onboarding: persist completed flag keychain-first so it doesn't re-show

The completed flag lived only in app-group UserDefaults
(UserDefaults(suiteName: appGroupSuite)). On free SideStore accounts the
app-group container isn't provisioned, so the suite read as nil: save was a
silent no-op and load always returned false -> onboarding re-appeared on
every launch even after finishing and granting all permissions.

Switch to saveString/loadString (keychain-first, app-group mirror) under
onboardingCompletedKey, matching favourites/distance-unit persistence which
survives reinstall and works without a provisioning group. loadString falls
back to the app-group mirror, so anyone who previously completed on a
provisioned group keeps their flag; users on unprovisioned groups complete
once more and then it sticks.

FuelBoard/FuelBoardApp.swift

@@ -1,7 +1,22 @@
+import ActivityKit
 import SwiftUI
 
 @main
 struct FuelBoardApp: App {
+    init() {
+        #if DEBUG
+        // QA hook (Debug builds only): `-qaLiveActivity e10|e5|diesel` starts a
+        // Live Activity with a long station name so the Lock Screen / island
+        // layout can be rendered in the Simulator for visual QA.
+        let args = ProcessInfo.processInfo.arguments
+        if let idx = args.firstIndex(of: "-qaLiveActivity"),
+           args.indices.contains(idx + 1),
+           let fuel = FuelType(rawValue: args[idx + 1]) {
+            startQALiveActivity(fuel: fuel)
+        }
+        #endif
+    }
+
     var body: some Scene {
         WindowGroup {
             ContentView()
@@ -9,6 +24,34 @@ struct FuelBoardApp: App {
         }
     }
 
+    #if DEBUG
+    private func startQALiveActivity(fuel: FuelType) {
+        let state = FuelBoardLiveActivityAttributes.ContentState(
+            fuel: fuel,
+            stationID: "qa-phoenix",
+            stationName: "Phoenix Filling Stations",
+            brand: "Phoenix",
+            pricePence: 1499,
+            priceDisplayStyle: FuelStore.loadPriceDisplayStyle(),
+            distanceKM: 8.0,
+            lat: 51.5,
+            lng: -0.12,
+            updatedAt: Date()
+        )
+        let attrs = FuelBoardLiveActivityAttributes()
+        do {
+            let activity = try Activity.request(
+                attributes: attrs,
+                content: .init(state: state, staleDate: nil),
+                pushType: nil
+            )
+            print("QA-LIVE-ACTIVITY STARTED id=\(activity.id)")
+        } catch {
+            print("QA-LIVE-ACTIVITY FAILED: \(error)")
+        }
+    }
+    #endif
+
     /// Handles deep links that end up in the app. Widget taps arrive here in
     /// two cases:
     ///   - legacy/cached widget timelines using the `fuelboard://` relay, or

FuelBoard/StationsView.swift

@@ -317,17 +317,6 @@ extension FuelType {
         case .diesel: return "Diesel"
         }
     }
-
-    /// Fuel colour wheel (user-chosen palette): green = unleaded (#30D158),
-    /// yellow = premium (#FFD60A), cyan = diesel (#64D2FF). Used for the
-    /// fuel-type tab icons and the title icon.
-    var tintColor: Color {
-        switch self {
-        case .e10: return Color(red: 48/255.0, green: 209/255.0, blue: 88/255.0)      // #30D158
-        case .e5: return Color(red: 255/255.0, green: 214/255.0, blue: 10/255.0)      // #FFD60A
-        case .diesel: return Color(red: 100/255.0, green: 210/255.0, blue: 255/255.0) // #64D2FF
-        }
-    }
 }
 
 /// Fuel-type selector styled like a segmented control, with a coloured pump

FuelBoardWidgets/FuelBoardLiveActivityView.swift

@@ -41,7 +41,7 @@ struct FuelBoardLiveActivity: Widget {
                 }
             } compactLeading: {
                 Image(systemName: "fuelpump.fill")
-                    .foregroundStyle(.green)
+                    .foregroundStyle(context.state.fuel.tintColor)
             } compactTrailing: {
                 FuelBoardLiveActivityPriceView(context: context)
             } minimal: {
@@ -49,12 +49,15 @@ struct FuelBoardLiveActivity: Widget {
                     .font(.caption2.bold().monospacedDigit())
             }
         }
-        // NOTE: deliberately NO `.supplementalActivityFamilies([.small])`.
-        // That modifier makes iOS eligible to render this activity in the
-        // narrow `.small` form on the iPhone/iPad Lock Screen, which is what
-        // produced the squeezed, small-text card. Dropping it keeps the
-        // full-width Lock Screen card on iPhone/iPad; CarPlay still shows a
-        // small form via the Dynamic Island compact closures below.
+        .supplementalActivityFamilies([.small])
+        // Why `.small` is kept: it lets the SHARED body render a compact form
+        // in genuinely small slots (CarPlay small / Apple Watch smart stack)
+        // instead of falling back to the Dynamic Island compact closure —
+        // which could NOT show the station distance the user wants on CarPlay.
+        // The full-width iPhone/iPad card is protected by the `richMinWidth`
+        // gate on `richBody` + its flexible, truncating middle column, so
+        // iPhone/iPad still get the full card; only truly small space picks
+        // the compact strip below.
     }
 }
 
@@ -62,29 +65,59 @@ struct FuelBoardLiveActivity: Widget {
 private struct FuelBoardLiveActivityView: View {
     let context: ActivityViewContext<FuelBoardLiveActivityAttributes>
 
+    /// Below this ACTUAL proposed width we show the compact strip (CarPlay
+    /// small / Watch smart stack); at/above it we show the full card. The
+    /// decision is made from the real width the system hands the body, read
+    /// via a background GeometryReader — NOT ViewThatFits ideal-width
+    /// measurement (that's broken for truncating text: a long station name
+    /// inflated the "ideal" width past the iPhone Lock Screen and collapsed
+    /// the full card).
+    private let compactWidthThreshold: CGFloat = 280
+
+    /// Measured slot width (drives the rich-vs-compact branch). Measured in a
+    /// background GeometryReader so it does NOT act as the layout container:
+    /// a GeometryReader root pins content top-left, and forcing a
+    /// maxHeight:.infinity frame on it over-claims the whole proposed height,
+    /// centring the content below true vertical centre (bigger gap above) on
+    /// the Lock Screen. Measuring behind the scenes keeps the content
+    /// intrinsic-sized so the system vertically centres it itself.
+    @State private var slotWidth: CGFloat = 400
+
     var body: some View {
         Link(destination: context.state.mapsURL) {
-            // Always the full three-column card. The station caption is
-            // line-limited + scale-down + tail-truncated, so a LONG station
-            // name truncates in place instead of inflating this view's ideal
-            // width and tricking ViewThatFits into falling back to the compact
-            // strip (that is exactly what made 5-mi / long-named activities
-            // render small while 10-15-mi / short names stayed full).
-            //
-            // No ViewThatFits / compactBody: with `.supplementalActivityFamilies`
-            // removed, this body is only ever handed Lock-Screen width, so the
-            // compact fallback was both dead weight and the cause of the bug.
-            richBody
+            Group {
+                // Branch on the ACTUAL proposed width. iPhone/iPad offer the
+                // full Lock Screen width (>= threshold) → rich card, no matter
+                // how long the station name is. Truly small slots (CarPlay /
+                // Watch) offer much less → compact strip.
+                if slotWidth >= compactWidthThreshold {
+                    richBody
+                } else {
+                    compactBody
+                }
+            }
+            // Fill the card width so the background measure reads the real
+            // slot, not the intrinsic content width.
+            .frame(maxWidth: .infinity)
+            // Side-channel width measurement — never the layout container.
+            .background(
+                GeometryReader { geo in
+                    Color.clear
+                        .onAppear { slotWidth = geo.size.width }
+                        .onChange(of: geo.size.width) { _, w in slotWidth = w }
+                }
+            )
         }
     }
 
     /// Full three-column design (unchanged): brand glyph · fuel+station · price.
     private var richBody: some View {
         HStack(spacing: 12) {
-            // LEFT — station brand glyph
-            Image(systemName: "fuelpump.circle.fill")
-                .font(.system(size: 32))
-                .foregroundStyle(.green, .white)
+            // LEFT — station brand glyph: the fuel-tinted pump on its own. No
+            // background circle behind it (user request).
+            Image(systemName: "fuelpump.fill")
+                .font(.system(size: 28, weight: .semibold))
+                .foregroundStyle(context.state.fuel.tintColor)
                 .frame(width: 40, height: 40)
 
             // MIDDLE — fuel + station
@@ -113,7 +146,31 @@ private struct FuelBoardLiveActivityView: View {
         .padding()
     }
 
-    // NOTE: `compactBody` was removed — always render `richBody` (see body).
+    /// Minimal strip for small space (CarPlay small / Watch smart stack):
+    /// fuel type + bold price on one line, station · distance below.
+    /// Deliberately no app name and no "Tap for directions" — CarPlay is
+    /// display-only, and the user's asks here are just fuel + price + distance.
+    private var compactBody: some View {
+        VStack(alignment: .leading, spacing: 3) {
+            HStack(spacing: 5) {
+                Text(context.state.fuel.displayName)
+                    .font(.caption.bold())
+                    .lineLimit(1)
+                Spacer(minLength: 4)
+                FuelStore.priceTextAttributed(context.state.pricePence,
+                                               style: context.state.priceDisplayStyle,
+                                               size: 15, weight: .bold)
+                    .lineLimit(1)
+            }
+            Text("\(context.state.stationName) · \(context.state.distanceText)")
+                .font(.system(size: 9))
+                .foregroundStyle(.secondary)
+                .lineLimit(1)
+                .minimumScaleFactor(0.7)
+                .truncationMode(.tail)
+        }
+        .padding(8)
+    }
 }
 
 /// Dynamic Island expanded regions + compact trailing — price only.

Shared/FuelStore.swift

@@ -8,6 +8,7 @@
 //   keychain → app-group defaults → fallback.
 
 import Foundation
+import SwiftUI
 import Security
 #if canImport(AppIntents)
 import AppIntents
@@ -99,6 +100,20 @@ enum FuelType: String, Codable, CaseIterable, Identifiable {
     }
 }
 
+/// Fuel colour wheel (user-chosen palette): green = unleaded (#30D158),
+/// yellow = premium (#FFD60A), cyan = diesel (#64D2FF). Lives here in Shared
+/// so the app, widget, and Live Activity all tint the pump/fuel glyphs from one
+/// definition.
+extension FuelType {
+    var tintColor: Color {
+        switch self {
+        case .e10: return Color(red: 48/255.0, green: 209/255.0, blue: 88/255.0)      // #30D158
+        case .e5: return Color(red: 255/255.0, green: 214/255.0, blue: 10/255.0)      // #FFD60A
+        case .diesel: return Color(red: 100/255.0, green: 210/255.0, blue: 255/255.0) // #64D2FF
+        }
+    }
+}
+
 #if canImport(AppIntents)
 extension FuelType: AppEnum {}
 #endif
@@ -919,15 +934,19 @@ struct FuelStore {
     }
 
     // MARK: Onboarding — the app shows the intro screen on first launch only
-    // (a test button in the Alerts tab re-opens it). Stored in the app group
-    // so the widget can see it too if ever needed.
+    // (a test button in the Alerts tab re-opens it). Stored KEYCHAIN-FIRST
+    // (with an app-group mirror) for the same reason as favourites/distance
+    // unit: free SideStore accounts don't provision the app-group container,
+    // so an app-group-only flag silently fails to save AND reloads as false,
+    // making onboarding re-appear on every launch. Keychain survives reinstall
+    // and is shared with the extension.
 
     static func loadHasCompletedOnboarding() -> Bool {
-        UserDefaults(suiteName: appGroupSuite)?.bool(forKey: onboardingCompletedKey) ?? false
+        (loadString(service: onboardingCompletedKey) ?? "0") == "1"
     }
 
     static func saveHasCompletedOnboarding(_ completed: Bool) {
-        UserDefaults(suiteName: appGroupSuite)?.set(completed, forKey: onboardingCompletedKey)
+        saveString(completed ? "1" : "0", service: onboardingCompletedKey)
     }
 
     // MARK: Low-level keychain helpers