fix(web): carry the combat rewards field into the resume-combat fixture

The merge brought in `CombatDto.rewards`, which the resume spec's fixture
predates.

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

apps/web/src/app/core/resume-combat.spec.ts

@@ -19,6 +19,7 @@ const runningCombat: Combat = {
     artworkPath: '/images/enemies/RoadBandit.png',
   },
   events: [],
+  rewards: null,
 };
 
 describe('resuming an interrupted combat', () => {