feat(ui): Little Blue view — caretaker chat + actions panel

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/components/sidebar.js

@@ -92,6 +92,7 @@ export function renderSidebar(root) {
       el('div', { class: 'sb-title' }, 'Navigate'),
       navItem('Sacred Valley', '/sacred-valley'),
       navItem('Sentinel', '/sentinel'),
+      navItem('Little Blue', '/little-blue'),
       navItem('Search', '/search'),
       inboxItem,
       navItem('Jobs', '/jobs'),