Improve UI consistency and add heart save button

- Add themed background to all tab views (Schedule, Settings, My Trips)
- Remove navigation titles from all screens (tab bar provides context)
- Add empty state to My Trips view
- Remove max driving hours slider from trip planner (available in Settings)
- Replace save menu with heart button overlay on trip detail map
- Add ability to unsave trips by tapping heart again

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SportsTime/Features/Trip/Views/TripDetailView.swift

@@ -21,7 +21,6 @@ struct TripDetailView: View {
     @State private var shareURL: URL?
     @State private var mapCameraPosition: MapCameraPosition = .automatic
     @State private var isSaved = false
-    @State private var showSaveConfirmation = false
     @State private var routePolylines: [MKPolyline] = []
     @State private var isLoadingRoutes = false
 
@@ -57,8 +56,6 @@ struct TripDetailView: View {
             }
         }
         .background(Theme.backgroundGradient(colorScheme))
-        .navigationTitle(trip.name)
-        .navigationBarTitleDisplayMode(.inline)
         .toolbarBackground(Theme.cardBackground(colorScheme), for: .navigationBar)
         .toolbar {
             ToolbarItemGroup(placement: .primaryAction) {
@@ -71,23 +68,12 @@ struct TripDetailView: View {
                         .foregroundStyle(Theme.warmOrange)
                 }
 
-                Menu {
-                    Button {
-                        Task {
-                            await exportPDF()
-                        }
-                    } label: {
-                        Label("Export PDF", systemImage: "doc.fill")
+                Button {
+                    Task {
+                        await exportPDF()
                     }
-
-                    Button {
-                        saveTrip()
-                    } label: {
-                        Label(isSaved ? "Saved" : "Save Trip", systemImage: isSaved ? "bookmark.fill" : "bookmark")
-                    }
-                    .disabled(isSaved)
                 } label: {
-                    Image(systemName: "ellipsis.circle")
+                    Image(systemName: "doc.fill")
                         .foregroundStyle(Theme.warmOrange)
                 }
             }
@@ -104,11 +90,6 @@ struct TripDetailView: View {
                 ShareSheet(items: [trip.name, trip.formattedDateRange])
             }
         }
-        .alert("Trip Saved", isPresented: $showSaveConfirmation) {
-            Button("OK", role: .cancel) { }
-        } message: {
-            Text("Your trip has been saved and can be accessed from My Trips.")
-        }
         .onAppear {
             checkIfSaved()
         }
@@ -132,6 +113,22 @@ struct TripDetailView: View {
                 }
             }
             .mapStyle(colorScheme == .dark ? .standard(elevation: .flat, emphasis: .muted) : .standard)
+            .overlay(alignment: .topTrailing) {
+                // Save/Unsave heart button
+                Button {
+                    toggleSaved()
+                } label: {
+                    Image(systemName: isSaved ? "heart.fill" : "heart")
+                        .font(.system(size: 22, weight: .medium))
+                        .foregroundStyle(isSaved ? .red : .white)
+                        .padding(12)
+                        .background(.ultraThinMaterial)
+                        .clipShape(Circle())
+                        .shadow(color: .black.opacity(0.2), radius: 4, y: 2)
+                }
+                .padding(.top, 12)
+                .padding(.trailing, 12)
+            }
 
             // Gradient overlay at bottom
             LinearGradient(
@@ -449,6 +446,14 @@ struct TripDetailView: View {
         showShareSheet = true
     }
 
+    private func toggleSaved() {
+        if isSaved {
+            unsaveTrip()
+        } else {
+            saveTrip()
+        }
+    }
+
     private func saveTrip() {
         guard let savedTrip = SavedTrip.from(trip, games: games, status: .planned) else {
             print("Failed to create SavedTrip")
@@ -459,13 +464,34 @@ struct TripDetailView: View {
 
         do {
             try modelContext.save()
-            isSaved = true
-            showSaveConfirmation = true
+            withAnimation(.spring(response: 0.3, dampingFraction: 0.6)) {
+                isSaved = true
+            }
         } catch {
             print("Failed to save trip: \(error)")
         }
     }
 
+    private func unsaveTrip() {
+        let tripId = trip.id
+        let descriptor = FetchDescriptor<SavedTrip>(
+            predicate: #Predicate { $0.id == tripId }
+        )
+
+        do {
+            let savedTrips = try modelContext.fetch(descriptor)
+            for savedTrip in savedTrips {
+                modelContext.delete(savedTrip)
+            }
+            try modelContext.save()
+            withAnimation(.spring(response: 0.3, dampingFraction: 0.6)) {
+                isSaved = false
+            }
+        } catch {
+            print("Failed to unsave trip: \(error)")
+        }
+    }
+
     private func checkIfSaved() {
         let tripId = trip.id
         let descriptor = FetchDescriptor<SavedTrip>(