Let me also check the remaining components to understand the full modal patterns:

Now I have full context of the entire POS system. I'll build a comprehensive inventory report generator modal that reuses the existing product data and follows the same modal pattern. It will include: inventory summary by category, stock alerts, valuation reports, low-stock items, exportable data, and filterable views.

Now I need to wire the inventory report into the main page and add a trigger button. I'll add it to the POS header:

Now wire the modal into page.tsx:

The inventory report generator is now fully integrated into the POS system. It opens via the green "Inventory" button in the top header bar and includes four tabbed views: Overview with summary cards and expandable category breakdowns with value bars, Stock Alerts showing out-of-stock and low-stock items with color-coded severity, Valuation with a detailed category breakdown table, percentage-share bars, and a top-5 highest value items list, and Full List with a sortable/filterable data table supporting search, category filter, and stock-status filter. The report also supports Export CSV to download the full inventory data and Print to generate a formatted printable report.

Let me read the rest of the pasted text and understand the current codebase structure:

Now let me also read the remaining components to fully understand what's there:

Now I have full context of the entire system. The user wants me to replace the small product-category sidebar with a full ERP-style navigation sidebar matching the HTML template they provided. This is a major layout change -- the POS needs a collapsible main nav sidebar on the far left, and the category sidebar becomes part of the product area. Let me restructure the entire layout.

Now I need to create placeholder page components for the non-POS pages, and restructure page.tsx to handle routing between pages:

Now let me restructure page.tsx to include the main sidebar and handle page routing:

Now let me add the custom scrollbar style to globals.css so the sidebar scrolls nicely:

I've added a full ERP-style collapsible main navigation sidebar to the POS system, matching the structure from your HTML template. The sidebar includes all 15 navigation sections: Dashboard, Point of Sale, Customers, Inventory (with sub-items for Products, Categories, Brands, Stocks/IMEIs, Stock Transfer), Finance (Expenses, Pricing), Barcode Generator, Branches, Purchasing (Vendors, Quick Onboarding with "New" badge, Purchase Orders), Repair Service, Human Resource (Employees, Attendance, Payrolls), Reports (Sales, Stock, Profit & Loss, Expenses), User Management (Users, Roles, Privileges), System Settings (App Settings, Printers), and Purge Cache. Each non-POS page shows a contextual dashboard with relevant stats, quick actions, and a placeholder for backend connection, while the POS page retains the full terminal with category sidebar, product grid, and cart panel.