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/settings.ts

@@ -65,6 +65,9 @@ const settings: TranslationStrings = {
   'settings.bookingLabelsHint':
     'Zeigt Bahnhofs-/Flughafennamen auf der Karte. Wenn aus, wird nur das Icon angezeigt.',
   'settings.blurBookingCodes': 'Buchungscodes verbergen',
+  'settings.optimizeFromAccommodation': 'Route ab der Unterkunft optimieren',
+  'settings.optimizeFromAccommodationHint':
+    'Beim Optimieren eines Tages startet die Route an der Unterkunft, in der du aufwachst, und endet an der, in die du am Abend eincheckst.',
   'settings.notifications': 'Mitteilungen',
   'settings.notifyTripInvite': 'Trip-Einladungen',
   'settings.notifyBookingChange': 'Buchungsänderungen',