fix(share): a stop's stay comes from its time window, not the one-hour place default

The public page showed places.duration_minutes under every stop, and that is
60 on every place nobody set a road-trip stay for, so a shared plan read "1 h"
everywhere. The stay is now the stop's start to end time, per visit, past
midnight included, and a stop without an end shows none.

Closes #2676

client/src/pages/SharedTripPage.test.tsx

@@ -1586,8 +1586,9 @@ describe('SharedTripPage', () => {
           id: 301, day_id: 21, order_index: 0, notes: 'go early, before the coaches',
           place: {
             id: 501, name: 'Louvre', description: 'The big one', address: 'Rue de Rivoli, Paris',
-            lat: 48.86, lng: 2.34, category_id: null, price: null, place_time: '09:00', end_time: null,
-            duration_minutes: 150, notes: 'Skip the pyramid queue', website: 'https://louvre.fr',
+            // The stay comes from the window; the place default of an hour is not a plan (#2676).
+            lat: 48.86, lng: 2.34, category_id: null, price: null, place_time: '09:00', end_time: '11:30',
+            duration_minutes: 60, notes: 'Skip the pyramid queue', website: 'https://louvre.fr',
             phone: '+33 1 40 20 50 50', image_url: null, transport_mode: 'walking', category: null, tags: [],
           },
         },
@@ -1639,6 +1640,23 @@ describe('SharedTripPage', () => {
       expect(document.querySelector('a[href^="javascript:"]')).toBeNull();
       expect(screen.queryByText(/min$/)).toBeNull();
     });
+
+    it('shows no stay for a stop with only a start, whatever the place default says (#2676)', async () => {
+      const startOnly = {
+        21: [{
+          id: 303, day_id: 21, order_index: 0, notes: null,
+          place: {
+            id: 503, name: 'Café', description: null, address: 'Somewhere 1', lat: null, lng: null,
+            duration_minutes: 60, notes: null, website: null, phone: null,
+            category_id: null, price: null, place_time: '15:00', end_time: null, image_url: null,
+            transport_mode: 'walking', category: null, tags: [],
+          },
+        }],
+      };
+      await open('start-only-token', payload({ days, assignments: startOnly }));
+      await waitFor(() => expect(screen.getByText('Somewhere 1')).toBeInTheDocument());
+      expect(screen.queryByText('1 h')).toBeNull();
+    });
   });
 
   describe('FE-PAGE-SHARED-039: a booking shows its note and its link, and nothing that is not http(s) (#2320)', () => {

client/src/pages/sharedTrip/SharedPlaceDetails.tsx

@@ -4,7 +4,7 @@ import { fs } from '../../components/shared/DialogShell'
 import { Tooltip } from '../../components/shared/Tooltip'
 import { WhiteBadge } from '../../components/Planner/planParts'
 import { getGoogleMapsUrlForPlace } from '../../components/Planner/placeGoogleMaps'
-import { formatDurationMinutes, isHttpUrl } from './sharedTripModel'
+import { formatDurationMinutes, isHttpUrl, plannedStayMinutes } from './sharedTripModel'
 
 /**
  * The read-only detail of one stop on a shared plan (#2320).
@@ -14,7 +14,8 @@ import { formatDurationMinutes, isHttpUrl } from './sharedTripModel'
  * usually also left a note on the place and another on the day it was
  * planned for, and a link would show none of that. This shows what the owner
  * chose to share, laid out the way the planner lays it out: address, then
- * description, then the two notes, then how long they meant to stay, then
+ * description, then the two notes, then how long they meant to stay (from the
+ * stop's start and end time), then
  * the ways to reach the place.
  *
  * Nothing here is editable and nothing here is a route into the app: every
@@ -46,7 +47,7 @@ export function SharedPlaceDetails({ place, assignmentNotes }: { place: SharedPl
     name: place.name, address: place.address ?? null, lat: place.lat ?? null, lng: place.lng ?? null,
     google_place_id: null, google_ftid: null,
   })
-  const duration = formatDurationMinutes(place.duration_minutes)
+  const duration = formatDurationMinutes(plannedStayMinutes(place.place_time, place.end_time))
   const dayNote = assignmentNotes?.trim() || null
   const placeNote = place.notes?.trim() || null
   const hasLinks = !!(website || phone || mapsUrl)

client/src/pages/sharedTrip/sharedTripModel.test.ts

@@ -1,7 +1,7 @@
 import { describe, it, expect } from 'vitest'
 import { AxiosError, AxiosHeaders } from 'axios'
 import {
-  coverSrc, dayHasEntries, formatDateRange, formatDurationMinutes, groupInOrder, isHttpUrl, isSharedTripPayload, legFacts, linkHost,
+  coverSrc, dayHasEntries, formatDateRange, formatDurationMinutes, groupInOrder, isHttpUrl, isSharedTripPayload, legFacts, linkHost, plannedStayMinutes,
   sharedTripLoadError, spanLabelKey, stopNumbers, transportFacts, unplannedPlaces,
 } from './sharedTripModel'
 
@@ -25,6 +25,15 @@ describe('sharedTripModel (#2320)', () => {
     expect(formatDurationMinutes(89.6)).toBe('1 h 30 min')
   })
 
+  it('reads the planned stay off the time window, never off the place default (#2676)', () => {
+    expect(plannedStayMinutes('10:00', '12:30')).toBe(150)
+    expect(plannedStayMinutes('22:30', '01:00')).toBe(150)
+    expect(plannedStayMinutes('10:00', null)).toBeNull()
+    expect(plannedStayMinutes(null, '12:00')).toBeNull()
+    expect(plannedStayMinutes('10:00', '10:00')).toBeNull()
+    expect(plannedStayMinutes(undefined, undefined)).toBeNull()
+  })
+
   it('writes nothing for a missing, zero or nonsense figure', () => {
     expect(formatDurationMinutes(null)).toBeNull()
     expect(formatDurationMinutes(undefined)).toBeNull()

client/src/pages/sharedTrip/sharedTripModel.ts

@@ -3,6 +3,7 @@
  * page and its detail blocks can share them and a test can drive them
  * without rendering.
  */
+import { parseTimeToMinutes } from '../../utils/dayMerge'
 
 /**
  * Whether a string is a link the page may render as one.
@@ -22,6 +23,22 @@ export function isHttpUrl(value: unknown): value is string {
   }
 }
 
+/**
+ * How long the owner planned to stay, read off the stop's time window.
+ *
+ * Not `places.duration_minutes`: every place carries one, 60 unless someone
+ * set a road-trip stay, so a link showed "1 h" under every stop (#2676). The
+ * window is what the owner actually planned, and it can differ per visit.
+ * Without an end there is no stay to show. An end before the start runs past
+ * midnight.
+ */
+export function plannedStayMinutes(start: string | null | undefined, end: string | null | undefined): number | null {
+  const from = parseTimeToMinutes(start)
+  const to = parseTimeToMinutes(end)
+  if (from == null || to == null || from === to) return null
+  return to > from ? to - from : to + 24 * 60 - from
+}
+
 /**
  * "45 min", "2 h", "1 h 30 min" — the planned time at a place.
  *