Code review cleanup for thinking display (#18720)

packages/cli/src/ui/utils/textUtils.ts

@@ -143,6 +143,13 @@ export function sanitizeForDisplay(str: string, maxLength?: number): string {
   return sanitized;
 }
 
+/**
+ * Normalizes escaped newline characters (e.g., "\\n") into actual newline characters.
+ */
+export function normalizeEscapedNewlines(value: string): string {
+  return value.replace(/\\r\\n/g, '\n').replace(/\\n/g, '\n');
+}
+
 const stringWidthCache = new LRUCache<string, number>(
   LRU_BUFFER_PERF_CACHE_LIMIT,
 );