fix(api): clean up this slice's own lint violations

Fixed five prettier/prettier formatting errors in the three spec files
Slice 0.10 wrote or edited (world-discovery.service.spec.ts,
local-location-interaction.spec.ts, vertical-slice.seed.spec.ts).
Scoped by hand to just those locations so the pre-existing errors
elsewhere in the workspace, unrelated to this slice, are left alone.

Also corrects the implementation notes, which previously understated
the lint state as entirely pre-existing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/api/src/world/local-location-interaction.spec.ts

@@ -111,9 +111,11 @@ function buildService(options: {
   alreadyDiscovered?: boolean;
 }) {
   const currentLocation = location(BURNED_ROAD_ID, options.pointsOfInterest);
-  const discover = jest.fn().mockResolvedValue(
-    options.alreadyDiscovered ? null : { key: 'ash-pit', name: 'Ash Pit' },
-  );
+  const discover = jest
+    .fn()
+    .mockResolvedValue(
+      options.alreadyDiscovered ? null : { key: 'ash-pit', name: 'Ash Pit' },
+    );
   const worldDiscovery = {
     discover,
     isTravelAllowed: () => Promise.resolve(true),