diff --git a/client/src/components/Planner/DayPlanSidebar.jsx b/client/src/components/Planner/DayPlanSidebar.jsx
index f23839c..cc671e8 100644
--- a/client/src/components/Planner/DayPlanSidebar.jsx
+++ b/client/src/components/Planner/DayPlanSidebar.jsx
@@ -444,7 +444,7 @@ export default function DayPlanSidebar({
             <div key={day.id} style={{ borderBottom: '1px solid var(--border-faint)' }}>
               {/* Tages-Header — akzeptiert Drops aus der PlacesSidebar */}
               <div
-                onClick={() => { onSelectDay(isSelected ? null : day.id); if (onDayDetail) onDayDetail(isSelected ? null : day) }}
+                onClick={() => { onSelectDay(day.id); if (onDayDetail) onDayDetail(day) }}
                 onDragOver={e => { e.preventDefault(); setDragOverDayId(day.id) }}
                 onDragLeave={e => { if (!e.currentTarget.contains(e.relatedTarget)) setDragOverDayId(null) }}
                 onDrop={e => handleDropOnDay(e, day.id)}
diff --git a/client/src/pages/TripPlannerPage.jsx b/client/src/pages/TripPlannerPage.jsx
index 8777dee..c397c8b 100644
--- a/client/src/pages/TripPlannerPage.jsx
+++ b/client/src/pages/TripPlannerPage.jsx
@@ -580,7 +580,7 @@ export default function TripPlannerPage() {
                   </div>
                   <div style={{ flex: 1, overflow: 'auto' }}>
                     {mobileSidebarOpen === 'left'
-                      ? <DayPlanSidebar tripId={tripId} trip={trip} days={days} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} onSelectDay={(id) => { handleSelectDay(id); setMobileSidebarOpen(null) }} onPlaceClick={handlePlaceClick} onReorder={handleReorder} onUpdateDayTitle={handleUpdateDayTitle} onAssignToDay={handleAssignToDay} onRouteCalculated={(r) => { if (r) { setRoute(r.coordinates); setRouteInfo({ distance: r.distanceText, duration: r.durationText }) } }} reservations={reservations} onAddReservation={(dayId) => { setEditingReservation(null); tripStore.setSelectedDay(dayId); setShowReservationModal(true); setMobileSidebarOpen(null) }} />
+                      ? <DayPlanSidebar tripId={tripId} trip={trip} days={days} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} selectedAssignmentId={selectedAssignmentId} onSelectDay={(id) => { handleSelectDay(id); setMobileSidebarOpen(null) }} onPlaceClick={handlePlaceClick} onReorder={handleReorder} onUpdateDayTitle={handleUpdateDayTitle} onAssignToDay={handleAssignToDay} onRouteCalculated={(r) => { if (r) { setRoute(r.coordinates); setRouteInfo({ distance: r.distanceText, duration: r.durationText }) } }} reservations={reservations} onAddReservation={(dayId) => { setEditingReservation(null); tripStore.setSelectedDay(dayId); setShowReservationModal(true); setMobileSidebarOpen(null) }} onDayDetail={(day) => { setShowDayDetail(day); setSelectedPlaceId(null); setSelectedAssignmentId(null); setMobileSidebarOpen(null) }} accommodations={tripAccommodations} />
                       : <PlacesSidebar places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} onPlaceClick={handlePlaceClick} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onAssignToDay={handleAssignToDay} days={days} isMobile />
                     }
                   </div>