- Updated `InvoiceService` to accurately reflect the number of line items in `party_count` for invoices.
- Modified weight calculations in the create and update validators to ensure consistent handling of weight types, now using lowercase comparison for "KGS".
- Adjusted invoice data structure in the frontend to include `total_items` and refined logistics handling.
- Improved table rendering in the invoice edit component for better sticky header behavior and item visibility.
These changes aim to improve data integrity and user experience in invoice management.