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/features/inventory/inventory-page.component.spec.ts

@@ -71,6 +71,8 @@ const character: CharacterResponse = {
   currentHp: 100,
   maxHp: 100,
   attack: 6,
+  hpRegenPerSecond: 1,
+  hpRegenSince: null,
   currentLocation: { id: 'loc-1', key: 'south-gate', name: 'Südtor' },
 };