feat(web): drop the XP block from the combat victory screen

Design ruling R16: the victory screen removes the data-reward-experience
element and its "Erfahrung" line outright rather than hiding them behind
a conditional. CombatReward is now { silver, items }.

The surviving spec assertion checks that [data-reward-experience] is
absent, so it would genuinely fail if the block came back -- rather than
merely observing that some text changed.

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

apps/web/src/app/features/combat/combat-page/combat-page.component.ts

@@ -105,7 +105,7 @@ export class CombatPageComponent implements OnInit {
       }
 
       if (after.status === 'WON') {
-        // The server already granted XP and silver; pull the authoritative
+        // The server already granted silver and renown; pull the authoritative
         // character so the HUD matches (spec §35).
         void this.worldStore.refreshCharacter();
       }