A host from the web site; the same page kept once; deleting from the Notebooks chooser

From the development repository at 299f73d, 2026-10-11:
hosting from the site documented; a page loaded from a notebook and left
unchanged is not kept again; notebooks and pages are deleted from the
chooser, to the system's Trash (--trash); the Notebooks button.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

client/js/main.js

@@ -9,7 +9,7 @@ import {
   parseInvitation, saveIdentity,
 } from './crypto.js';
 import {
-  NotebookWriter, keepCurrentPage, keepIdentity, listKeptPages, listNotebooks, notebooksInBrowser,
+  NotebookWriter, discardNotebook, discardPage, keepCurrentPage, keepIdentity, listKeptPages, listNotebooks, notebooksInBrowser,
   readCurrentPage, readIdentity, readPage, rememberToken, useBrowserStorage,
 } from './notebook.js';
 import { download, pickImageFile } from './browser_files.js';
@@ -1091,6 +1091,9 @@ async function enterSession(invitationText, name, notebook) {
     }
     log(`Notebook page loaded: ${chosenNotebook} / ${pageName}`);
     session.loadPage(kept.page);
+  }, () => {
+    // A deleted notebook leaves the toolbar's list.
+    showNotebooks(sessionPicker).catch(() => {});
   });
   element('load_notebook_page').addEventListener('click', () => { chooser.open(writer.notebook); });
 
@@ -1218,7 +1221,7 @@ async function enterSession(invitationText, name, notebook) {
   // For looking at the session from the browser's console during development.
   Object.assign(window, { kokkoja: {
     session, renderer, writer, loadImage, textEditor,
-    notebook: { listNotebooks, listKeptPages, readPage, readCurrentPage, notebooksInBrowser },
+    notebook: { listNotebooks, listKeptPages, readPage, readCurrentPage, notebooksInBrowser, discardNotebook, discardPage },
   } });
 }