- Month view: Multi-day events render as continuous Google Calendar-style
spanning bars across days/weeks using a greedy lane-packing algorithm.
Timed multi-day events no longer repeat per day.
- Mouse wheel / trackpad scrolls week-by-week in month view, day/week in
other views (debounced, prevents default page scroll).
- datetime-local/date inputs now use color-scheme:dark so the native
browser picker opens in dark mode; calendar icon styled to match.
- Contrast/hour-height selectors redesigned as connected segmented pill
controls instead of individual tiles.
- Hidden calendars list gains proper padding and separator lines.
- "Google Konten" settings panel renamed "Konten" and expanded to show
CalDAV, local calendars, iCal subscriptions, and Google accounts in
one unified panel with sync/disconnect actions.
- New i18n keys added for accounts panel in both de and en.
- Sprachdropdown an den Anfang des Einstellungs-Panels verschoben
- data-i18n für Settings-Header, Speichern-Button und Nav-Tabs ergänzt,
damit diese beim Sprachwechsel sofort übersetzt werden
- setLang() speichert gewählte Sprache in localStorage (bleibt über
Seitenreloads hinweg erhalten); currentLang wird beim Modulstart aus
localStorage initialisiert
- getLang() in openSettingsModal statt state.settings.language, damit
das Dropdown immer die aktive Sprache zeigt
