feat: NCWF-5/6/7/8/9 chess analysis page and engine integration

- NCWF-5: scaffold /analysis route with ChessBoard viewer and navigation
- NCWF-6: FEN / PGN / Game-ID input form with depth selector
- NCWF-7: extend GameApiService with analyzePosition(); add AnalysisService
  with game-wide annotation pipeline; proxy /api/analysis -> :8087
- NCWF-8: EvalTimelineComponent — SVG win-chance chart per ply
- NCWF-9: AnnotatedMoveListComponent — quality labels (!! ! ?! ? ??)
  derived from win-chance delta

Also fix pre-existing app.spec.ts failure (missing provideHttpClient).
Apply project-wide prettier formatting pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/services/challenge-event.service.ts

@@ -8,71 +8,71 @@ import { Challenge } from '../models/challenge.models';
  */
 @Injectable({ providedIn: 'root' })
 export class ChallengeEventService {
-    private readonly incomingChallenges$ = new BehaviorSubject<Challenge[]>([]);
-    private readonly challengeReceived$ = new Subject<Challenge>();
-    private readonly challengeAccepted$ = new Subject<Challenge>();
-    private readonly challengeDeclined$ = new Subject<Challenge>();
+  private readonly incomingChallenges$ = new BehaviorSubject<Challenge[]>([]);
+  private readonly challengeReceived$ = new Subject<Challenge>();
+  private readonly challengeAccepted$ = new Subject<Challenge>();
+  private readonly challengeDeclined$ = new Subject<Challenge>();
 
-    getIncomingChallenges$(): Observable<Challenge[]> {
-        return this.incomingChallenges$.asObservable();
-    }
+  getIncomingChallenges$(): Observable<Challenge[]> {
+    return this.incomingChallenges$.asObservable();
+  }
 
-    getChallengeReceived$(): Observable<Challenge> {
-        return this.challengeReceived$.asObservable();
-    }
+  getChallengeReceived$(): Observable<Challenge> {
+    return this.challengeReceived$.asObservable();
+  }
 
-    getChallengeAccepted$(): Observable<Challenge> {
-        return this.challengeAccepted$.asObservable();
-    }
+  getChallengeAccepted$(): Observable<Challenge> {
+    return this.challengeAccepted$.asObservable();
+  }
 
-    getChallengeDeclined$(): Observable<Challenge> {
-        return this.challengeDeclined$.asObservable();
-    }
+  getChallengeDeclined$(): Observable<Challenge> {
+    return this.challengeDeclined$.asObservable();
+  }
 
-    /**
-     * Called when a new challenge is received via WebSocket
-     */
-    onChallengeReceived(challenge: Challenge): void {
-        const current = this.incomingChallenges$.value;
-        this.incomingChallenges$.next([...current, challenge]);
-        this.challengeReceived$.next(challenge);
-    }
+  /**
+   * Called when a new challenge is received via WebSocket
+   */
+  onChallengeReceived(challenge: Challenge): void {
+    const current = this.incomingChallenges$.value;
+    this.incomingChallenges$.next([...current, challenge]);
+    this.challengeReceived$.next(challenge);
+  }
 
-    /**
-     * Called when a challenge is accepted
-     */
-    onChallengeAccepted(challenge: Challenge): void {
-        const current = this.incomingChallenges$.value;
-        this.incomingChallenges$.next(current.filter(c => c.id !== challenge.id));
-        this.challengeAccepted$.next(challenge);
-    }
+  /**
+   * Called when a challenge is accepted
+   */
+  onChallengeAccepted(challenge: Challenge): void {
+    const current = this.incomingChallenges$.value;
+    this.incomingChallenges$.next(current.filter((c) => c.id !== challenge.id));
+    this.challengeAccepted$.next(challenge);
+  }
 
-    /**
-     * Called when a challenge is declined or expires
-     */
-    onChallengeRemoved(challengeId: string): void {
-        const current = this.incomingChallenges$.value;
-        this.incomingChallenges$.next(current.filter(c => c.id !== challengeId));
-    }
+  /**
+   * Called when a challenge is declined or expires
+   */
+  onChallengeRemoved(challengeId: string): void {
+    const current = this.incomingChallenges$.value;
+    this.incomingChallenges$.next(current.filter((c) => c.id !== challengeId));
+  }
 
-    /**
-     * Remove a challenge from the incoming list
-     */
-    removeChallenge(challengeId: string): void {
-        this.onChallengeRemoved(challengeId);
-    }
+  /**
+   * Remove a challenge from the incoming list
+   */
+  removeChallenge(challengeId: string): void {
+    this.onChallengeRemoved(challengeId);
+  }
 
-    /**
-     * Replace the full incoming list (used by HTTP polling)
-     */
-    setIncomingChallenges(challenges: Challenge[]): void {
-        this.incomingChallenges$.next(challenges);
-    }
+  /**
+   * Replace the full incoming list (used by HTTP polling)
+   */
+  setIncomingChallenges(challenges: Challenge[]): void {
+    this.incomingChallenges$.next(challenges);
+  }
 
-    /**
-     * Clear all incoming challenges (used on logout)
-     */
-    clear(): void {
-        this.incomingChallenges$.next([]);
-    }
+  /**
+   * Clear all incoming challenges (used on logout)
+   */
+  clear(): void {
+    this.incomingChallenges$.next([]);
+  }
 }