test(bikeshare): pin the Barcelona load radii to their outermost stations

The map range check floors every radius at 100 km, so the station test
passed with any loadRadiusKm up to that. get_bike_share uses the radius as
registered, so assert each system's radius reaches the stations it lists.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/layers/bikeshare/barcelonaSystems.test.mjs

@@ -70,6 +70,26 @@ test('a camera over each outermost station activates its system', () => {
   }
 });
 
+test('each load radius reaches its outermost stations', () => {
+  // The range check floors every radius at 100 km, so the test above passes
+  // with any loadRadiusKm; get_bike_share uses the radius as registered.
+  for (const [id, expected] of Object.entries(SYSTEMS)) {
+    const system = CITY_BY_ID.get(id);
+    for (const station of expected.stations) {
+      const distance = parts.model.haversineKm(
+        system.centerLat,
+        system.centerLon,
+        station.lat,
+        station.lon,
+      );
+      assert.ok(
+        distance <= system.loadRadiusKm,
+        `${station.name} is ${distance.toFixed(1)} km from the ${id} centre`,
+      );
+    }
+  }
+});
+
 test('a camera over central Barcelona activates both systems', () => {
   // Plaça de Catalunya.
   const active = computeInRangeCities({ lat: 41.387, lon: 2.17 });