live activity: drop .small family so iPhone/iPad show full-width card

The active activity was rendering the narrow .small form on the iPhone Lock
Screen (squeezed, small text) because .supplementalActivityFamilies([.small])
made iOS eligible to present it that way. Remove it so iPhone/iPad always get
the full three-column card; CarPlay's small form still comes from the Dynamic
Island compact closures. Keep compactBody as a narrow-width safety fallback.

FuelBoardWidgets/FuelBoardLiveActivityView.swift

@@ -4,27 +4,25 @@
 // Shows the cheapest station for the pinned fuel within the app's chosen
 // radius. Tapping anywhere opens Apple Maps directions to that station.
 //
-// ADAPTIVE LAYOUT: ActivityConfiguration shares ONE content view across the
+// ADAPTIVE LAYOUT: the Lock Screen body provides two layouts and lets
-// Lock Screen, banner, and the CarPlay small slot — there is no per-platform
+// ViewThatFits pick by available width, but the narrow `.small` family is NOT
-// closure. So this view provides two layouts and lets ViewThatFits pick by
+// declared (see note on the config), so iPhone/iPad always render the full
-// available width:
+// three-column card (`richBody`) with proper text sizes. `compactBody` is kept
-//   • richBody  — the full three-column design (glyph · fuel+station · price),
+// as a safety fallback should any surface ever hand this view a narrow width.
-//                 wins wherever there's Lock Screen width (it carries an
+//
-//                 explicit minWidth so it can never be squeezed into the car).
+// IMPORTANT: `.supplementalActivityFamilies([.small])` is deliberately absent —
-//   • compactBody — a minimal price-strip (glyph+fuel+price, station caption
+// it made iOS render the squeezed `.small` card on the iPhone Lock Screen.
-//                 below) that wins in the CarPlay/Apple Watch Smart Stack
+// CarPlay's small form comes from the Dynamic Island compact closures.
-//                 small slot.
 
 import ActivityKit
 import SwiftUI
 import WidgetKit
 
 /// The Live Activity itself — registered in the widget bundle alongside the
-/// regular price widget. No CarPlay entitlement involved: this renders on the
+/// regular price widget. No CarPlay entitlement involved: renders on the
-/// Lock Screen, Dynamic Island, and the car display (CarPlay Ultra, iOS 26+).
+/// Lock Screen (full-width card on iPhone/iPad) and the Dynamic Island
-/// `.supplementalActivityFamilies([.small])` makes it eligible for the car's
+/// (incl. the island's compact form used in the car, display-only — FuelBoard
-/// small Live Activity slot — display-only there (FuelBoard is not a
+/// is not a CarPlay-enabled app, so car-side taps can't launch anything).
-/// CarPlay-enabled app, so car-side taps can't launch anything).
 struct FuelBoardLiveActivity: Widget {
     var body: some WidgetConfiguration {
         ActivityConfiguration(for: FuelBoardLiveActivityAttributes.self) { context in
@@ -51,7 +49,12 @@ struct FuelBoardLiveActivity: Widget {
                     .font(.caption2.bold().monospacedDigit())
             }
         }
-        .supplementalActivityFamilies([.small])
+        // 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.
     }
 }