fix(combat): strip HTML tags + newlines before regex matching

DECAL's ChatBoxMessage delivers raw text with HTML tags and trailing
\r\n that break the ^...$ regex anchors in every combat pattern.
ProcessChatLine now strips tags and trims before matching, same as
ChatEventRouter.NormalizeChatLine does for the WebSocket chat stream.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

MosswartMassacre/CombatStatsTracker.cs

@@ -73,6 +73,12 @@ namespace MosswartMassacre
 
             try
             {
+                // DECAL ChatBoxMessage delivers raw text with HTML tags and
+                // trailing newlines. Strip them so ^...$ regex anchors work.
+                text = System.Text.RegularExpressions.Regex.Replace(text, "<[^>]+>", "");
+                text = text.TrimEnd('\r', '\n', ' ');
+                if (string.IsNullOrEmpty(text)) return;
+
                 // Skip non-combat chat (tells, channels, etc.)
                 if (IsNonCombatChat(text)) return;