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/notebook.js

@@ -34,12 +34,15 @@ const RETRY_MS = 3000;
  * @typedef {object} Backend
  * @property {() => Promise<string | null>} readIdentity
  * @property {(text: string) => Promise<boolean>} keepIdentity
- * @property {() => Promise<{directory: string, notebooks: string[]}>} listNotebooks
- *     The directory is '' when the notebooks are in the browser.
+ * @property {() => Promise<{directory: string, notebooks: string[], trash: boolean}>} listNotebooks
+ *     The directory is '' when the notebooks are in the browser; trash
+ *     says whether a deleted notebook or page goes to one, or is gone for good.
  * @property {(notebook: string) => Promise<string[]>} listPages  Every page file, Current.svg too.
  * @property {(notebook: string, pageName: string) => Promise<string | null>} readPage
  * @property {(notebook: string, pageName: string, text: string) => Promise<void>} writePage
  * @property {(notebook: string) => Promise<{kept: string | null, new: boolean}>} keepPage
+ * @property {(notebook: string) => Promise<void>} discardNotebook  Delete a notebook, pages and all.
+ * @property {(notebook: string, pageName: string) => Promise<void>} discardPage  Delete a kept page.
  */
 
 /**
@@ -113,6 +116,14 @@ const inFiles = /** @type {Backend} */ ({
     if (!response.ok) throw new Error(`The page could not be kept (${response.status}).`);
     return response.json();
   },
+  async discardNotebook(notebook) {
+    const response = await request('DELETE', [notebook]);
+    if (!response.ok) throw new Error(`The notebook “${notebook}” could not be deleted (${response.status}).`);
+  },
+  async discardPage(notebook, pageName) {
+    const response = await request('DELETE', [notebook, pageName]);
+    if (!response.ok) throw new Error(`The page ${pageName} could not be deleted (${response.status}).`);
+  },
 });
 
 let backend = inFiles;
@@ -146,12 +157,32 @@ export function keepIdentity(text) {
 }
 
 /**
- * @returns {Promise<{directory: string, notebooks: string[]}>}
+ * @returns {Promise<{directory: string, notebooks: string[], trash: boolean}>}
  */
 export function listNotebooks() {
   return backend.listNotebooks();
 }
 
+/**
+ * Delete a notebook with every page in it: to the Trash where the
+ * local program has one, for good otherwise (listNotebooks says which).
+ * @param {string} notebook
+ * @returns {Promise<void>}
+ */
+export function discardNotebook(notebook) {
+  return backend.discardNotebook(notebook);
+}
+
+/**
+ * Delete a kept page, likewise.
+ * @param {string} notebook
+ * @param {string} pageName
+ * @returns {Promise<void>}
+ */
+export function discardPage(notebook, pageName) {
+  return backend.discardPage(notebook, pageName);
+}
+
 /**
  * @param {string} notebook
  * @returns {Promise<string[]>}  The names of the pages kept in the