Return all fuel prices per station (E5/E10/DIESEL) so clients switch fuel tabs without refetch

app/main.py

@@ -273,6 +273,13 @@ def stations(
             continue
         s_lat = station.get("latitude", station.get("lat"))
         s_lng = station.get("longitude", station.get("lng"))
+        # All known fuel grades for this station (E5/E10/DIESEL) so clients can
+        # switch fuel tabs without another request.
+        prices = {}
+        for grade in ("E5", "E10", "DIESEL"):
+            p = _fuel_price(station, grade)
+            if p is not None:
+                prices[grade] = p
         item = {
             "id": station.get("id") or station.get("station_id"),
             "name": station.get("name") or station.get("station_name"),
@@ -282,6 +289,7 @@ def stations(
             "lat": s_lat,
             "lng": s_lng,
             "price": price,
+            "prices": prices,
             "price_updated": station.get("price_updated") or station.get("updated_at"),
         }
         if lat is not None and lng is not None and isinstance(s_lat, (int, float)) and isinstance(s_lng, (int, float)):