Add changelog entries for versions 0.2.5 through 0.3.7. Update FR/EN
user guide with profiles, transaction splits, drag-and-drop categories,
dark mode, SVG chart patterns, and context menus. Add Profiles section
to in-app docs page.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add DocsPage with full user guide content, TOC sidebar with scroll spy,
and a print button that opens the OS print dialog for PDF export.
Print styles hide sidebars and remove layout constraints for clean output.
Link to user guide added on Settings page.
Bump version to 0.2.12.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
