Redesign the More info sheet

The sheet leads with the station name and address inside the card, above the map, then a two-column facts row (fuel price on the left, distance and return on the right, split by a hairline) and the two station actions divided the same way. The Best Value block becomes a tinted card: verdict badge, the two figures the estimate is made of, the working and the total. "How Best Value works" moves to its own row below it, using the shared HowBestValueRow the Key sheet already shows.

Presentation only: every figure still comes from the shared sources (FuelStore.priceText, stationDistanceDisplay, FuelSavingsResult), so the sheet cannot disagree with the listing row, the widget or the Live Activity, and no calculation, ranking or freshness rule changed.

StationDistanceDisplay.returnLabel(unit:) and FuelSavingsFormat.extraTravelDistanceLabel(...) are split out of their caption forms so a surface printing the return or extra-travel figure on its own line takes it from the same place, confidence marker included; their existing output is unchanged, pinned by tests. FuelSavingsSummaryView is deleted - the sheet's card supersedes it and nothing referenced it.

DEBUG-only QA hooks: -qaConfigureSavings configures a Fuel Savings plan (the Best Value card and the Worth the Drive sort are gated on it), -qaDetailBottom scrolls to that card (defaultScrollAnchor is a no-op on a List) and -qaCopyPostcode holds the copied confirmation long enough to screenshot.

FuelBoardTests/Tests/FuelBoardSharedTests/FuelBoardTests.swift

@@ -787,6 +787,12 @@ final class RoadDistanceCacheTests: XCTestCase {
         XCTAssertEqual(confirmed.labelWithReturn(unit: .kilometers), "3.2 km (6.8 km return)")
         XCTAssertEqual(confirmed.spokenLabel(unit: .miles), "2.0 miles")
         XCTAssertEqual(confirmed.spokenLabelWithReturn(unit: .miles), "2.0 miles, 4.2 miles return")
+        // The return figure split out on its own — a surface that prints the
+        // one-way and the return distance on separate lines still gets BOTH from
+        // this type, marker included.
+        XCTAssertEqual(confirmed.returnLabel(unit: .miles), "4.2 mi return")
+        XCTAssertEqual(confirmed.returnLabel(unit: .kilometers), "6.8 km return")
+        XCTAssertEqual(confirmed.spokenReturnLabel(unit: .miles), "4.2 miles return")
 
         let approximate = FuelStore.stationDistanceDisplay(station: unrouted, userLat: 51.6, userLng: -0.1)
         XCTAssertTrue(approximate.isApproximate, "the straight-line fallback must be identified as one")
@@ -828,6 +834,10 @@ final class RoadDistanceCacheTests: XCTestCase {
         XCTAssertFalse(display.returnIsApproximate)
         XCTAssertEqual(display.labelWithReturn(unit: .miles), "2.9 mi (5.9 mi return)")
         XCTAssertEqual(display.spokenLabelWithReturn(unit: .miles), "2.9 miles, 5.9 miles return")
+        // The split-out return figure must use the INDEPENDENT return route
+        // (9.47 km), not a doubled one-way (2 × 4.65 = 9.30 km → 5.8 mi).
+        XCTAssertEqual(display.returnLabel(unit: .miles), "5.9 mi return")
+        XCTAssertEqual(display.spokenReturnLabel(unit: .miles), "5.9 miles return")
     }
 
     /// The marker tracks the cache on its own: same station, bare figure once its

FuelBoardTests/Tests/FuelBoardSharedTests/FuelSavingsEstimateTests.swift

@@ -640,6 +640,29 @@ final class FuelSavingsEstimateTests: XCTestCase {
         )
     }
 
+    /// The same figure on its own, for the sheet's row form ("Extra return
+    /// travel | 6.4 mi"): identical value and identical marker rule, so the row
+    /// and the caption can never disagree about being an estimate. Below the
+    /// 0.05-mile floor both forms return nil together.
+    func testExtraTravelDistanceLabelMatchesTheCaption() {
+        XCTAssertEqual(
+            FuelSavingsFormat.extraTravelDistanceLabel(extraDistanceMiles: 6.4, unit: .miles),
+            "6.4 mi"
+        )
+        XCTAssertEqual(
+            FuelSavingsFormat.extraTravelDistanceLabel(extraDistanceMiles: 6.4, unit: .miles, confidence: .estimated),
+            "Approx. 6.4 mi"
+        )
+        XCTAssertEqual(
+            FuelSavingsFormat.extraTravelDistanceLabel(extraDistanceMiles: 6.4, unit: .kilometers),
+            "10.3 km"
+        )
+        XCTAssertNil(
+            FuelSavingsFormat.extraTravelDistanceLabel(extraDistanceMiles: 0.04, unit: .miles),
+            "below the floor there is no extra travel to name"
+        )
+    }
+
     /// VoiceOver gets words, not abbreviations: "Approx." → "Approximately" and
     /// "mi"/"km" → "miles"/"kilometres".
     func testSpokenLabelsSpellOutTheAbbreviations() {