Location-driven results: widget fetches its own location (async, cache fallback), app auto-requests on first launch, Halifax sample stations

Shared/FuelStore.swift

@@ -12,6 +12,11 @@ import Security
 
 // MARK: - Fuel types
 
+struct Coordinate: Equatable, Codable {
+    let lat: Double
+    let lng: Double
+}
+
 enum FuelType: String, Codable, CaseIterable, Identifiable {
     case e10    // Unleaded 95 (E10)
     case e5     // Premium 97/98 (E5)
@@ -94,11 +99,11 @@ struct FuelStore {
 
     // MARK: Last known location ("lat,lng,unixTime")
 
-    static func loadLocation() -> (lat: Double, lng: Double, date: Date)? {
+    static func loadLocation() -> Coordinate? {
         let raw = loadString(service: locationKey)
         let parts = raw?.split(separator: ",").compactMap { Double($0) }
         guard let parts, parts.count == 3 else { return nil }
-        return (parts[0], parts[1], Date(timeIntervalSince1970: parts[2]))
+        return Coordinate(lat: parts[0], lng: parts[1])
     }
 
     static func saveLocation(lat: Double, lng: Double, date: Date = Date()) {