Add a native title tooltip to calendar day cells so hovering over a
public holiday reveals its name (and custom label if configured).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Remove 12 hardcoded arrays for weekdays/months across 6 languages.
Use Intl.DateTimeFormat for month names and i18n keys for weekdays.
Works for all locales automatically.
Thanks @slashwarm for the original PR!
Users can now select which days are weekends (default: Sat+Sun).
Useful for countries like Bangladesh (Fri+Sat) or others with
different work weeks. Settings appear under "Block weekends" toggle.
Add Arabic to the client i18n system, expose it in the language selectors, and enable RTL document handling. Also localize the remaining language-specific UI bits used by the login, demo, Vacay, and GitHub panels.
Cod3d1PA