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/StationsView.swift

@@ -101,8 +101,20 @@ struct StationsView: View {
                             Text("Fetching prices…")
                         }
                     } else if stations.isEmpty {
-                        Text("No \(selectedFuel.displayName) stations found.")
-                            .foregroundStyle(.secondary)
+                        let miles = distanceUnit.displayMiles(stationLimit)
+                        let unit = distanceUnit.label(for: Double(miles))
+                        VStack(alignment: .leading, spacing: 6) {
+                            Text("No \(selectedFuel.displayName) stations within \(miles) \(unit).")
+                                .foregroundStyle(.secondary)
+                            Text("FuelBoard covers England, Scotland and Wales — try Closest to browse every UK station.")
+                                .font(.caption)
+                                .foregroundStyle(.secondary)
+                            Button("Browse all UK stations") {
+                                sortMode = .closest
+                            }
+                            .font(.caption)
+                        }
+                        .padding(.vertical, 4)
                     } else {
                         ForEach(Array(stations.prefix(visibleCount)), id: \.id) { station in
                             StationRow(