunctions.Chat.AbbreviatePlayerName(playerName);