Show only populated place filters

lib/screens/mapflow_shell.dart

@@ -53,7 +53,11 @@ class _MapContent extends ConsumerWidget {
     final selected = state.selectedPlace;
     final userCoordinate = state.userCoordinate;
     final mapCenter = userCoordinate ?? selected?.coordinate ?? _fallbackCenter;
-    final availableTraits = PlaceTrait.values;
+    final traitCounts = _countPlaceTraits(state.places);
+    final availableTraits = [
+      for (final trait in PlaceTrait.values)
+        if ((traitCounts[trait] ?? 0) > 0) trait,
+    ];
 
     return Scaffold(
       body: Stack(
@@ -126,10 +130,12 @@ class _MapContent extends ConsumerWidget {
               child: Column(
                 mainAxisSize: MainAxisSize.min,
                 children: [
-                  _TraitBar(
-                    selectedTrait: state.selectedTrait,
-                    traits: availableTraits,
-                  ),
+                  if (availableTraits.isNotEmpty)
+                    _TraitBar(
+                      selectedTrait: state.selectedTrait,
+                      traits: availableTraits,
+                      traitCounts: traitCounts,
+                    ),
                   _PlaceCarousel(
                     places: state.recommendations,
                     onSelect: (place) => ref
@@ -173,6 +179,16 @@ class _MapContent extends ConsumerWidget {
   }
 }
 
+Map<PlaceTrait, int> _countPlaceTraits(List<PlaceRecommendation> places) {
+  final counts = <PlaceTrait, int>{};
+  for (final place in places) {
+    for (final trait in place.traits) {
+      counts[trait] = (counts[trait] ?? 0) + 1;
+    }
+  }
+  return counts;
+}
+
 class _UserLocationMarker extends StatelessWidget {
   const _UserLocationMarker();
 
@@ -520,10 +536,15 @@ class _MapAttribution extends StatelessWidget {
 }
 
 class _TraitBar extends ConsumerWidget {
-  const _TraitBar({required this.selectedTrait, required this.traits});
+  const _TraitBar({
+    required this.selectedTrait,
+    required this.traits,
+    required this.traitCounts,
+  });
 
   final PlaceTrait? selectedTrait;
   final List<PlaceTrait> traits;
+  final Map<PlaceTrait, int> traitCounts;
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
@@ -541,7 +562,7 @@ class _TraitBar extends ConsumerWidget {
           final selected = item == selectedTrait;
           return ChoiceChip(
             avatar: Icon(item.icon, size: 17),
-            label: Text(item.label),
+            label: Text('${item.label} ${traitCounts[item] ?? 0}'),
             selected: selected,
             onSelected: (_) => selected
                 ? controller.clearTrait()