fix: use BookOpen icon for Docs button in settings sidebar

The Docs link in the settings sidebar was using the Info icon (circle
with "i"). Changed it to BookOpen which is the standard icon for
documentation links.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/browseros-agent/apps/agent/components/sidebar/SettingsSidebar.tsx

@@ -1,9 +1,9 @@
 import {
   ArrowLeft,
+  BookOpen,
   Bot,
   Compass,
   GitBranch,
-  Info,
   MessageSquare,
   Palette,
   RotateCcw,
@@ -90,7 +90,7 @@ const primarySettingsSections: NavSection[] = [
 ]
 
 const helpItems: NavItem[] = [
-  { name: 'Docs', href: 'https://docs.browseros.com/', icon: Info },
+  { name: 'Docs', href: 'https://docs.browseros.com/', icon: BookOpen },
   { name: 'Features', to: '/onboarding/features', icon: Compass },
   { name: 'Revisit Onboarding', to: '/onboarding', icon: RotateCcw },
 ]