feat(web): model HP regen fields and map CHARACTER_TOO_WOUNDED

- Add hpRegenPerSecond and hpRegenSince fields to CharacterResponse
- Update inventory-page.component.spec.ts fixture with new fields
- Add CHARACTER_TOO_WOUNDED error mapping to combat.store
- Add test for CHARACTER_TOO_WOUNDED error mapping
- Update app.spec.ts and world.store.spec.ts fixtures for compilation

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

apps/web/src/app/app.spec.ts

@@ -158,6 +158,8 @@ describe('App', () => {
       currentHp: 52,
       maxHp: 80,
       attack: 12,
+      hpRegenPerSecond: 1,
+      hpRegenSince: null,
       currentLocation: { id: 'location-id', key: 'south-gate', name: 'Südtor von Graufurt' },
     });
     const fixture = TestBed.createComponent(AppShellComponent);