Add text highlighting (#31442)

Co-authored-by: ScarKy0 <106310278+ScarKy0@users.noreply.github.com>
Co-authored-by: Hans Larsson <hanandlia@gmail.com>
Co-authored-by: Tobias Berger <toby@tobot.dev>

Content.Client/UserInterface/Systems/Chat/ChatUIController.cs

@@ -41,9 +41,10 @@ using Robust.Shared.Replays;
 using Robust.Shared.Timing;
 using Robust.Shared.Utility;
 
+
 namespace Content.Client.UserInterface.Systems.Chat;
 
-public sealed class ChatUIController : UIController
+public sealed partial class ChatUIController : UIController
 {
     [Dependency] private readonly IClientAdminManager _admin = default!;
     [Dependency] private readonly IChatManager _manager = default!;
@@ -240,6 +241,7 @@ public sealed class ChatUIController : UIController
 
         _config.OnValueChanged(CCVars.ChatWindowOpacity, OnChatWindowOpacityChanged);
 
+        InitializeHighlights();
     }
 
     public void OnScreenLoad()
@@ -426,6 +428,8 @@ public sealed class ChatUIController : UIController
     private void OnAttachedChanged(EntityUid uid)
     {
         UpdateChannelPermissions();
+
+        UpdateAutoFillHighlights();
     }
 
     private void AddSpeechBubble(ChatMessage msg, SpeechBubble.SpeechType speechType)
@@ -825,6 +829,12 @@ public sealed class ChatUIController : UIController
                 msg.WrappedMessage = SharedChatSystem.InjectTagInsideTag(msg, "Name", "color", GetNameColor(SharedChatSystem.GetStringInsideTag(msg, "Name")));
         }
 
+        // Color any words chosen by the client.
+        foreach (var highlight in _highlights)
+        {
+            msg.WrappedMessage = SharedChatSystem.InjectTagAroundString(msg, highlight, "color", _highlightsColor);
+        }
+
         // Color any codewords for minds that have roles that use them
         if (_player.LocalUser != null && _mindSystem != null && _roleCodewordSystem != null)
         {