App Store prep: privacy manifests, 1.0.1 (2), OGL attribution, UK empty state, screenshot harness

- PrivacyInfo.xcprivacy in app + widget targets (UserDefaults 1C8F.1;
  app declares Location linked + Diagnostics not-linked, no tracking)
- Version bump 1.0.1 (2) in App + Widget plists
- Settings → Data source footer: OGL attribution + 'refresh up to twice a day'
- Stations empty state: friendly UK-only explainer + 'Browse all UK stations'
- ContentView launch-arg harness (pattern of -showKeySheet): -skipOnboarding
  and -tab stations|favourites|alerts|settings for screenshot capture
- APPSTORE.md updated (blockers struck, tasks done, yuzu-hub workflow)
- BACKLOG.md hygiene: GitHub-first header, Trends merged note, offline-first-run DONE

FuelBoard/ContentView.swift

@@ -33,6 +33,7 @@ struct ContentView: View {
     @State private var isLoading = false
     @State private var statusMessage = ""
     @State private var showOnboarding = false
+    @State private var selectedTab = 0
     @State private var locationManager = LocationManager()
     @StateObject private var monitor = ProximityMonitor()
 
@@ -137,12 +138,14 @@ struct ContentView: View {
     }
 
     var body: some View {
-        TabView {
+        TabView(selection: $selectedTab) {
             stationsTab
                 .tabItem { Label("Stations", systemImage: "fuelpump.fill") }
+                .tag(0)
 
             favouritesTab
                 .tabItem { Label("Favourites", systemImage: "star.fill") }
+                .tag(1)
 
             AlertsView(
                 enabled: $alertsEnabled,
@@ -159,8 +162,10 @@ struct ContentView: View {
                 lastAlert: monitor.lastAlert
             )
             .tabItem { Label("Alerts", systemImage: "bell.fill") }
+            .tag(2)
 
             settingsTab
+                .tag(3)
         }
         .fullScreenCover(isPresented: $showOnboarding) {
             OnboardingView {
@@ -171,11 +176,28 @@ struct ContentView: View {
             StationMapView(request: request)
         }
         .onAppear {
+            // Launch-arg hooks for the screenshot/UI-test harness (same
+            // pattern as StationsView's `-showKeySheet`): `-tab <name>`
+            // opens the given tab; `-skipOnboarding` skips onboarding
+            // without touching the stored flag.
+            let args = ProcessInfo.processInfo.arguments
+            if let i = args.firstIndex(of: "-tab"), i + 1 < args.count {
+                switch args[i + 1] {
+                case "favourites": selectedTab = 1
+                case "alerts": selectedTab = 2
+                case "settings": selectedTab = 3
+                default: selectedTab = 0
+                }
+            }
             // Onboarding runs first on a fresh install — it owns the initial
             // permission prompts (location, notifications, and the data/local
             // network probe on the Data page). Location tracking and the first
             // network fetch start once it's done.
-            if FuelStore.loadHasCompletedOnboarding() {
+            // Launch-arg hook (UI-testing/screenshot harness, same pattern as
+            // StationsView's `-showKeySheet`): skip onboarding without
+            // touching the stored flag.
+            if FuelStore.loadHasCompletedOnboarding()
+                || args.contains("-skipOnboarding") {
                 locationManager.startForegroundTracking()
                 // Geofences must follow the user even in the background:
                 // wire the delegate hook (fires on every fix incl. background