Family devices: shared-screen family board with a who-is-this profile picker

- Admin can make a screen a family device; it opens on a family board
- Name tiles with KID labels; kids tap, others enter a PIN (lockout after 5 wrong tries)
- Name label with Switch user, auto-return to the board after 5 idle minutes
- Short 30-minute sessions on family devices
- Settings section for PIN and turning a device on or off
- Test, README and roadmap updated

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

notes.js

@@ -65,4 +65,6 @@ function search(me, q) {
     const at = text.toLowerCase().indexOf(needle); out.push({ id: n.id, type: n.type, title: n.title || (n.type === 'list' ? 'Checklist' : 'Note'), snippet: (at > 20 ? '…' : '') + text.slice(Math.max(0, at - 20), Math.max(0, at - 20) + 90), share: n.share === 'family' ? 'Family' : n.share === 'me' ? 'Just me' : 'Shared' }); }
   return out.slice(0, 8);
 }
-module.exports = { handle, search };
+/** Notes and lists shared with the whole family, for the family board. */
+const familyNotes = () => all().filter(n => n.share === 'family' && !n.archived).sort((a, b) => (b.pinned - a.pinned) || b.updated - a.updated).slice(0, 6).map(n => ({ id: n.id, type: n.type, title: n.title || (n.type === 'list' ? 'Checklist' : 'Note'), pinned: n.pinned, total: n.items.length, done: n.items.filter(i => i.done).length, next: (n.items.find(i => !i.done) || {}).text || '', body: n.type === 'note' ? n.body.slice(0, 120) : '' }));
+module.exports = { handle, search, familyNotes };