AssetManager 0.5.5.37

Privacy report and category user interface

Fixed the privacy Excel export by returning validated complete XLSX bytes.
Added protection against invalid control characters and oversized Excel cell content.
Added localized worksheet names and column headings.
Added a standalone HTML privacy report export.
Replaced the expanded category cards with worksheet-style tabs.
Categories can still be added, renamed and removed without changing the stored data model.
Automatic deletion remains disabled in privacy phase 1.