fix: move paywall sheet to stable scope and fix map button positions

Move .sheet(isPresented: $showPaywall) from subscription section to
top-level body so StoreManager state changes don't dismiss the sheet.
Reposition heart (16pt top/trailing) and map (16pt bottom/trailing,
above gradient) buttons on trip detail map.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

SportsTime/Features/Settings/Views/SettingsView.swift

@@ -76,6 +76,9 @@ struct SettingsView: View {
         } message: {
             Text("This will reset all settings to their default values.")
         }
+        .sheet(isPresented: $showPaywall) {
+            PaywallView(source: "settings")
+        }
         .sheet(isPresented: $showOnboardingPaywall) {
             OnboardingPaywallView(isPresented: $showOnboardingPaywall)
         }
@@ -814,9 +817,6 @@ struct SettingsView: View {
             Text("Subscription")
         }
         .listRowBackground(Theme.cardBackground(colorScheme))
-        .sheet(isPresented: $showPaywall) {
-            PaywallView(source: "settings")
-        }
     }
 
     // MARK: - Helpers

SportsTime/Features/Trip/Views/TripDetailView.swift

@@ -408,11 +408,18 @@ struct TripDetailView: View {
                 }
                 .accessibilityIdentifier("tripDetail.favoriteButton")
                 .accessibilityLabel(isSaved ? "Remove from favorites" : "Save to favorites")
-                .padding(.top, 12)
-                .padding(.trailing, 12)
+                .padding(.top, 16)
+                .padding(.trailing, 16)
             }
-            .overlay(alignment: .bottomTrailing) {
-                // Open in Apple Maps button
+            // Gradient overlay at bottom
+            LinearGradient(
+                colors: [.clear, Theme.cardBackground(colorScheme).opacity(0.8), Theme.cardBackground(colorScheme)],
+                startPoint: .top,
+                endPoint: .bottom
+            )
+            .frame(height: 80)
+
+            // Open in Apple Maps button — above gradient in ZStack
             Button {
                 openInAppleMaps()
             } label: {
@@ -424,19 +431,11 @@ struct TripDetailView: View {
                     .clipShape(Circle())
                     .shadow(color: .black.opacity(0.3), radius: 4, y: 2)
             }
-                .padding(.bottom, 90) // Above the gradient
-                .padding(.trailing, 12)
             .accessibilityLabel("Open in Apple Maps")
             .accessibilityHint("Opens this trip route in Apple Maps")
-            }
-
-            // Gradient overlay at bottom
-            LinearGradient(
-                colors: [.clear, Theme.cardBackground(colorScheme).opacity(0.8), Theme.cardBackground(colorScheme)],
-                startPoint: .top,
-                endPoint: .bottom
-            )
-            .frame(height: 80)
+            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .bottomTrailing)
+            .padding(.bottom, 16)
+            .padding(.trailing, 16)
 
             // Loading indicator
             if isLoadingRoutes {