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/auth.interceptor.ts

@@ -14,8 +14,8 @@ export const authInterceptor: HttpInterceptorFn = (req, next) => {
   if (token && isProtectedEndpoint && !req.headers.has('Authorization')) {
     req = req.clone({
       setHeaders: {
-        Authorization: `Bearer ${token}`
-      }
+        Authorization: `Bearer ${token}`,
+      },
     });
   }