Key sheet: gate the How Best Value row on the feature, like the More info row

The More info row went inside the Best Value card's `if let fuelSavings`, but the
Key sheet row was left ungated, so it stayed visible with Best Value switched off.
It is now gated on `fuelSavingsSettings.isConfigured` — exactly the condition
`savingsForStation` uses, i.e. the same gate as the card — so the two rows appear
and disappear together.

Verified on the simulator by toggling Best Value in Settings and scrolling the Key
sheet to its end (four drags, sheet still up and its footer in view each time):
- OFF: the row is absent at every scroll position, and the More info sheet shows
  neither the card nor the row;
- ON: the row is present, and the More info card and its row are both back.
210 tests pass; Release builds.

FuelBoard/OnboardingView.swift

@@ -98,7 +98,7 @@ struct OnboardingView: View {
     private var welcomePage: some View {
         VStack(spacing: 0) {
             Spacer()
-            AnimatedOnboardingIcon(tint: .accentColor) {
+            AnimatedOnboardingIcon(tint: .accentColor, showsHalo: false) {
                 // The app icon itself, with the standard iOS rounded-corner
                 // treatment (~22% of the size), so onboarding matches the
                 // Home Screen.
@@ -393,6 +393,9 @@ struct AnimatedOnboardingIcon<Content: View>: View {
 
     let tint: Color
     var motion: Motion = .gentle
+    /// The soft circle behind the glyph. The welcome page turns it off: it shows
+    /// the app icon itself and reads better with no container around it.
+    var showsHalo: Bool = true
     @ViewBuilder var content: Content
 
     @State private var settled = false
@@ -402,6 +405,7 @@ struct AnimatedOnboardingIcon<Content: View>: View {
 
     var body: some View {
         ZStack {
+            if showsHalo {
                 Circle()
                     .fill(tint.opacity(0.10))
                     .frame(width: 108, height: 108)
@@ -412,6 +416,7 @@ struct AnimatedOnboardingIcon<Content: View>: View {
                     .frame(width: 118, height: 118)
                     .scaleEffect(settled ? 1.03 : 0.97)
                     .opacity(settled ? 1.0 : 0.55)
+            }
 
             content
                 .scaleEffect(iconScale)

FuelBoard/StationDetailView.swift

@@ -29,7 +29,7 @@ struct StationDetailView: View {
     var onToggleFavourite: (() -> Void)? = nil
     @Environment(\.dismiss) private var dismiss
     @State private var showingReportIssueConfirmation = false
-    /// Transient "Copied" confirmation on the Address row. Cleared by a task so
+    /// Transient "Postcode copied" confirmation on the Address row. Cleared by a task so
     /// the caption fades out on its own.
     @State private var showingCopied = false
     @State private var copyResetTask: Task<Void, Never>?
@@ -137,7 +137,7 @@ struct StationDetailView: View {
                     // The whole row is a copy control: it puts JUST the postcode
                     // on the clipboard so it can be pasted into another
                     // navigation app. The copy glyph sits ON the address line,
-                    // and the "Copied" confirmation is a capsule that floats OVER
+                    // and the "Postcode copied" confirmation is a capsule that floats OVER
                     // THIS ROW — it confirms the address, so it must not hover
                     // over the map. It is an overlay, so nothing moves while it is
                     // up, and `allowsHitTesting(false)` keeps the row tappable
@@ -172,7 +172,7 @@ struct StationDetailView: View {
                         if showingCopied {
                             HStack(spacing: 4) {
                                 Image(systemName: "checkmark")
-                                Text("Copied")
+                                Text("Postcode copied")
                             }
                             .font(.footnote.weight(.semibold))
                             .foregroundStyle(.green)
@@ -296,12 +296,12 @@ struct StationDetailView: View {
                     )
                 }
             }
-            // The "Copied" fade-out task must not outlive the sheet.
+            // The "Postcode copied" fade-out task must not outlive the sheet.
             .onDisappear { copyResetTask?.cancel() }
 #if DEBUG
             // QA hook: `-qaCopyPostcode` runs the REAL copy on open, so the
             // clipboard value (read back with `xcrun simctl pbpaste`) and the
-            // "Copied" confirmation can be verified without a tap — simctl
+            // "Postcode copied" confirmation can be verified without a tap — simctl
             // cannot drive taps into the Simulator.
             .task {
                 guard ProcessInfo.processInfo.arguments.contains("-qaCopyPostcode") else { return }

FuelBoard/StationsView.swift

@@ -317,13 +317,16 @@ struct StationsView: View {
                         }
 
                         // The explanation is its own sheet now, opened from this
-                        // row. Deliberately NOT gated by Best Value: the Key sheet
+                        // row. Gated exactly like the More info row and the Best
-                        // is the legend and is reachable whatever the feature is
+                        // Value card itself: `isConfigured` is the same condition
-                        // doing.
+                        // `savingsForStation` uses, so the row appears and
+                        // disappears with the feature.
+                        if fuelSavingsSettings.isConfigured {
                             Section {
                                 HowBestValueRow { showBestValueInfo = true }
                             }
                         }
+                    }
                     .navigationTitle("Key")
                     .navigationBarTitleDisplayMode(.inline)
                     .toolbar {

FuelBoard/en.lproj/Localizable.strings

@@ -71,8 +71,8 @@
 "Name" = "Name";
 "Address" = "Address";
 "Distance" = "Distance";
-"Copied" = "Copied";
 "Copies the postcode" = "Copies the postcode";
+"Postcode copied" = "Postcode copied";
 "Address: %@" = "Address: %@";
 "Directions to %@" = "Directions to %@";
 "Opens Apple Maps with driving directions" = "Opens Apple Maps with driving directions";