add testing suite

src/textUtils.js

@@ -0,0 +1,10 @@
+/** Strip markdown artifacts and normalize whitespace. Pure, no side effects. */
+export function cleanText(str) {
+  if (!str) return "";
+  return str
+    .replace(/^#+\s*/gm, "")
+    .replace(/\*\*(.*?)\*\*/g, "$1")
+    .replace(/[*_`]/g, "")
+    .replace(/\s+/g, " ")
+    .trim();
+}