fix: allow retrying themes load on error

templates/anime.gohtml

@@ -388,6 +388,12 @@
   if (closeBtn) closeBtn.addEventListener('click', close);
   dialog.addEventListener('click', (e) => { if (e.target === dialog) close(); });
   document.addEventListener('keydown', (e) => { if (e.key === 'Escape') close(); });
+
+  const loader = document.querySelector('[data-themes-loader]');
+  if (loader) {
+    loader.addEventListener('htmx:responseError', () => { themesRequested = false; });
+    loader.addEventListener('htmx:sendError', () => { themesRequested = false; });
+  }
 })();
 </script>