Now I'll enhance the sidebar to match your exact specifications with the complete menu structure, multi-level nesting, notification badges, and refined visual design:

I've completely redesigned the sidebar with the following enhancements:

Key Features Implemented:

• Complete Menu Structure: All 9 main groups with multi-level nesting (up to 3 levels deep)
• Accordion Behavior: Only one main group opens at a time with smooth 180-degree chevron rotation
• Notification Badges: Red badges on items with pending actions (Booking Proposal: 3, Distribution Request: 5)
• Tooltip Support: When collapsed, hovering over icons shows the label
• Enhanced Styling: Left accent bar (3px) that highlights on hover, minimal background with proper contrast
• Smooth Animations: 200ms transitions on all interactive elements
• Dark Mode Ready: Uses semantic CSS variables for automatic theme support

The nested structure now properly handles complex hierarchies like Booking → Booking Số Lượng → 6 child items, making the Vietnamese business workflow intuitive to navigate.

I'll fix the routing so all sidebar pages are accessible while maintaining the layout. Let me first check the current structure:

Now I understand the issue. The problem is that pages outside /dashboard don't have the layout wrapper. I need to restructure so all pages share the same layout. Let me create the proper routing structure:

Now let me update the root layout to include the DashboardLayout:

Now let me update all the layout files to just pass through children:

I've fixed the routing issue. Here's what I did:

Changes Made:

1. Root Layout (app/layout.tsx): Wrapped all children with DashboardLayout component, so the sidebar, topbar, and layout are now globally applied to every page
2. All Nested Layouts: Simplified all layout files (dashboard, customers, booking, contracts, appointments, settings) to just pass through children without additional wrappers
3. Navigation Structure: Removed duplicate layout nesting that was causing the 404 errors

Now all pages are accessible through the sidebar navigation while maintaining the persistent sidebar, topbar, and layout structure across the entire application. Every route defined in the sidebar will work and display with the proper dashboard layout.