test(share): the map test's page hook knows the folded days and the map's day pick

The redesigned share page reads collapsedDays, toggleDay and pickDayOnMap
from its hook; the map test's stand-in left them out and every case there
failed on the missing set.

client/tests/unit/pages/SharedTripPage.map.test.tsx

@@ -74,6 +74,9 @@ function hookState(data: unknown) {
     convert: (n: number) => n,
     selectedDay: null,
     setSelectedDay: vi.fn(),
+    pickDayOnMap: vi.fn(),
+    collapsedDays: new Set<number>(),
+    toggleDay: vi.fn(),
     activeTab: 'plan',
     setActiveTab: vi.fn(),
     showLangPicker: false,