Key sheet: padding on TOP + star cards

The two bottom cards (TOP, star) previously had no padding — their
background hugged the text. Add .padding(.horizontal, 14).padding(.vertical, 12),
matching (slightly exceeding) the RAG cards' vertical padding so the
info cards read as proper cards.

FuelBoard/StationsView.swift

@@ -222,6 +222,8 @@ struct StationsView: View {
                                         .font(.subheadline.weight(.semibold))
                                     Spacer(minLength: 0)
                                 }
+                                .padding(.horizontal, 14)
+                                .padding(.vertical, 12)
                                 .keyCardFill(color: .blue)
                                 HStack(spacing: 12) {
                                     Image(systemName: "star.fill")
@@ -232,6 +234,8 @@ struct StationsView: View {
                                         .font(.subheadline.weight(.semibold))
                                     Spacer(minLength: 0)
                                 }
+                                .padding(.horizontal, 14)
+                                .padding(.vertical, 12)
                                 .keyCardFill(color: .yellow)
                                 Text("Colours match each station's rating on the list")
                                     .font(.footnote)