Kokkoja as of 2026-10-10: the teacher's requests, the Session window, notices, the QR code, the license

client/js/browser_notebook.js

@@ -137,9 +137,8 @@ export const backend = {
   async keepPage(notebook) {
     return transaction('readwrite', async (pages) => {
       const current = /** @type {StoredPage | undefined} */ (await result(pages.get([notebook, CURRENT_PAGE])));
-      if (!current || !(current.text.includes('data-stroke=') || current.text.includes('<image'))) {
-        return { kept: null, new: false };
-      }
+      const blank = !['data-stroke=', 'data-text=', '<image'].some((mark) => current?.text.includes(mark));
+      if (!current || blank) return { kept: null, new: false };
       const kept = (await pagesOf(pages, notebook)).filter((page) => KEPT_PAGE.test(page.name));
       const same = kept.find((page) => page.text === current.text);
       if (same) return { kept: same.name, new: false };