feat(web): show authoritative silver and XP in the top bar after victory

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

apps/web/src/app/features/world/world.store.spec.ts

@@ -332,4 +332,26 @@ describe('WorldStore', () => {
     expect(api.getCurrentTravel).toHaveBeenCalledTimes(2);
     expect(store.currentTravel()).toEqual(travelling);
   });
+
+  it('refreshCharacter replaces the character from authoritative server data', async () => {
+    await store.load();
+
+    api.getCharacter.mockReturnValue(of({ ...character, experience: 32, silver: 18 }));
+    await store.refreshCharacter();
+
+    expect(store.character()?.experience).toBe(32);
+    expect(store.character()?.silver).toBe(18);
+  });
+
+  it('keeps the previous character when the refresh fails', async () => {
+    await store.load();
+
+    api.getCharacter.mockReturnValue(
+      throwError(() => new HttpErrorResponse({ status: 500 })),
+    );
+    await store.refreshCharacter();
+
+    expect(store.character()?.silver).toBe(0);
+    expect(store.error()).toBeNull();
+  });
 });

apps/web/src/app/features/world/world.store.ts

@@ -77,6 +77,27 @@ export class WorldStore implements OnDestroy {
     this.selectedConnectionState.set(connection);
   }
 
+  /**
+   * Re-reads the character from the server, e.g. after a combat granted XP and
+   * silver. Never mutates the values locally: the server owns them (spec §35).
+   * A failed refresh leaves the last known character in place rather than
+   * blanking the HUD.
+   */
+  async refreshCharacter(): Promise<void> {
+    if (this.destroyed) {
+      return;
+    }
+
+    try {
+      const character = await firstValueFrom(this.api.getCharacter());
+      if (!this.destroyed) {
+        this.characterState.set(character);
+      }
+    } catch {
+      // Keep the previous character; the next load() will resync.
+    }
+  }
+
   async startTravel(): Promise<void> {
     if (this.destroyed) {
       return;