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/ko/settings.ts

@@ -65,6 +65,9 @@ const settings: TranslationStrings = {
   'settings.bookingLabelsHint':
     '지도에 역 / 공항 이름을 표시합니다. 끄면 아이콘만 표시됩니다.',
   'settings.blurBookingCodes': '예약 코드 흐리게',
+  'settings.optimizeFromAccommodation': '숙소 기준으로 경로 최적화',
+  'settings.optimizeFromAccommodationHint':
+    '하루 일정을 최적화할 때, 아침에 머무는 숙소에서 경로를 시작하고 그날 저녁에 체크인하는 숙소에서 경로를 끝냅니다.',
   'settings.notifications': '알림',
   'settings.notifyTripInvite': '여행 초대',
   'settings.notifyBookingChange': '예약 변경',