feat: optimize routes around accommodation, confirm note deletions (#1123)

Optimize day routes around the accommodation

When a day has an accommodation set, the route optimizer now treats it as
the day's home base: it optimizes a loop that leaves the hotel and returns
to it, so the stop nearest the hotel comes first. On a transfer day -
checking out of one hotel and into another - the route runs from the first
hotel to the second instead.

The optimizer also gained a 2-opt pass on top of the nearest-neighbor
ordering, which removes the crossings the greedy pass used to leave behind.
A new display setting ("optimize route from accommodation", on by default)
lets you turn the anchoring off.

Confirm before deleting notes

Deleting a plan note or a collab note now asks for confirmation first. On
phones and tablets the edit and delete icons sit close together and were
easy to mis-tap, which deleted notes with no way back.

shared/src/i18n/de/dayplan.ts

@@ -9,6 +9,8 @@ const dayplan: TranslationStrings = {
   'dayplan.confirmRemoveTimeBody':
     'Dieser Ort hat eine feste Uhrzeit ({time}). Durch das Verschieben wird die Uhrzeit entfernt und der Ort kann frei sortiert werden.',
   'dayplan.confirmRemoveTimeAction': 'Uhrzeit entfernen & verschieben',
+  'dayplan.confirmDeleteNoteTitle': 'Notiz löschen?',
+  'dayplan.confirmDeleteNoteBody': 'Diese Notiz wird dauerhaft gelöscht.',
   'dayplan.cannotDropOnTimed':
     'Orte können nicht zwischen zeitgebundene Einträge geschoben werden',
   'dayplan.cannotBreakChronology':
@@ -32,6 +34,7 @@ const dayplan: TranslationStrings = {
   'dayplan.toast.needTwoPlaces':
     'Mindestens zwei Orte für Routenoptimierung nötig',
   'dayplan.toast.routeOptimized': 'Route optimiert',
+  'dayplan.toast.routeOptimizedFromHotel': 'Route ab deiner Unterkunft optimiert',
   'dayplan.toast.noGeoPlaces':
     'Keine Orte mit Koordinaten für Routenberechnung gefunden',
   'dayplan.confirmed': 'Bestätigt',