Refine the station listing: muted verdict capsules, three-line names

The listing's verdict capsule now carries white text on muted semantic
fills instead of the neutral secondary tint: Saves #45825E, Costs
#A9635B, Break even #707070, Closest #58789D.

Fixed tones, not translucent tints, because white text on a 15% tint
over a white row measures ~1.8:1. Each tone sits at a relative
luminance of ~0.18 — the band where white clears 4.5:1 AND the pill
still separates ~3:1 from both a white row and the dark card fill — so
one value each works in light and dark without a dynamic colour. The
saturated palette colours cannot carry white text at all: systemGreen
measures 2.2:1, systemRed 3.6:1.

"Save" becomes "Saves", matching the detail sheet and reading as a
statement of the outcome; amounts, symbols, padding, radius and the
shape-follows-line-count rule are unchanged. Saves and Costs share an
84pt minimum width so their trailing edges line up down the list.

The price and its capsule are now one vertically grouped element (5pt),
with the badge keeping the column's full 12pt above, so the row no
longer reads as three equal lines.

Station names cap at three lines with a tail ellipsis: unbounded wrap
let one very long forecourt name set the height of the whole row. 59 of
the 8,073 names in the dump exceed three lines and now ellipsise; the
full name is always in Station Details. Addresses still wrap freely.

The baseline pill moves onto ListingFuelSavingsCapsule so the listing
shows the same soft blue and white text as its siblings, leaving
FuelSavingsCapsule to the detail sheet, which it now alone uses.
Badges keep their tinted styling: they annotate a price rather than
report an outcome.

Verified: 261/261 swift test; Debug simulator and Release device
builds; all four fills and their white text measured from simulator
pixels in both appearances, and the detail sheet's .blue absent from
the listing entirely.

FuelBoard/FuelSavingsViews.swift

@@ -186,15 +186,36 @@ struct ListingFuelSavingsCapsule: View {
             // Never compress or truncate: the capsule wraps and the row grows taller.
             .fixedSize(horizontal: false, vertical: true)
         }
+        // White on the muted fill. These capsules carry a figure the eye is asked
+        // to read at a glance, which is why they are the only filled-and-white
+        // surfaces in the app; every badge stays tinted with coloured text.
         .font(.caption.weight(.semibold))
-        .foregroundStyle(.primary)
+        .foregroundStyle(.white)
         .padding(.horizontal, 8)
         .padding(.vertical, 4)
-        .background(shape.fill(Color.secondary.opacity(0.14)))
+        // Saves and Costs share one minimum width, so their trailing edges line
+        // up down the list whatever the figure's length. Break even and Closest
+        // station carry no figure and keep their natural width.
+        .frame(minWidth: minimumWidth, alignment: .leading)
+        .background(shape.fill(fill))
         .accessibilityElement(children: .combine)
         .accessibilityLabel(verdict.spokenText)
     }
 
+    /// Saves and Costs only — the two verdicts that carry a figure. See the
+    /// frame above: 84pt is the width the widest common amount needs
+    /// ("£123.45 more"), so shorter figures pad rather than shrink the pill.
+    private var minimumWidth: CGFloat {
+        switch result.status {
+        case .worthTheDrive, .notWorthTheDrive: return 84
+        case .breakEven, .baseline: return 0
+        }
+    }
+
+    private var fill: Color {
+        ListingCapsuleFill.color(for: result.status)
+    }
+
     /// One line keeps the capsule. Two or more switch to a rounded rect: a pill's
     /// semicircular ends crowd the text corners at that height, while an 8pt
     /// radius does not. Keyed to the LINE COUNT, so Break even flips shape only
@@ -213,4 +234,36 @@ struct ListingFuelSavingsCapsule: View {
         case .baseline: return "location.circle"
         }
     }
-}
+}
+
+/// The station listing's verdict-capsule fills: muted semantic colours carrying
+/// white text and icon.
+///
+/// Muted AND fixed, deliberately not the translucent tints used elsewhere in the
+/// app: white text on a 15% tint over a white row measures ~1.8:1 and is
+/// unreadable. Each tone below sits at a relative luminance of ~0.18 — the band
+/// where white text clears 4.5:1 AND the pill still separates ~3:1 from BOTH a
+/// white row and the dark card fill — so one value each works in both
+/// appearances without a dynamic colour.
+///
+/// The saturated palette colours cannot carry white text at all: measured
+/// white-on-fill is 2.2:1 for `systemGreen`, 3.6:1 for `systemRed` and 4.0:1 for
+/// `systemBlue`, every one of them below the 4.5:1 a caption needs. Muting is
+/// therefore a contrast requirement here, not only the mockup's taste.
+enum ListingCapsuleFill {
+    // Trailing comments record, per colour: white-on-fill / fill-vs-white-row /
+    // fill-vs-dark-row, measured rather than estimated.
+    static let saves = Color(red: 0x45 / 255, green: 0x82 / 255, blue: 0x5E / 255)     // 4.56 / 4.56 / 3.06
+    static let costs = Color(red: 0xA9 / 255, green: 0x63 / 255, blue: 0x5B / 255)     // 4.54 / 4.54 / 3.07
+    static let breakEven = Color(red: 0x70 / 255, green: 0x70 / 255, blue: 0x70 / 255) // 4.95 / 4.95 / 2.81
+    static let closest = Color(red: 0x58 / 255, green: 0x78 / 255, blue: 0x9D / 255)   // 4.52 / 4.52 / 3.09
+
+    static func color(for status: FuelSavingsStatus) -> Color {
+        switch status {
+        case .worthTheDrive: return saves
+        case .notWorthTheDrive: return costs
+        case .breakEven: return breakEven
+        case .baseline: return closest
+        }
+    }
+}