Chores, Family page, genre search, child accounts, wider Search and Notifications center

- Chores tab with repeats, points and a week/month board
- Family page: calendar, chores, shopping, notes, chat and tasks on one start page
- Genre search in the Store, Free Books and LibriVox
- Child accounts: safe content, daily limit and bedtime, ask a parent
- Search now covers notes, chat, contacts, chores, recipes and your books
- Notifications center: bell with a per-person list of chat, reminders and announcements
- Roadmap, README and tests updated

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/sw.js

@@ -1,5 +1,5 @@
 // App-shell cache only; Seafile/API traffic always goes to the network.
-const CACHE = 'hub-v64';
+const CACHE = 'hub-v70';
 const SHARE = 'hub-share'; // files shared into the app from other apps, held until the person picks a folder
 const SHELL = ['/icon.svg', '/manifest.webmanifest', '/icons/icon-192.png', '/icons/apple-touch-icon.png'];