Enhance Invoice Management with PDF Generation and Improved Filament Resource

[sweep-ai]

This pull request was created by Sweep to resolve the following request by @curtisdelicata:

Description: Develop a system for creating and managing invoices similar to QuickBooks Online.

Tasks:
Create Invoice model and migration.
Develop frontend UI for creating invoices.
Add invoice generation feature with PDF export.
Acceptance Criteria:
Users can create, view, edit, and export invoices.
Invoices are saved in the database and linked to clients.

Continue chatting at https://sweep-chat-demo.vercel.app/c/a7cae493-2c59-4abb-ac9d-fd117b2dbb1f.

Purpose

Improve the invoice management system by adding comprehensive invoice functionality, including automatic invoice number generation, PDF export, and enhanced Filament resource configuration.

Description

This pull request introduces a robust invoice management feature with the following key improvements:

• Created a new migration for the invoices table with comprehensive fields
• Enhanced the Invoice model with advanced functionality
• Developed a PDF generation method for invoices
• Improved the Filament resource for invoice management
• Added a PDF invoice template for professional-looking invoice exports

The changes provide a more complete invoice management solution with automatic invoice numbering, tax calculation, and easy PDF generation. The Filament resource now offers more intuitive form inputs, better filtering, and a download action for invoice PDFs.

Summary

• Added new database migration for invoices table
• Enhanced Invoice model with:
  • Automatic invoice number generation
  • PDF generation method
  • Improved attribute casting
• Updated InvoiceResource with:
  • More comprehensive form fields
  • Improved table columns
  • PDF download action
• Created resources/views/invoices/template.blade.php for invoice PDF template
• Improved validation and user experience for invoice management