Added
- Calendar: overlapping timed events in week and day views now render side-by-side using a column-layout algorithm instead of stacking on top of each other
- Calendar: events support optional file attachments (images, PDFs, and office documents up to 5 MB); images are shown inline in the event popup, other files as a download link
- Birthdays: redesigned edit modal with photo avatar and name/date fields displayed side by side
Fixed
- Calendar: attachment i18n keys are fully translated in all 15 locales (German translation added; Portuguese diacritics corrected)