Backlog: add Siri/Shortcuts features (P1-P3); mark widget config done

BACKLOG.md

@@ -11,14 +11,22 @@ Status: TODO / IN PROGRESS / DONE / BLOCKED.
 
 ## P1 — Soon
 
-- [ ] **EV charging?** — National Chargepoint Registry as a 4th "Charging" tab
+- [ ] **Siri: "Cheapest [fuel] near me"** — `AppShortcutsProvider` + `CheapestFuelIntent`
-  (second relay endpoint, ~40k+ UK chargers, OGL, connector-type filter) vs fuel-only.
+  (App Intents, iOS 16+), dialog + price-card snippet, cached full-UK dump first
+  with freshness label ("as of 6am"), last-known-location fallback. Constraint:
+  fresh-data path needs a reachable source off-LAN — cached answers work anywhere
+  the app has previously fetched (see P3 data mirror).
+- [ ] **Siri: "Closest [fuel] station"** — same plumbing as cheapest, sort by
+  distance instead of price. Free second phrase in the same `AppShortcutsProvider`.
 
 ## P2 — Later
 
-- [ ] **Widget configuration** — let the widget's fuel be chosen per-widget
+- [ ] **Shortcuts: station price lookup** — `StationEntity` + `EntityQuery` so
-  (App Intent `FuelSelectionIntent` + `StaticConfiguration` → `AppIntentConfiguration`),
+  Shortcuts/Siri pick a station by name; `ReturnsValue<Double>` enables user
-  instead of inheriting the app's selected fuel. Requires iOS 17 `AppIntentConfiguration`.
+  automations ("get cheapest diesel → notify").
+- [ ] **Siri: favourite station price** — "What's diesel at my favourite station?"
+  (cheap once `StationEntity` exists).
+
 - [ ] **CarPlay** — widgets render but can't launch Maps; consider a proper CarPlay
   scene (CPListTemplate) for navigation deep-links.
 - [ ] **Alert region tuning** — make alert trigger radius + dedup window
@@ -33,6 +41,12 @@ Status: TODO / IN PROGRESS / DONE / BLOCKED.
 
 ## P3 — Ideas / Research
 
+- [ ] **Siri: create fuel alert** — voice-create an alert for a station. Deferred:
+  alert semantics (cheapest-within-radius + hourly dedup) are hard to express in
+  a dialog; needs the alert engine surfaced as an intent.
+- [ ] **App Intents testing** — AppIntentsTesting (iOS 27) for intent coverage
+  instead of XCUITest when the Siri features land.
+
 - [ ] **Production data mirror (GitHub)** — relay pushes the synced dump
   (`stations.json` + `latest.json` version pointer) to a PUBLIC GitHub repo; the
   app fetches `raw.githubusercontent.com` with the LAN relay as fallback source.
@@ -58,6 +72,10 @@ Status: TODO / IN PROGRESS / DONE / BLOCKED.
 - [x] Switch dataset to govuk API data — official Fuel Finder OAuth API via
   relay-api :8789 (source: api, ~8,012 stations); app baseURL → :8789; credentials
   live in relay `.env` only, never in the IPA
+- [x] Widget configuration — per-widget fuel/sort/distance via
+  `WidgetConfigurationIntent` (`AppIntentConfiguration`), distance options as
+  `WidgetDistance` AppEntity (`26e724f`); small widget gained Favourites
+  (`d0bd4e7`) + `.systemMedium` (`b94f769`)
 - [x] Unit test target for the app — FuelBoardShared XCTest target, 37 tests
   (title sanitizer, decode price guard, RAG thresholds, cheapest/closest baseline,
   miles↔km)