fix(map): draw the route line to and from the day's accommodation (#1275)

The map route ran first-activity to last-activity only, while the sidebar
already showed the hotel-to-first-stop and last-stop-to-hotel legs with
their drive times. Feed the day's accommodation bookends into the map
route too, reusing the same getDayBookendHotels lookup and the
"optimize from accommodation" gate, so the drawn line starts and ends at
the hotel, including single-activity and transfer days.

client/src/components/Map/RouteCalculator.test.ts

@@ -6,6 +6,7 @@ import {
   calculateSegments,
   optimizeRoute,
   generateGoogleMapsUrl,
+  withHotelBookends,
 } from './RouteCalculator'
 
 const OSRM_BASE = 'https://router.project-osrm.org/route/v1'
@@ -241,3 +242,46 @@ describe('generateGoogleMapsUrl', () => {
     expect(result).toContain('48.86,2.36')
   })
 })
+
+// ── withHotelBookends (#1275: draw the hotel → first / last → hotel legs) ────────
+
+describe('withHotelBookends', () => {
+  const hotel = { lat: 1, lng: 1 }
+  const a = { lat: 2, lng: 2 }
+  const b = { lat: 3, lng: 3 }
+  const evening = { lat: 4, lng: 4 }
+
+  it('FE-COMP-ROUTECALCULATOR-021: leaves runs untouched when there is no hotel', () => {
+    const runs = [[a, b]]
+    expect(withHotelBookends(runs, a, b, null, null)).toEqual([[a, b]])
+  })
+
+  it('FE-COMP-ROUTECALCULATOR-022: prepends hotel→first and appends last→hotel around the runs', () => {
+    const runs = [[a, b]]
+    expect(withHotelBookends(runs, a, b, hotel, evening)).toEqual([
+      [hotel, a],
+      [a, b],
+      [b, evening],
+    ])
+  })
+
+  it('FE-COMP-ROUTECALCULATOR-023: a single stop with no runs still draws hotel→stop→hotel', () => {
+    expect(withHotelBookends([], a, a, hotel, evening)).toEqual([
+      [hotel, a],
+      [a, evening],
+    ])
+  })
+
+  it('FE-COMP-ROUTECALCULATOR-024: a missing first/last waypoint skips that bookend', () => {
+    const runs = [[a, b]]
+    expect(withHotelBookends(runs, undefined, undefined, hotel, evening)).toEqual([[a, b]])
+  })
+
+  it('FE-COMP-ROUTECALCULATOR-025: only the start hotel adds just the opening leg', () => {
+    const runs = [[a, b]]
+    expect(withHotelBookends(runs, a, b, hotel, null)).toEqual([
+      [hotel, a],
+      [a, b],
+    ])
+  })
+})