chore: debug cookies better

apps/dashboard/src/lib/utils/functions/cookies.ts

@@ -0,0 +1,13 @@
+import type { Cookies } from '@sveltejs/kit';
+
+/**
+ * Returns the classroomio cookie string for API/auth requests.
+ * Filters cookies whose names include "classroomio" and joins them as `name=value; ...`.
+ */
+export function getCioCookieString(cookies: Cookies): string {
+  return cookies
+    .getAll()
+    .filter((c) => c.name.includes('classroomio'))
+    .map((c) => `${c.name}=${c.value}`)
+    .join('; ');
+}