- Add ReportLab template renderer with JSON-based template system
- Implement template schema validation and helper functions
- Add database migration for template_json columns
- Update visual editor to generate ReportLab JSON alongside HTML/CSS
- Maintain backward compatibility with legacy templates
- Add comprehensive migration documentation
BREAKING CHANGE: Existing PDF templates need to be saved again through
the visual editor to generate the new template_json format. Templates
will continue to work using the legacy fallback generator until saved.
Dries Peeters