# Features

What the calendar app does, as of the Next.js rewrite (September 2026).

## Public page (`/`)

- Subscribe to the public calendar: Apple Kalender (`webcal://`), Google Kalender (deep link), or
  copy the iCal URL (shows the URL if the clipboard isn't available).
- "Nächste Termine": the next four public events with date, time and place; an event with a web
  link opens it. Refreshed every five minutes; hidden if the API can't be reached.
- Link to the Verwaltung (`/admin`).

## Verwaltung (`/admin`)

Sign-in happens in the admin app (one account for all Nachklang apps). Accounts need the calendar
permission; without it the page says so instead of redirecting.

**List**
- All calendars in one list, grouped by month, colour-coded per calendar.
- Calendar chips toggle calendars on and off, with a count each; Geburtstage is off by default.
- Kommend / Vergangen / Alle. "Vergangen" shows the newest first; "Alle" scrolls to a "Heute" marker.
- Search over title and location.
- Sort by start or by creation date (the latter as a flat list).
- The view is in the URL, so a link reproduces it.
- Drafts show an "Entwurf" badge and a "Veröffentlichen" button, which asks for confirmation and
  says who will see the event.
- Repeating events (birthdays) show a "jährlich" badge and appear at their next occurrence.
- Failed calendars are marked on their chip with a retry banner; the rest of the list stays usable.

**Edit sheet** (bottom sheet on phones, side panel on larger screens)
- Create ("Neuer Termin" in the header, "+" button on phones), edit, duplicate, delete.
- Fields: Kalender, Titel, Ganztägig, Beginn, Ende, Ort, Link, Beschreibung (multi-line), Status
  (Entwurf / Veröffentlicht; "Privat" is kept but not selectable).
- Moving the start moves the end with it. Whole-day events take dates only.
- A link without `https://` is completed; anything that isn't a web address is flagged.
- Moving an event into Geburtstage makes it yearly; moving it out removes that again.
- Errors appear next to their field; a failed save keeps the edits and says why.
- Closing with unsaved changes asks first; so does leaving the page.
- Shows who created and last changed the event.

**Abonnieren** (header)
- Subscription links for every calendar, including the internal ones with their password: Apple,
  Google, or copy. Chor and Geburtstage share a password.

## Not (yet) possible

- Restoring deleted events and editing recurrence need API work first - see
  [api-wishlist.md](api-wishlist.md).
- A month-grid view was deferred (decision Q6); the agenda list came first.