Introduce a complete workflow for managing shipment-related documents
and mandatory commitment forms between the Laravel backend and
WordPress frontend.
- Laravel:
- Add `ShipmentCommitmentForm` model and migration to track signed
forms per shipment.
- Implement `CommitmentFormController` to handle fetching available
forms and uploading signed documents.
- Add PDF download endpoints for AWB, labels, and invoices via
`ShipmentPdfController`.
- Extend `User` model with notification management methods.
- Add `FinanceOverviewWidget` for Filament dashboard.
- WordPress:
- Implement AJAX handlers in `user-bridge.php` for PDF downloads and
commitment form management.
- Update `shortcodes.php` to display document download grid and
dynamic commitment form upload interface in order details.
- Add styling for document buttons and form status indicators in
`ifnex-orders.css`.
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