fix: sync unplanned filter with map markers (#385)

The "Unplanned" filter button in PlacesSidebar only filtered the place
list but not the map. Propagate the filter state to TripPlannerPage so
mapPlaces excludes planned places when the filter is active.

client/src/pages/TripPlannerPage.tsx

@@ -210,6 +210,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
   useTripWebSocket(tripId)
 
   const [mapCategoryFilter, setMapCategoryFilter] = useState<string>('')
+  const [mapPlacesFilter, setMapPlacesFilter] = useState<string>('all')
 
   const [expandedDayIds, setExpandedDayIds] = useState<Set<number> | null>(null)
 
@@ -234,13 +235,19 @@ export default function TripPlannerPage(): React.ReactElement | null {
       }
     }
 
+    // Build set of planned place IDs for unplanned filter
+    const plannedIds = mapPlacesFilter === 'unplanned'
+      ? new Set(Object.values(assignments).flatMap(da => da.map(a => a.place?.id).filter(Boolean)))
+      : null
+
     return places.filter(p => {
       if (!p.lat || !p.lng) return false
       if (mapCategoryFilter && String(p.category_id) !== String(mapCategoryFilter)) return false
       if (hiddenPlaceIds.has(p.id)) return false
+      if (plannedIds && plannedIds.has(p.id)) return false
       return true
     })
-  }, [places, mapCategoryFilter, assignments, expandedDayIds])
+  }, [places, mapCategoryFilter, mapPlacesFilter, assignments, expandedDayIds])
 
   const { route, routeSegments, routeInfo, setRoute, setRouteInfo, updateRouteForDay } = useRouteCalculation({ assignments } as any, selectedDayId)
 
@@ -727,6 +734,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
                     onEditPlace={(place) => { setEditingPlace(place); setEditingAssignmentId(null); setShowPlaceForm(true) }}
                     onDeletePlace={(placeId) => handleDeletePlace(placeId)}
                     onCategoryFilterChange={setMapCategoryFilter}
+                    onPlacesFilterChange={setMapPlacesFilter}
                     pushUndo={pushUndo}
                   />
                 </div>
@@ -883,7 +891,7 @@ export default function TripPlannerPage(): React.ReactElement | null {
                   <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} selectedAssignmentId={selectedAssignmentId} onSelectDay={(id) => { handleSelectDay(id); setMobileSidebarOpen(null) }} onPlaceClick={(placeId, assignmentId) => { handlePlaceClick(placeId, assignmentId); setMobileSidebarOpen(null) }} 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); tripActions.setSelectedDay(dayId); setShowReservationModal(true); setMobileSidebarOpen(null) }} onDayDetail={(day) => { setShowDayDetail(day); setSelectedPlaceId(null); setSelectedAssignmentId(null); setMobileSidebarOpen(null) }} accommodations={tripAccommodations} onNavigateToFiles={() => { setMobileSidebarOpen(null); handleTabChange('dateien') }} onExpandedDaysChange={setExpandedDayIds} pushUndo={pushUndo} canUndo={canUndo} lastActionLabel={lastActionLabel} onUndo={handleUndo} />
-                      : <PlacesSidebar tripId={tripId} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} onPlaceClick={(placeId) => { handlePlaceClick(placeId); setMobileSidebarOpen(null) }} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onAssignToDay={handleAssignToDay} onEditPlace={(place) => { setEditingPlace(place); setEditingAssignmentId(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onDeletePlace={(placeId) => handleDeletePlace(placeId)} days={days} isMobile onCategoryFilterChange={setMapCategoryFilter} pushUndo={pushUndo} />
+                      : <PlacesSidebar tripId={tripId} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} onPlaceClick={(placeId) => { handlePlaceClick(placeId); setMobileSidebarOpen(null) }} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onAssignToDay={handleAssignToDay} onEditPlace={(place) => { setEditingPlace(place); setEditingAssignmentId(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onDeletePlace={(placeId) => handleDeletePlace(placeId)} days={days} isMobile onCategoryFilterChange={setMapCategoryFilter} onPlacesFilterChange={setMapPlacesFilter} pushUndo={pushUndo} />
                     }
                   </div>
                 </div>