fix: escape special regex characters in namesMatch function

Character names containing regex special chars (like brackets) were
causing 'Invalid regular expression' errors when building character
thoughts HTML. Now properly escapes characters before RegExp creation.

src/systems/rendering/thoughts.js

@@ -51,7 +51,9 @@ function namesMatch(cardName, aiName) {
     if (cardCore === aiCore) return true;
 
     // 3. Check if card name appears as complete word in AI name
-    const wordBoundary = new RegExp(`\\b${cardCore}\\b`);
+    // Escape special regex characters to prevent "Invalid regular expression" errors
+    const escapedCardCore = cardCore.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+    const wordBoundary = new RegExp(`\\b${escapedCardCore}\\b`);
     return wordBoundary.test(aiCore);
 }