- Added secondary FAB button 'Печать' with printer icon (window.print)
- Created printer.svg icon for the print button
- Added .fab-secondary__ico--print CSS class
- Fixed html2pdf color-mix() issue: buildCleanClone() creates a deep clone
with all computed styles inlined, all stylesheets removed, and
pseudo-elements converted to real DOM elements before passing to html2pdf
- Two separate handlers: pdfBtn for download, printBtn for print dialog