/iblai-navbar

Add a responsive top navigation bar with:

• Left: Logo + page links
• Right: Notification bell + user profile dropdown

The navbar matches the ibl.ai skillsai reference app and is fully responsive -- desktop shows inline links, tablet/mobile collapses to a hamburger drawer.

Do NOT add custom styles, colors, or CSS overrides to ibl.ai SDK components. They ship with their own styling. Keep the components as-is. Do NOT implement dark mode unless the user explicitly asks for it. Do NOT add Lucide icons next to nav link labels. Links are text-only.