[FEATURE] - Cutom Header & Footer

[krisgopal128]

Feature Summary

Add customizable headers and footers to the invoice format to allow users to include branding elements, legal disclaimers, or additional notes.

Use Case

Reflect each company unique branding (e.g., company logo, contact information) and comply with legal or tax regulations
Allow users to add text or images (e.g., legal disclaimers, signatures, or promotional content)

Proposed Solution

• include company logo or tagline in the header
• include company website, contact address or tagline in the footer

Additional Information

Ensure compatibility with existing invoice templates.
Provide preview functionality for users to see how their customizations will look before saving.
Optionally allow different headers/footers for various invoice types (e.g., pro forma, final, or recurring invoices).
Ensure all designs are responsive for digital and print-friendly versions of invoices.