Calculation audit (brief config: 30 MPG imperial, £60 fill-up, baseline
Rontec Shelf 171.9p at 0.4 mi):
- One mile<->kilometre constant pair (kilometresPerMile 1.609344,
metresPerMile 1609.344) replaces the mixed 1609.34 / 0.621371 / 1.60934
used in the savings path. Effect ~2 ppm (invisible), but the conversions
are now auditable in one place.
- New FuelSavingsCalculationAuditTests (20 deterministic tests, no live
MKDirections) pins the brief's three stations - Tesco 170.9p/2.0 mi,
MFG Hare & Hounds 172.9p/2.8 mi, PGG Napoleon 171.9p/2.8 mi - plus
imperial-vs-US gallon, MPG and budget scaling, the break-even tolerance
boundary, the nearer-candidate clamp, route-unavailable, mixed-basis
estimates and display-rounding boundaries.
- Formula unchanged, and verified correct: fixed quantity (budget / baseline
price), pump saving, round-trip extra distance clamped at zero, travel fuel
priced at the candidate station, +/-5p break even, baseline labelled
"Closest station", sorting on the unrounded net saving. The brief's "£0.18"
for Tesco is the rounded 1 dp extra-distance caption (2.02-2.05 mi reads as
"2.0 mi"), not a rounding bug in the money.
UI (uncommitted since d7a0ecb):
- Done bar drawn in the bottom safe area from keyboard notifications:
.toolbar(placement: .keyboard) is device-dependent (present on the 15 Pro,
absent on the SE on the same iOS build).
- Favourite star in the More-info heading, wired to the same fuel-scoped
toggle as the listing rows at all three call sites.
- CHEAPEST/TOP badge moved above the price so it reads as part of it.
- Listing rows carry the real session fill-up amount instead of a hard zero
(the compact banner does not print it today; a future row layout would).
153 tests, 0 failures. Simulator and device builds succeed.
- FuelTypeSegmentedPicker promoted to shared (was private in StationsView)
and parameterised by fuel list so Favourites passes only fuels with favourites
- Favourites tab swaps native .segmented picker for the capsule control with
green/purple/grey fuelpump icons, matching Stations
The gold-crown header row is redundant with the list itself (rows are already
cheapest-first with a TOP badge on the first). The bottom caption about
alerts monitoring stays.
- Alerts section restyled to mirror the Live Activity section: one section
with toggle + Fuel picker + Radius picker (was segmented fuel + slider)
- Alert radius options expanded to 1/2/3/5/8/10/15/20 (display unit, snapped
to nearest option; stored km unchanged; validation widened to 33 km)
- Live Activity section moved from Settings into the Alerts tab so both
'notify while driving' surfaces sit together
- SettingsView loses the Live Activity bindings/section
- IPHONEOS_DEPLOYMENT_TARGET 17.0 -> 26.0 (iPhone 11+, Apple's current floor)
- Widget CarPlay disfavor is now unconditional (no #available guard)
- Live Activity gains supplementalActivityFamilies([.small]) so it renders
in the car's small slot on CarPlay Ultra (display-only: FuelBoard has no
CarPlay entitlement, car taps can't launch anything)
- Settings → Live Activity now has Fuel and Distance pickers (5/10/15,
unit-aware) stored under fuelboard.liveActivityFuel / liveActivityRadiusMiles
- LiveActivityManager uses these instead of the Stations-tab selectedFuel /
stationLimit; Stations changes no longer re-target the pill
- Fuel moved from Activity attributes into ContentState so changing fuel in
Settings updates the RUNNING activity in place (no end+restart needed)
- Stations tab stays a pure data-interrogation + favourites surface
