- Added QUICK_START_PDF_EXPORT.md for user guidance on PDF export features.
- Developed Web/pdf_audit_export.py for generating DIN 5008 compliant PDFs.
- Enhanced Web/app.py with new routes for quick and official PDF exports.
- Updated Web/templates/admin_audit.html to include new PDF export buttons.
- Created verify_pdf_export_setup.py to verify installation and configuration of the PDF export system.
- Updated background colors across various templates to use CSS variables for better theming support.
- Replaced hardcoded colors with variables like `var(--ui-surface)` and `var(--ui-surface-soft)` for backgrounds.
- Adjusted text colors to use `var(--ui-text)` for improved readability and consistency.
- Enhanced the theme toggle functionality in the base template to dynamically change theme colors based on user preference.
- Ensured that all relevant templates reflect the new theming approach for a cohesive user experience.
- Introduced a new audit logging system that creates a tamper-evident chain of events in MongoDB.
- Added functions for appending audit events, ensuring index integrity, and verifying the audit chain.
- Implemented soft-delete functionality for inventory and borrowing records to comply with GoBD regulations.
- Added UI components for displaying invoice corrections and audit dashboard, including mismatch reporting.
- Created a CLI utility for verifying the integrity of the audit chain.
- Enhanced invoice management by preventing overwrites and allowing correction entries with reasons and optional deltas.
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