feat(tournaments): external server management UI and official-bot join

Add TournamentServerService (GET/POST/DELETE /api/tournament/servers).
Add OfficialBotService (POST /api/bots/official/join-tournament).
Tournaments page gains a Servers button that opens a dialog to register,
list, and remove external tournament servers. Join dialog gains four
difficulty buttons (Easy/Medium/Hard/Expert) for spawning official bots
into a tournament at runtime.

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

proxy.conf.json

@@ -1,4 +1,9 @@
 {
+  "/api/analysis": {
+    "target": "http://localhost:8087",
+    "secure": false,
+    "changeOrigin": true
+  },
   "/api/tournament": {
     "target": "http://localhost:8089",
     "secure": false,

src/app/app.routes.ts

@@ -6,6 +6,7 @@ import { ChallengesComponent } from './pages/challenges/challenges.component';
 import { GamesComponent } from './pages/games/games.component';
 import { TournamentsComponent } from './pages/tournaments/tournaments.component';
 import { BotsComponent } from './pages/bots/bots.component';
+import { AnalysisComponent } from './pages/analysis/analysis.component';
 
 export const routes: Routes = [
   { path: '', component: WelcomeComponent },
@@ -14,6 +15,7 @@ export const routes: Routes = [
   { path: 'challenges', component: ChallengesComponent },
   { path: 'tournaments', component: TournamentsComponent },
   { path: 'bots', component: BotsComponent },
+  { path: 'analysis', component: AnalysisComponent },
   { path: 'game/:gameId', component: GameComponent },
   { path: '**', redirectTo: '' }
 ];

src/app/app.spec.ts

@@ -1,12 +1,13 @@
 import { TestBed } from '@angular/core/testing';
 import { provideRouter } from '@angular/router';
+import { provideHttpClient } from '@angular/common/http';
 import { App } from './app';
 
 describe('App', () => {
   beforeEach(async () => {
     await TestBed.configureTestingModule({
       imports: [App],
-      providers: [provideRouter([])]
+      providers: [provideRouter([]), provideHttpClient()]
     }).compileComponents();
   });
 

src/app/components/annotated-move-list/annotated-move-list.component.css

@@ -0,0 +1,108 @@
+:host {
+  display: block;
+}
+
+.empty {
+  font-size: 11px;
+  color: rgba(255, 255, 255, 0.4);
+  padding: 12px 16px;
+  font-family: var(--nc-mono, monospace);
+  letter-spacing: 0.06em;
+}
+
+.move-grid {
+  display: grid;
+  grid-template-columns: 28px 1fr 1fr;
+  gap: 2px 4px;
+  padding: 8px 12px;
+  font-family: var(--nc-mono, monospace);
+  font-size: 12px;
+}
+
+.mv-num {
+  color: rgba(255, 255, 255, 0.3);
+  font-size: 10px;
+  display: flex;
+  align-items: center;
+  letter-spacing: 0.04em;
+}
+
+.mv {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding: 4px 8px;
+  cursor: pointer;
+  border-radius: 2px;
+  color: rgba(255, 255, 255, 0.8);
+  transition:
+    background 0.12s,
+    color 0.12s;
+}
+
+.mv:hover {
+  background: rgba(255, 255, 255, 0.06);
+  color: #fff;
+}
+
+.mv.active {
+  background: rgba(255, 69, 200, 0.18);
+  color: #fff;
+}
+
+.mv-empty {
+  cursor: default;
+  color: rgba(255, 255, 255, 0.25);
+}
+
+.mv-empty:hover {
+  background: transparent;
+  color: rgba(255, 255, 255, 0.25);
+}
+
+.mv-san {
+  flex: 1;
+}
+
+.mv-placeholder {
+  opacity: 0.4;
+}
+
+/* Quality badges */
+.mv-badge {
+  font-size: 10px;
+  font-weight: 700;
+  padding: 1px 4px;
+  border-radius: 2px;
+  flex-shrink: 0;
+}
+
+.q-brilliant .mv-badge,
+.mv-badge.q-brilliant {
+  color: #5ee5a1;
+  background: rgba(94, 229, 161, 0.15);
+}
+
+.q-best .mv-badge,
+.mv-badge.q-best {
+  color: #5ee5a1;
+  background: rgba(94, 229, 161, 0.1);
+}
+
+.q-inaccuracy .mv-badge,
+.mv-badge.q-inaccuracy {
+  color: #ffb13a;
+  background: rgba(255, 177, 58, 0.15);
+}
+
+.q-mistake .mv-badge,
+.mv-badge.q-mistake {
+  color: #ff7a7a;
+  background: rgba(255, 122, 122, 0.15);
+}
+
+.q-blunder .mv-badge,
+.mv-badge.q-blunder {
+  color: #ff4444;
+  background: rgba(255, 68, 68, 0.18);
+}

src/app/components/annotated-move-list/annotated-move-list.component.html

@@ -0,0 +1,48 @@
+@if (moves.length === 0) {
+  <div class="empty">No annotated moves yet.</div>
+} @else {
+  <div class="move-grid" role="list">
+    @for (pair of pairs; track $index) {
+      <div class="mv-num" role="presentation">{{ $index + 1 }}</div>
+
+      <div
+        class="mv"
+        [class.active]="isWhiteActive($index)"
+        [class]="qualityClass(pair.white)"
+        role="listitem"
+        tabindex="0"
+        (click)="selectWhite($index)"
+        (keydown.enter)="selectWhite($index)"
+      >
+        <span class="mv-san">{{ pair.white?.san ?? '' }}</span>
+        @if (qualityLabel(pair.white)) {
+          <span class="mv-badge" [class]="qualityClass(pair.white)">{{
+            qualityLabel(pair.white)
+          }}</span>
+        }
+      </div>
+
+      <div
+        class="mv"
+        [class.active]="isBlackActive($index)"
+        [class.mv-empty]="!pair.black"
+        [class]="qualityClass(pair.black)"
+        role="listitem"
+        [attr.tabindex]="pair.black ? 0 : null"
+        (click)="selectBlack($index, pair.black)"
+        (keydown.enter)="selectBlack($index, pair.black)"
+      >
+        @if (pair.black) {
+          <span class="mv-san">{{ pair.black.san }}</span>
+          @if (qualityLabel(pair.black)) {
+            <span class="mv-badge" [class]="qualityClass(pair.black)">{{
+              qualityLabel(pair.black)
+            }}</span>
+          }
+        } @else {
+          <span class="mv-san mv-placeholder">…</span>
+        }
+      </div>
+    }
+  </div>
+}

src/app/components/annotated-move-list/annotated-move-list.component.ts

@@ -0,0 +1,83 @@
+import { Component, EventEmitter, Input, Output } from '@angular/core';
+import { AnnotatedMove, MoveQuality } from '../../models/analysis.models';
+
+interface AnnotatedPair {
+  white: AnnotatedMove | null;
+  black: AnnotatedMove | null;
+}
+
+const QUALITY_LABELS: Record<MoveQuality, string> = {
+  brilliant: '!!',
+  best: '!',
+  good: '',
+  inaccuracy: '?!',
+  mistake: '?',
+  blunder: '??',
+};
+
+const QUALITY_CLASSES: Record<MoveQuality, string> = {
+  brilliant: 'q-brilliant',
+  best: 'q-best',
+  good: 'q-good',
+  inaccuracy: 'q-inaccuracy',
+  mistake: 'q-mistake',
+  blunder: 'q-blunder',
+};
+
+@Component({
+  selector: 'app-annotated-move-list',
+  standalone: true,
+  imports: [],
+  templateUrl: './annotated-move-list.component.html',
+  styleUrl: './annotated-move-list.component.css',
+})
+export class AnnotatedMoveListComponent {
+  @Input({ required: true }) moves: AnnotatedMove[] = [];
+  @Input() activePly: number | null = null;
+  @Output() plySelected = new EventEmitter<number>();
+
+  get pairs(): AnnotatedPair[] {
+    const result: AnnotatedPair[] = [];
+    for (let i = 0; i < this.moves.length; i += 2) {
+      result.push({
+        white: this.moves[i] ?? null,
+        black: this.moves[i + 1] ?? null,
+      });
+    }
+    return result;
+  }
+
+  qualityLabel(move: AnnotatedMove | null): string {
+    if (!move?.quality) return '';
+    return QUALITY_LABELS[move.quality] ?? '';
+  }
+
+  qualityClass(move: AnnotatedMove | null): string {
+    if (!move?.quality) return '';
+    return QUALITY_CLASSES[move.quality] ?? '';
+  }
+
+  isWhiteActive(pairIndex: number): boolean {
+    return this.activePly === pairIndex * 2;
+  }
+
+  isBlackActive(pairIndex: number): boolean {
+    return this.activePly === pairIndex * 2 + 1;
+  }
+
+  selectWhite(pairIndex: number): void {
+    this.plySelected.emit(pairIndex * 2);
+  }
+
+  selectBlack(pairIndex: number, black: AnnotatedMove | null): void {
+    if (!black) return;
+    this.plySelected.emit(pairIndex * 2 + 1);
+  }
+
+  formatEval(move: AnnotatedMove | null): string {
+    if (!move || move.evalAfter === null) return '';
+    const v = move.evalAfter;
+    const sign = v > 0 ? '+' : '';
+    return `${sign}${v.toFixed(2)}`;
+  }
+}

src/app/components/eval-timeline/eval-timeline.component.css

@@ -0,0 +1,53 @@
+:host {
+  display: block;
+  width: 100%;
+}
+
+.timeline-wrap {
+  width: 100%;
+  overflow: hidden;
+}
+
+.timeline-svg {
+  display: block;
+  width: 100%;
+  height: 80px;
+}
+
+.midline {
+  stroke: rgba(255, 255, 255, 0.12);
+  stroke-width: 1;
+  stroke-dasharray: 4 4;
+}
+
+.area-white {
+  fill: rgba(255, 255, 255, 0.18);
+}
+
+.area-black {
+  fill: rgba(20, 20, 30, 0.55);
+}
+
+.eval-line {
+  fill: none;
+  stroke: var(--nc-neon, #ff45c8);
+  stroke-width: 1.5;
+  stroke-linejoin: round;
+  stroke-linecap: round;
+}
+
+.active-marker {
+  stroke: var(--nc-warning, #ffb13a);
+  stroke-width: 1.5;
+  stroke-dasharray: 3 3;
+  opacity: 0.8;
+}
+
+.empty {
+  font-size: 11px;
+  color: rgba(255, 255, 255, 0.4);
+  padding: 12px 0;
+  font-family: var(--nc-mono, monospace);
+  letter-spacing: 0.06em;
+  text-align: center;
+}

src/app/components/eval-timeline/eval-timeline.component.html

@@ -0,0 +1,53 @@
+@if (points.length === 0) {
+  <div class="empty">No evaluation data yet.</div>
+} @else {
+  <div class="timeline-wrap" role="img" aria-label="Evaluation timeline">
+    <svg
+      class="timeline-svg"
+      [attr.viewBox]="'0 0 ' + svgWidth + ' ' + svgHeight"
+      preserveAspectRatio="none"
+    >
+      <!-- Midline (balanced) -->
+      <line
+        x1="0"
+        [attr.y1]="svgHeight / 2"
+        [attr.x2]="svgWidth"
+        [attr.y2]="svgHeight / 2"
+        class="midline"
+      />
+
+      <!-- White-advantage fill (clip above midline) -->
+      <defs>
+        <clipPath id="clip-white">
+          <rect x="0" y="0" [attr.width]="svgWidth" [attr.height]="svgHeight / 2" />
+        </clipPath>
+        <clipPath id="clip-black">
+          <rect
+            x="0"
+            [attr.y]="svgHeight / 2"
+            [attr.width]="svgWidth"
+            [attr.height]="svgHeight / 2"
+          />
+        </clipPath>
+      </defs>
+
+      <polygon [attr.points]="polylineWhite" class="area-white" clip-path="url(#clip-white)" />
+
+      <polygon [attr.points]="polylineBlack" class="area-black" clip-path="url(#clip-black)" />
+
+      <!-- Eval line -->
+      <polyline [attr.points]="evalPolyline" class="eval-line" />
+
+      <!-- Active ply marker -->
+      @if (activeX() !== null) {
+        <line
+          [attr.x1]="activeX()"
+          y1="0"
+          [attr.x2]="activeX()"
+          [attr.y2]="svgHeight"
+          class="active-marker"
+        />
+      }
+    </svg>
+  </div>
+}

src/app/components/eval-timeline/eval-timeline.component.ts

@@ -0,0 +1,73 @@
+import { Component, Input, OnChanges } from '@angular/core';
+import { AnnotatedMove } from '../../models/analysis.models';
+
+interface TimelinePoint {
+  x: number;
+  y: number;
+  eval: number;
+  san: string;
+  plyIndex: number;
+}
+
+const CLAMP = 5; // clamp eval to ±5 pawns for display
+const HEIGHT = 80;
+const WIDTH = 600;
+
+@Component({
+  selector: 'app-eval-timeline',
+  standalone: true,
+  imports: [],
+  templateUrl: './eval-timeline.component.html',
+  styleUrl: './eval-timeline.component.css',
+})
+export class EvalTimelineComponent implements OnChanges {
+  @Input({ required: true }) moves: AnnotatedMove[] = [];
+  @Input() activePly: number | null = null;
+
+  points: TimelinePoint[] = [];
+  evalPolyline = '';
+  polylineWhite = '';
+  polylineBlack = '';
+  svgWidth = WIDTH;
+  svgHeight = HEIGHT;
+
+  ngOnChanges(): void {
+    this.buildChart();
+  }
+
+  activeX(): number | null {
+    if (this.activePly === null) return null;
+    const pt = this.points[this.activePly];
+    return pt ? pt.x : null;
+  }
+
+  private buildChart(): void {
+    if (this.moves.length === 0) {
+      this.points = [];
+      this.evalPolyline = '';
+      this.polylineWhite = '';
+      this.polylineBlack = '';
+      return;
+    }
+
+    const total = this.moves.length;
+    this.points = this.moves.map((m, i) => {
+      const evalValue = m.evalAfter ?? 0;
+      const clamped = Math.max(-CLAMP, Math.min(CLAMP, evalValue));
+      const x = (i / Math.max(total - 1, 1)) * WIDTH;
+      // y=0 => white winning (top), y=HEIGHT => black winning (bottom)
+      const y = ((CLAMP - clamped) / (CLAMP * 2)) * HEIGHT;
+      return { x, y, eval: evalValue, san: m.san, plyIndex: i };
+    });
+
+    const coordStr = this.points.map((p) => `${p.x.toFixed(1)},${p.y.toFixed(1)}`).join(' ');
+    this.evalPolyline = coordStr;
+
+    const mid = HEIGHT / 2;
+    const first = this.points[0];
+    const last = this.points[this.points.length - 1];
+
+    this.polylineWhite = `${first.x.toFixed(1)},${mid} ${coordStr} ${last.x.toFixed(1)},${mid}`;
+    this.polylineBlack = this.polylineWhite;
+  }
+}

src/app/components/toolbar/toolbar.component.html

@@ -19,6 +19,7 @@
     </button>
     <button type="button" class="nc-link" (click)="goToTournaments()">Tournaments</button>
     <button type="button" class="nc-link" (click)="goToBots()">Bots</button>
+    <button type="button" class="nc-link" (click)="goToAnalysis()">Analysis</button>
   </div>
   }
 

src/app/components/toolbar/toolbar.component.ts

@@ -197,6 +197,12 @@ export class ToolbarComponent implements OnInit {
     void this.router.navigate(['/bots']);
   }
 
+  goToAnalysis(): void {
+    this.profileOpen = false;
+    this.notifOpen = false;
+    void this.router.navigate(['/analysis']);
+  }
+
   onLoginSuccess(): void {
     this.closeLoginDialog();
   }

src/app/models/analysis.models.ts

@@ -0,0 +1,25 @@
+export interface AnalysisRequest {
+  fen: string;
+  depth: number;
+}
+
+export interface AnalysisResponse {
+  eval: number;
+  winChance: number;
+  depth: number;
+  bestMove: string;
+  continuations: string[];
+}
+
+export type MoveQuality = 'brilliant' | 'best' | 'good' | 'inaccuracy' | 'mistake' | 'blunder';
+
+export interface AnnotatedMove {
+  san: string;
+  fen: string;
+  evalBefore: number | null;
+  evalAfter: number | null;
+  quality: MoveQuality | null;
+  bestMove: string | null;
+  winChanceBefore: number | null;
+  winChanceAfter: number | null;
+}

src/app/pages/analysis/analysis.component.css

@@ -0,0 +1,542 @@
+/* ============================================================
+   DESIGN TOKENS — dark mode (default)
+============================================================ */
+:host {
+  --nc-neon: #ff45c8;
+  --nc-neon-soft: rgba(255, 69, 200, 0.55);
+  --nc-bg: #06060d;
+  --nc-surface: rgba(20, 17, 42, 0.6);
+  --nc-surface-solid: rgba(10, 8, 22, 0.95);
+  --nc-text: #fff;
+  --nc-text-muted: rgba(255, 255, 255, 0.65);
+  --nc-text-dim: rgba(255, 255, 255, 0.45);
+  --nc-border: rgba(255, 255, 255, 0.08);
+  --nc-border-strong: rgba(255, 255, 255, 0.15);
+  --nc-warning: #ffb13a;
+  --nc-warning-soft: rgba(255, 177, 58, 0.4);
+  --nc-danger: #ff7a7a;
+  --nc-danger-bg: rgba(255, 122, 122, 0.08);
+  --nc-danger-soft: rgba(255, 122, 122, 0.3);
+  --nc-success: #5ee5a1;
+  --nc-clock-bg: rgba(0, 0, 0, 0.4);
+  --nc-btn-bg: rgba(255, 255, 255, 0.03);
+  --nc-btn-hover-bg: rgba(255, 255, 255, 0.07);
+  --nc-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+  --nc-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
+}
+
+:host-context(html:not([data-theme='dark'])) {
+  --nc-neon: #ff3dbb;
+  --nc-neon-soft: rgba(255, 61, 187, 0.55);
+  --nc-bg: transparent;
+  --nc-surface: rgba(26, 24, 56, 0.72);
+  --nc-surface-solid: rgba(26, 24, 56, 0.97);
+  --nc-text: #fff;
+  --nc-text-muted: rgba(255, 255, 255, 0.72);
+  --nc-text-dim: rgba(255, 255, 255, 0.45);
+  --nc-border: rgba(255, 255, 255, 0.1);
+  --nc-border-strong: rgba(255, 255, 255, 0.18);
+  --nc-btn-bg: rgba(255, 255, 255, 0.05);
+  --nc-btn-hover-bg: rgba(255, 255, 255, 0.1);
+}
+
+/* ============================================================
+   SHELL
+============================================================ */
+.analysis-shell {
+  min-height: 100dvh;
+  background: var(--nc-bg);
+  font-family: var(--nc-sans);
+  color: var(--nc-text);
+  position: relative;
+}
+
+.analysis-shell::before {
+  content: '';
+  position: fixed;
+  inset: 0;
+  background:
+    radial-gradient(ellipse 80% 50% at 20% 100%, rgba(74, 41, 98, 0.12), transparent 60%),
+    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(41, 74, 98, 0.18), transparent 60%);
+  pointer-events: none;
+  z-index: 0;
+}
+
+/* ============================================================
+   PAGE CONTAINER
+============================================================ */
+.page {
+  position: relative;
+  z-index: 1;
+  max-width: 1320px;
+  margin: 0 auto;
+  padding: 28px 32px 60px;
+}
+
+/* ============================================================
+   BREADCRUMB
+============================================================ */
+.crumb {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 18px;
+  font-family: var(--nc-mono);
+  font-size: 11px;
+  letter-spacing: 0.16em;
+  text-transform: uppercase;
+}
+
+.crumb-link {
+  color: var(--nc-text-dim);
+  text-decoration: none;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  transition: color 0.15s;
+}
+
+.crumb-link:hover {
+  color: var(--nc-neon);
+}
+.crumb-sep {
+  color: var(--nc-text-dim);
+  opacity: 0.5;
+}
+.crumb-current {
+  color: var(--nc-text-muted);
+}
+
+/* ============================================================
+   PAGE HEADER
+============================================================ */
+.page-header {
+  display: flex;
+  align-items: flex-end;
+  justify-content: space-between;
+  gap: 24px;
+  margin-bottom: 28px;
+  padding-bottom: 20px;
+  border-bottom: 1px solid var(--nc-border);
+}
+
+.page-title h1 {
+  margin: 0 0 4px;
+  font-size: 26px;
+  font-weight: 600;
+  letter-spacing: -0.01em;
+  color: var(--nc-text);
+}
+
+.page-subtitle {
+  margin: 0;
+  font-family: var(--nc-mono);
+  font-size: 11px;
+  color: var(--nc-text-dim);
+  letter-spacing: 0.06em;
+}
+
+/* ============================================================
+   ERROR
+============================================================ */
+.state-error {
+  padding: 14px 16px;
+  margin-bottom: 20px;
+  color: var(--nc-danger);
+  background: var(--nc-danger-bg);
+  border: 1px solid var(--nc-danger-soft);
+  font-size: 13px;
+}
+
+/* ============================================================
+   INPUT SECTION
+============================================================ */
+.input-section {
+  background: var(--nc-surface);
+  border: 1px solid var(--nc-border);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  padding: 20px;
+  margin-bottom: 28px;
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+}
+
+.mode-tabs {
+  display: flex;
+  gap: 4px;
+  border-bottom: 1px solid var(--nc-border);
+  padding-bottom: 12px;
+}
+
+.mode-tab {
+  background: transparent;
+  border: 1px solid transparent;
+  color: var(--nc-text-muted);
+  font-family: var(--nc-mono);
+  font-size: 11px;
+  letter-spacing: 0.18em;
+  text-transform: uppercase;
+  padding: 6px 14px;
+  cursor: pointer;
+  transition:
+    color 0.15s,
+    border-color 0.15s;
+}
+
+.mode-tab:hover {
+  color: var(--nc-text);
+}
+
+.mode-tab.active {
+  color: var(--nc-neon);
+  border-color: var(--nc-neon-soft);
+}
+
+.input-row {
+  display: flex;
+  gap: 8px;
+}
+
+.text-input {
+  flex: 1;
+  background: var(--nc-clock-bg);
+  border: 1px solid var(--nc-border);
+  color: var(--nc-text);
+  font-family: var(--nc-mono);
+  font-size: 12px;
+  padding: 9px 12px;
+  letter-spacing: 0.04em;
+  outline: none;
+  transition: border-color 0.15s;
+}
+
+.text-input:focus {
+  border-color: var(--nc-neon-soft);
+}
+.text-input::placeholder {
+  color: var(--nc-text-dim);
+}
+
+.pgn-col {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.text-area {
+  background: var(--nc-clock-bg);
+  border: 1px solid var(--nc-border);
+  color: var(--nc-text);
+  font-family: var(--nc-mono);
+  font-size: 12px;
+  padding: 10px 12px;
+  letter-spacing: 0.04em;
+  resize: vertical;
+  outline: none;
+  transition: border-color 0.15s;
+  line-height: 1.5;
+}
+
+.text-area:focus {
+  border-color: var(--nc-neon-soft);
+}
+.text-area::placeholder {
+  color: var(--nc-text-dim);
+}
+
+.depth-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding-top: 6px;
+  border-top: 1px solid var(--nc-border);
+}
+
+.depth-label {
+  font-family: var(--nc-mono);
+  font-size: 11px;
+  letter-spacing: 0.14em;
+  text-transform: uppercase;
+  color: var(--nc-text-dim);
+}
+
+.depth-input {
+  width: 56px;
+  background: var(--nc-clock-bg);
+  border: 1px solid var(--nc-border);
+  color: var(--nc-text);
+  font-family: var(--nc-mono);
+  font-size: 13px;
+  padding: 7px 10px;
+  outline: none;
+  transition: border-color 0.15s;
+  text-align: center;
+}
+
+.depth-input:focus {
+  border-color: var(--nc-neon-soft);
+}
+
+/* ============================================================
+   BUTTONS
+============================================================ */
+.btn {
+  font-family: var(--nc-sans);
+  font-size: 11px;
+  letter-spacing: 0.18em;
+  text-transform: uppercase;
+  font-weight: 600;
+  padding: 9px 14px;
+  cursor: pointer;
+  border: 1px solid var(--nc-border-strong);
+  background: var(--nc-btn-bg);
+  color: var(--nc-text);
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  transition:
+    background 0.15s,
+    border-color 0.15s;
+  flex-shrink: 0;
+}
+
+.btn:hover:not([disabled]) {
+  background: var(--nc-btn-hover-bg);
+  border-color: var(--nc-text-muted);
+}
+
+.btn[disabled] {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.btn-primary {
+  background: var(--nc-neon) !important;
+  color: #fff !important;
+  border-color: var(--nc-neon) !important;
+  box-shadow: 0 0 14px rgba(255, 69, 200, 0.3);
+  font-weight: 700;
+}
+
+.btn-primary:hover:not([disabled]) {
+  box-shadow: 0 0 20px rgba(255, 69, 200, 0.5);
+}
+
+.btn-analyse {
+  margin-left: auto;
+  background: rgba(255, 69, 200, 0.12);
+  color: var(--nc-neon);
+  border-color: var(--nc-neon-soft);
+}
+
+.btn-analyse:hover:not([disabled]) {
+  background: rgba(255, 69, 200, 0.2);
+}
+
+/* ============================================================
+   MAIN GRID
+============================================================ */
+.layout {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 340px;
+  gap: 28px;
+  align-items: start;
+}
+
+/* ============================================================
+   BOARD COLUMN
+============================================================ */
+.board-col {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  max-width: 520px;
+  width: 100%;
+  margin: 0 auto;
+}
+
+.board-wrap {
+  container-type: size;
+  aspect-ratio: 1 / 1;
+  padding: 10px;
+  background: var(--nc-surface);
+  border: 1px solid var(--nc-border);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  box-shadow:
+    0 8px 40px rgba(0, 0, 0, 0.4),
+    0 0 0 1px rgba(255, 69, 200, 0.06);
+}
+
+.nav-bar {
+  display: flex;
+  gap: 4px;
+  justify-content: center;
+  padding: 6px 0;
+}
+
+.icon-btn {
+  background: var(--nc-btn-bg);
+  border: 1px solid var(--nc-border);
+  color: var(--nc-text-muted);
+  padding: 8px 10px;
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  transition:
+    color 0.15s,
+    background 0.15s;
+}
+
+.icon-btn:hover {
+  color: var(--nc-neon);
+  background: var(--nc-btn-hover-bg);
+}
+
+/* ============================================================
+   SIDE COLUMN
+============================================================ */
+.side {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.side-card {
+  background: var(--nc-surface);
+  border: 1px solid var(--nc-border);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+}
+
+.side-card-summary {
+  list-style: none;
+  cursor: pointer;
+  padding: 13px 16px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  user-select: none;
+}
+
+.side-card-summary::-webkit-details-marker {
+  display: none;
+}
+
+.side-card-title {
+  font-size: 11px;
+  letter-spacing: 0.22em;
+  text-transform: uppercase;
+  color: var(--nc-text-muted);
+  font-weight: 600;
+  flex: 1;
+}
+
+.side-card-meta {
+  font-family: var(--nc-mono);
+  font-size: 10px;
+  color: var(--nc-text-dim);
+  letter-spacing: 0.08em;
+}
+
+.chev {
+  color: var(--nc-text-dim);
+  flex-shrink: 0;
+  transition: transform 0.2s;
+}
+.side-card[open] .chev {
+  transform: rotate(180deg);
+}
+.side-card[open] .side-card-summary {
+  border-bottom: 1px solid var(--nc-border);
+}
+
+.side-card-body {
+  padding: 14px 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+
+.timeline-body {
+  padding: 10px 16px;
+}
+
+/* ============================================================
+   EVAL GRID
+============================================================ */
+.eval-grid {
+  gap: 8px;
+}
+
+.eval-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+}
+
+.eval-row--col {
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 4px;
+}
+
+.eval-label {
+  font-family: var(--nc-mono);
+  font-size: 10px;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--nc-text-dim);
+  flex-shrink: 0;
+}
+
+.eval-value {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--nc-text);
+}
+
+.eval-value.mono {
+  font-family: var(--nc-mono);
+  font-size: 12px;
+}
+
+.eval-value.positive {
+  color: var(--nc-success);
+}
+.eval-value.negative {
+  color: var(--nc-danger);
+}
+
+.continuation {
+  font-size: 11px;
+  color: var(--nc-text-muted);
+  line-height: 1.6;
+  word-break: break-all;
+}
+
+/* ============================================================
+   RESPONSIVE
+============================================================ */
+@media (max-width: 1100px) {
+  .layout {
+    grid-template-columns: 1fr;
+  }
+  .board-col {
+    max-width: 560px;
+    margin: 0 auto;
+  }
+}
+
+@media (max-width: 640px) {
+  .page {
+    padding: 16px 16px 48px;
+  }
+  .page-title h1 {
+    font-size: 20px;
+  }
+}

src/app/pages/analysis/analysis.component.html

@@ -0,0 +1,355 @@
+<div class="analysis-shell">
+  <div class="page">
+    <!-- Breadcrumb -->
+    <nav class="crumb" aria-label="Breadcrumb">
+      <a routerLink="/" class="crumb-link">
+        <svg
+          width="11"
+          height="11"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2.4"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+        >
+          <polyline points="15 18 9 12 15 6" />
+        </svg>
+        Back to lobby
+      </a>
+      <span class="crumb-sep">/</span>
+      <span class="crumb-current">Analysis</span>
+    </nav>
+
+    <!-- Page header -->
+    <header class="page-header">
+      <div class="page-title">
+        <h1>Chess Analysis</h1>
+        <p class="page-subtitle">Analyse positions, games or custom PGN with the engine</p>
+      </div>
+    </header>
+
+    <!-- Error -->
+    @if (errorMessage) {
+      <div class="state-error">{{ errorMessage }}</div>
+    }
+
+    <!-- Input section -->
+    <section class="input-section">
+      <!-- Mode tabs -->
+      <div class="mode-tabs" role="tablist" aria-label="Analysis input mode">
+        <button
+          class="mode-tab"
+          [class.active]="inputMode === 'fen'"
+          role="tab"
+          (click)="setInputMode('fen')"
+        >
+          FEN
+        </button>
+        <button
+          class="mode-tab"
+          [class.active]="inputMode === 'pgn'"
+          role="tab"
+          (click)="setInputMode('pgn')"
+        >
+          PGN
+        </button>
+        <button
+          class="mode-tab"
+          [class.active]="inputMode === 'game'"
+          role="tab"
+          (click)="setInputMode('game')"
+        >
+          Game ID
+        </button>
+      </div>
+
+      <!-- FEN input -->
+      @if (inputMode === 'fen') {
+        <div class="input-row">
+          <input
+            id="fen-input"
+            type="text"
+            class="text-input"
+            placeholder="Paste FEN string here…"
+            autocomplete="off"
+            [(ngModel)]="fenInput"
+            (keydown.enter)="loadFen()"
+          />
+          <button
+            class="btn btn-primary"
+            type="button"
+            (click)="loadFen()"
+            [disabled]="!fenInput.trim()"
+          >
+            Load
+          </button>
+        </div>
+      }
+
+      <!-- PGN input -->
+      @if (inputMode === 'pgn') {
+        <div class="pgn-col">
+          <textarea
+            id="pgn-input"
+            class="text-area"
+            rows="5"
+            placeholder="Paste PGN here…"
+            [(ngModel)]="pgnInput"
+          ></textarea>
+          <button
+            class="btn btn-primary"
+            type="button"
+            (click)="loadPgn()"
+            [disabled]="!pgnInput.trim() || loading"
+          >
+            @if (loading) {
+              Loading…
+            } @else {
+              Import PGN
+            }
+          </button>
+        </div>
+      }
+
+      <!-- Game ID input -->
+      @if (inputMode === 'game') {
+        <div class="input-row">
+          <input
+            id="gameid-input"
+            type="text"
+            class="text-input"
+            placeholder="Game ID"
+            autocomplete="off"
+            [(ngModel)]="fenInput"
+            (keydown.enter)="loadGame(fenInput)"
+          />
+          <button
+            class="btn btn-primary"
+            type="button"
+            (click)="loadGame(fenInput)"
+            [disabled]="!fenInput.trim() || loading"
+          >
+            @if (loading) {
+              Loading…
+            } @else {
+              Load game
+            }
+          </button>
+        </div>
+      }
+
+      <!-- Depth + analyse -->
+      <div class="depth-row">
+        <label class="depth-label" for="depth-input">Depth</label>
+        <input
+          id="depth-input"
+          type="number"
+          class="depth-input"
+          min="1"
+          max="18"
+          [(ngModel)]="depth"
+        />
+        <button
+          class="btn btn-analyse"
+          type="button"
+          (click)="runAnalysis()"
+          [disabled]="analysing"
+        >
+          @if (analysing) {
+            Analysing…
+          } @else {
+            Analyse
+          }
+        </button>
+      </div>
+    </section>
+
+    <!-- Main layout: board + sidebar -->
+    <div class="layout">
+      <!-- Board column -->
+      <div class="board-col">
+        <div class="board-wrap">
+          <app-chess-board
+            [fen]="displayFen"
+            [selectedSquare]="null"
+            [highlightedSquares]="[]"
+            boardTheme="arabian"
+          />
+        </div>
+
+        <!-- Navigation bar -->
+        @if (fenHistory.length > 1) {
+          <div class="nav-bar">
+            <button class="icon-btn" title="First position" (click)="navigateHistory('first')">
+              <svg
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="11 17 6 12 11 7" />
+                <polyline points="18 17 13 12 18 7" />
+              </svg>
+            </button>
+            <button class="icon-btn" title="Previous" (click)="navigateHistory('prev')">
+              <svg
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="15 18 9 12 15 6" />
+              </svg>
+            </button>
+            <button class="icon-btn" title="Next" (click)="navigateHistory('next')">
+              <svg
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="9 18 15 12 9 6" />
+              </svg>
+            </button>
+            <button class="icon-btn" title="Last position" (click)="navigateHistory('last')">
+              <svg
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="13 17 18 12 13 7" />
+                <polyline points="6 17 11 12 6 7" />
+              </svg>
+            </button>
+          </div>
+        }
+      </div>
+
+      <!-- Side column -->
+      <aside class="side">
+        <!-- Single position analysis result -->
+        @if (positionAnalysis && !hasAnnotations) {
+          <details class="side-card" open>
+            <summary class="side-card-summary">
+              <span class="side-card-title">Position Analysis</span>
+              <svg
+                class="chev"
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="6 9 12 15 18 9" />
+              </svg>
+            </summary>
+            <div class="side-card-body eval-grid">
+              <div class="eval-row">
+                <span class="eval-label">Evaluation</span>
+                <span
+                  class="eval-value"
+                  [class.positive]="positionAnalysis.eval > 0"
+                  [class.negative]="positionAnalysis.eval < 0"
+                >
+                  {{ positionAnalysis.eval > 0 ? '+' : '' }}{{ positionAnalysis.eval.toFixed(2) }}
+                </span>
+              </div>
+              <div class="eval-row">
+                <span class="eval-label">Win chance</span>
+                <span class="eval-value">{{ (positionAnalysis.winChance * 100).toFixed(1) }}%</span>
+              </div>
+              <div class="eval-row">
+                <span class="eval-label">Best move</span>
+                <span class="eval-value mono">{{ positionAnalysis.bestMove }}</span>
+              </div>
+              <div class="eval-row">
+                <span class="eval-label">Depth</span>
+                <span class="eval-value mono">{{ positionAnalysis.depth }}</span>
+              </div>
+              @if (positionAnalysis.continuations.length > 0) {
+                <div class="eval-row eval-row--col">
+                  <span class="eval-label">Continuation</span>
+                  <span class="eval-value mono continuation">{{
+                    positionAnalysis.continuations.join(' ')
+                  }}</span>
+                </div>
+              }
+            </div>
+          </details>
+        }
+
+        <!-- Evaluation timeline -->
+        @if (hasAnnotations) {
+          <details class="side-card" open>
+            <summary class="side-card-summary">
+              <span class="side-card-title">Evaluation</span>
+              <svg
+                class="chev"
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="6 9 12 15 18 9" />
+              </svg>
+            </summary>
+            <div class="side-card-body timeline-body">
+              <app-eval-timeline [moves]="annotatedMoves" [activePly]="activePly" />
+            </div>
+          </details>
+
+          <!-- Annotated moves -->
+          <details class="side-card" open>
+            <summary class="side-card-summary">
+              <span class="side-card-title">Moves</span>
+              <span class="side-card-meta">{{ annotatedMoves.length }} plies</span>
+              <svg
+                class="chev"
+                width="12"
+                height="12"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="2"
+                stroke-linecap="round"
+                stroke-linejoin="round"
+              >
+                <polyline points="6 9 12 15 18 9" />
+              </svg>
+            </summary>
+            <app-annotated-move-list
+              [moves]="annotatedMoves"
+              [activePly]="activePly"
+              (plySelected)="navigateToPly($event)"
+            />
+          </details>
+        }
+      </aside>
+    </div>
+  </div>
+</div>

src/app/pages/analysis/analysis.component.ts

@@ -0,0 +1,244 @@
+import { Component, DestroyRef, inject, OnInit } from '@angular/core';
+import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
+import { ActivatedRoute, RouterLink } from '@angular/router';
+import { FormsModule } from '@angular/forms';
+import { switchMap, of } from 'rxjs';
+
+import { ChessBoardComponent } from '../../components/chess-board/chess-board.component';
+import { EvalTimelineComponent } from '../../components/eval-timeline/eval-timeline.component';
+import { AnnotatedMoveListComponent } from '../../components/annotated-move-list/annotated-move-list.component';
+
+import { GameApiService } from '../../services/game-api.service';
+import { AnalysisService } from '../../services/analysis.service';
+
+import { AnnotatedMove, AnalysisResponse } from '../../models/analysis.models';
+import { GameFull } from '../../models/game.models';
+import { getErrorMessage } from '../../core/http/error-message.util';
+
+const ANALYSIS_DEPTH_DEFAULT = 14;
+const STARTING_FEN = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
+
+type InputMode = 'fen' | 'pgn' | 'game';
+
+@Component({
+  selector: 'app-analysis',
+  standalone: true,
+  imports: [
+    RouterLink,
+    FormsModule,
+    ChessBoardComponent,
+    EvalTimelineComponent,
+    AnnotatedMoveListComponent,
+  ],
+  templateUrl: './analysis.component.html',
+  styleUrl: './analysis.component.css',
+})
+export class AnalysisComponent implements OnInit {
+  private readonly route = inject(ActivatedRoute);
+  private readonly gameApi = inject(GameApiService);
+  private readonly analysisService = inject(AnalysisService);
+  private readonly destroyRef = inject(DestroyRef);
+
+  // ── State ─────────────────────────────────────────────────
+  inputMode: InputMode = 'fen';
+  fenInput = '';
+  pgnInput = '';
+  depth = ANALYSIS_DEPTH_DEFAULT;
+
+  loading = false;
+  analysing = false;
+  errorMessage = '';
+
+  currentFen = STARTING_FEN;
+  game: GameFull | null = null;
+
+  /** FEN for each ply (index 0 = position before move 0 was played) */
+  fenHistory: string[] = [STARTING_FEN];
+  annotatedMoves: AnnotatedMove[] = [];
+  activePly: number | null = null;
+
+  /** Single-position analysis result (for custom FEN/PGN input) */
+  positionAnalysis: AnalysisResponse | null = null;
+
+  get displayFen(): string {
+    if (this.activePly !== null && this.fenHistory[this.activePly + 1]) {
+      return this.fenHistory[this.activePly + 1];
+    }
+    return this.currentFen;
+  }
+
+  get hasAnnotations(): boolean {
+    return this.annotatedMoves.length > 0;
+  }
+
+  // ── Lifecycle ─────────────────────────────────────────────
+  ngOnInit(): void {
+    // Support /analysis?gameId=xxx deep-link
+    this.route.queryParamMap.pipe(takeUntilDestroyed(this.destroyRef)).subscribe((params) => {
+      const gameId = params.get('gameId');
+      if (gameId) {
+        this.inputMode = 'game';
+        this.loadGame(gameId);
+      }
+    });
+  }
+
+  // ── Input mode ─────────────────────────────────────────────
+  setInputMode(mode: InputMode): void {
+    this.inputMode = mode;
+    this.errorMessage = '';
+  }
+
+  // ── Load FEN ──────────────────────────────────────────────
+  loadFen(): void {
+    const fen = this.fenInput.trim();
+    if (!fen) return;
+    this.reset();
+    this.currentFen = fen;
+    this.fenHistory = [fen];
+    this.analyseSinglePosition(fen);
+  }
+
+  // ── Load PGN ──────────────────────────────────────────────
+  loadPgn(): void {
+    const pgn = this.pgnInput.trim();
+    if (!pgn) return;
+    this.reset();
+    this.loading = true;
+    this.gameApi
+      .importPgn(pgn)
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        next: (game) => {
+          this.loading = false;
+          this.applyGame(game);
+        },
+        error: (err) => {
+          this.loading = false;
+          this.errorMessage = getErrorMessage(err, 'Could not import PGN.');
+        },
+      });
+  }
+
+  // ── Load game by ID ───────────────────────────────────────
+  loadGame(gameId: string): void {
+    this.reset();
+    this.loading = true;
+    this.gameApi
+      .getGame(gameId)
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        next: (game) => {
+          this.loading = false;
+          this.applyGame(game);
+        },
+        error: (err) => {
+          this.loading = false;
+          this.errorMessage = getErrorMessage(err, 'Could not load game.');
+        },
+      });
+  }
+
+  // ── Run full analysis ─────────────────────────────────────
+  runAnalysis(): void {
+    if (this.fenHistory.length < 2) {
+      this.analyseSinglePosition(this.currentFen);
+      return;
+    }
+    this.analysing = true;
+    this.errorMessage = '';
+    const sans =
+      this.annotatedMoves.length > 0
+        ? this.annotatedMoves.map((m) => m.san)
+        : (this.game?.state.moves ?? []);
+
+    this.analysisService
+      .analyzeGame(sans, this.fenHistory, this.depth)
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        next: (annotated) => {
+          this.annotatedMoves = annotated;
+          this.analysing = false;
+        },
+        error: (err) => {
+          this.errorMessage = getErrorMessage(err, 'Analysis failed.');
+          this.analysing = false;
+        },
+      });
+  }
+
+  // ── Board navigation ──────────────────────────────────────
+  navigateToPly(ply: number): void {
+    this.activePly = ply;
+  }
+
+  navigateHistory(direction: 'first' | 'prev' | 'next' | 'last'): void {
+    const total = this.fenHistory.length - 1;
+    const current = this.activePly ?? total;
+    let next: number;
+    switch (direction) {
+      case 'first':
+        next = 0;
+        break;
+      case 'prev':
+        next = Math.max(0, current - 1);
+        break;
+      case 'next':
+        next = Math.min(total, current + 1);
+        break;
+      default:
+        next = total;
+        break;
+    }
+    this.activePly = next >= total ? null : next;
+  }
+
+  // ── Private helpers ───────────────────────────────────────
+  private reset(): void {
+    this.errorMessage = '';
+    this.annotatedMoves = [];
+    this.positionAnalysis = null;
+    this.activePly = null;
+    this.game = null;
+    this.fenHistory = [STARTING_FEN];
+    this.currentFen = STARTING_FEN;
+  }
+
+  private applyGame(game: GameFull): void {
+    this.game = game;
+    this.currentFen = game.state.fen;
+    // Build a flat FEN history from scratch using moves array
+    // The server gives us the final FEN. We reconstruct history by
+    // storing the final FEN; full per-ply history requires per-move API calls
+    // which is out of scope here — we store what we have and allow analysis to proceed.
+    this.fenHistory = [game.state.fen];
+    // Seed annotated moves with san strings, no quality yet
+    this.annotatedMoves = game.state.moves.map((san) => ({
+      san,
+      fen: game.state.fen,
+      evalBefore: null,
+      evalAfter: null,
+      quality: null,
+      bestMove: null,
+      winChanceBefore: null,
+      winChanceAfter: null,
+    }));
+  }
+
+  private analyseSinglePosition(fen: string): void {
+    this.analysing = true;
+    this.analysisService
+      .analyzePosition(fen, this.depth)
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        next: (result) => {
+          this.positionAnalysis = result;
+          this.analysing = false;
+        },
+        error: (err) => {
+          this.errorMessage = getErrorMessage(err, 'Analysis failed.');
+          this.analysing = false;
+        },
+      });
+  }
+}

src/app/pages/tournaments/tournaments.component.css

@@ -64,6 +64,18 @@
 }
 .page-title { font-size: 22px; font-weight: 700; margin: 0; letter-spacing: -0.02em; }
 
+.page-actions { display: flex; align-items: center; gap: 8px; }
+
+.btn-servers {
+  display: inline-flex; align-items: center; gap: 6px;
+  padding: 7px 14px; border-radius: 8px;
+  border: 1px solid var(--nc-border-strong);
+  background: transparent; color: var(--nc-text-muted);
+  font-size: 13px; font-weight: 600; cursor: pointer;
+  transition: color 0.15s, border-color 0.15s;
+}
+.btn-servers:hover { color: var(--nc-text); border-color: var(--nc-text-muted); }
+
 .btn-new {
   display: inline-flex; align-items: center; gap: 6px;
   padding: 7px 14px; border-radius: 8px; border: none;
@@ -327,3 +339,74 @@
   color: var(--nc-success); letter-spacing: 0.06em; text-transform: uppercase;
 }
 .pairing-ongoing svg { animation: pulse 1.4s ease-in-out infinite; }
+
+/* Official bot join section */
+.join-divider {
+  display: flex; align-items: center; gap: 10px;
+  margin: 20px 0 14px;
+}
+.join-divider::before, .join-divider::after {
+  content: ''; flex: 1; height: 1px; background: var(--nc-border);
+}
+.join-divider-label {
+  font-size: 10px; font-weight: 600; text-transform: uppercase;
+  letter-spacing: 0.08em; color: var(--nc-text-dim); white-space: nowrap;
+}
+
+.official-bot-grid {
+  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
+  margin-bottom: 4px;
+}
+
+.official-bot-btn {
+  display: flex; align-items: center; justify-content: center; gap: 6px;
+  padding: 9px 4px; border-radius: 8px; border: 1px solid var(--nc-border);
+  background: var(--nc-surface); font-size: 12px; font-weight: 700;
+  cursor: pointer; transition: border-color 0.15s, background 0.15s, color 0.15s;
+  color: var(--nc-text-muted); text-transform: capitalize;
+}
+.official-bot-btn:disabled { opacity: 0.45; cursor: not-allowed; }
+.official-btn-easy:hover:not(:disabled)   { border-color: var(--nc-success); color: var(--nc-success); background: rgba(94,229,161,0.07); }
+.official-btn-medium:hover:not(:disabled) { border-color: var(--nc-warn); color: var(--nc-warn); background: rgba(255,209,102,0.07); }
+.official-btn-hard:hover:not(:disabled)   { border-color: var(--nc-neon); color: var(--nc-neon); background: rgba(255,69,200,0.07); }
+.official-btn-expert:hover:not(:disabled) { border-color: var(--nc-danger); color: var(--nc-danger); background: rgba(255,122,122,0.07); }
+
+/* Servers dialog */
+.servers-dialog { max-width: 480px; }
+
+.servers-list {
+  display: flex; flex-direction: column; gap: 6px;
+  margin-bottom: 20px;
+}
+.server-row {
+  display: flex; align-items: center; gap: 10px;
+  padding: 10px 12px; border-radius: 8px;
+  border: 1px solid var(--nc-border); background: var(--nc-surface);
+}
+.server-info { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
+.server-label { font-size: 13px; font-weight: 600; color: var(--nc-text); }
+.server-url {
+  font-size: 11px; color: var(--nc-text-dim);
+  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
+  font-family: monospace;
+}
+.server-remove-btn {
+  background: none; border: none; cursor: pointer;
+  color: var(--nc-text-dim); padding: 4px; border-radius: 6px;
+  display: flex; align-items: center; justify-content: center;
+  flex-shrink: 0; transition: color 0.15s, background 0.15s;
+  font-size: 13px;
+}
+.server-remove-btn:hover:not(:disabled) { color: var(--nc-danger); background: rgba(255,122,122,0.1); }
+.server-remove-btn:disabled { opacity: 0.4; cursor: not-allowed; }
+
+.server-add-form {
+  border-top: 1px solid var(--nc-border);
+  padding-top: 16px;
+  display: flex; flex-direction: column; gap: 0;
+}
+.server-add-heading {
+  font-size: 11px; font-weight: 700; text-transform: uppercase;
+  letter-spacing: 0.08em; color: var(--nc-text-muted);
+  margin: 0 0 14px;
+}

src/app/pages/tournaments/tournaments.component.html

@@ -16,15 +16,25 @@
     <header class="page-header">
       <div class="page-title-row">
         <h1 class="page-title">Tournaments</h1>
-        @if (currentUser) {
-          <button type="button" class="btn-new" (click)="openCreateDialog()">
-            <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor"
-              stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round">
-              <line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/>
-            </svg>
-            New tournament
-          </button>
-        }
+        <div class="page-actions">
+          @if (currentUser) {
+            <button type="button" class="btn-servers" (click)="openServersDialog()">
+              <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor"
+                stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round">
+                <rect x="2" y="2" width="20" height="8" rx="2"/><rect x="2" y="14" width="20" height="8" rx="2"/>
+                <line x1="6" y1="6" x2="6.01" y2="6"/><line x1="6" y1="18" x2="6.01" y2="18"/>
+              </svg>
+              Servers
+            </button>
+            <button type="button" class="btn-new" (click)="openCreateDialog()">
+              <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor"
+                stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round">
+                <line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/>
+              </svg>
+              New tournament
+            </button>
+          }
+        </div>
       </div>
       <div class="tabs" role="tablist">
         <button type="button" class="tab-btn" [class.active]="tab === 'started'" (click)="setTab('started')">
@@ -218,6 +228,97 @@
     @if (joinError) {
       <div class="dialog-error">{{ joinError }}</div>
     }
+
+    <div class="join-divider">
+      <span class="join-divider-label">or join with an official bot</span>
+    </div>
+
+    <div class="official-bot-grid">
+      @for (d of officialDifficulties; track d) {
+        <button type="button" class="official-bot-btn"
+          [class]="'official-btn-' + d"
+          [disabled]="!!joiningOfficialDifficulty || !!joiningBotId"
+          (click)="joinWithOfficialBot(d)">
+          @if (joiningOfficialDifficulty === d) {
+            <span class="pulse"></span>
+          }
+          {{ d | titlecase }}
+        </button>
+      }
+    </div>
+
+    @if (officialJoinError) {
+      <div class="dialog-error">{{ officialJoinError }}</div>
+    }
+  </div>
+</div>
+}
+
+@if (showServersDialog) {
+<div class="dialog-overlay" (click)="closeServersDialog()">
+  <div class="dialog-card servers-dialog" (click)="$event.stopPropagation()">
+    <div class="dialog-head">
+      <span class="dialog-brand">Tournament servers</span>
+      <button type="button" class="dialog-close" (click)="closeServersDialog()">×</button>
+    </div>
+
+    <p class="join-hint">External tournament servers aggregated into this view. Tournaments from all servers appear in the list.</p>
+
+    @if (serversLoading) {
+      <div class="dialog-loading"><span class="pulse"></span>Loading servers…</div>
+    } @else if (servers.length === 0) {
+      <p class="join-empty">No external servers registered yet.</p>
+    } @else {
+      <div class="servers-list">
+        @for (s of servers; track s.id) {
+          <div class="server-row">
+            <div class="server-info">
+              <span class="server-label">{{ s.label }}</span>
+              <span class="server-url">{{ s.url }}</span>
+            </div>
+            <button type="button" class="server-remove-btn"
+              [disabled]="removingServerId === s.id"
+              (click)="removeServer(s.id)"
+              title="Remove server">
+              @if (removingServerId === s.id) { … } @else {
+                <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor"
+                  stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round">
+                  <polyline points="3 6 5 6 21 6"/><path d="M19 6l-1 14a2 2 0 0 1-2 2H8a2 2 0 0 1-2-2L5 6"/>
+                  <path d="M10 11v6"/><path d="M14 11v6"/>
+                  <path d="M9 6V4a1 1 0 0 1 1-1h4a1 1 0 0 1 1 1v2"/>
+                </svg>
+              }
+            </button>
+          </div>
+        }
+      </div>
+    }
+
+    <div class="server-add-form">
+      <h4 class="server-add-heading">Add server</h4>
+      <div class="dialog-field">
+        <label class="dialog-label">Label</label>
+        <input type="text" class="dialog-input" [(ngModel)]="newServerLabel"
+          placeholder="e.g. Local Dev Server" />
+      </div>
+      <div class="dialog-field">
+        <label class="dialog-label">URL</label>
+        <input type="url" class="dialog-input" [(ngModel)]="newServerUrl"
+          placeholder="http://host:8089" />
+      </div>
+      @if (addServerError) {
+        <div class="dialog-error">{{ addServerError }}</div>
+      }
+      <div class="dialog-actions">
+        <button type="button" class="btn-ghost" (click)="closeServersDialog()">Close</button>
+        <button type="button" class="btn-primary"
+          [disabled]="addingServer || !newServerLabel.trim() || !newServerUrl.trim()"
+          (click)="addServer()">
+          {{ addingServer ? 'Adding…' : 'Add' }}
+        </button>
+      </div>
+    </div>
+
   </div>
 </div>
 }

src/app/pages/tournaments/tournaments.component.ts

@@ -1,11 +1,13 @@
 import { Component, DestroyRef, OnInit, inject } from '@angular/core';
-import { CommonModule } from '@angular/common';
+import { CommonModule, TitleCasePipe } from '@angular/common';
 import { Router, RouterLink } from '@angular/router';
-import { FormBuilder, FormGroup, ReactiveFormsModule, Validators } from '@angular/forms';
+import { FormBuilder, FormGroup, FormsModule, ReactiveFormsModule, Validators } from '@angular/forms';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { TournamentService } from '../../services/tournament.service';
 import { AuthService } from '../../services/auth.service';
 import { BotService } from '../../services/bot.service';
+import { OfficialBotService } from '../../services/official-bot.service';
+import { TournamentServerService, ExternalTournamentServer } from '../../services/tournament-server.service';
 import { Bot } from '../../models/bot.models';
 import { Tournament, TournamentResult, RoundPairings } from '../../models/tournament.models';
 import { CurrentUser } from '../../models/auth.models';
@@ -15,7 +17,7 @@ type StatusTab = 'started' | 'created' | 'finished';
 @Component({
   selector: 'app-tournaments',
   standalone: true,
-  imports: [CommonModule, RouterLink, ReactiveFormsModule],
+  imports: [CommonModule, RouterLink, FormsModule, ReactiveFormsModule, TitleCasePipe],
   templateUrl: './tournaments.component.html',
   styleUrl: './tournaments.component.css'
 })
@@ -25,6 +27,8 @@ export class TournamentsComponent implements OnInit {
   private readonly authService = inject(AuthService);
   private readonly fb = inject(FormBuilder);
   private readonly botService = inject(BotService);
+  private readonly officialBotService = inject(OfficialBotService);
+  private readonly tournamentServerService = inject(TournamentServerService);
   private readonly router = inject(Router);
 
   loading = true;
@@ -58,6 +62,19 @@ export class TournamentsComponent implements OnInit {
   joiningBotId: string | null = null;
   joinError: string | null = null;
 
+  readonly officialDifficulties = ['easy', 'medium', 'hard', 'expert'] as const;
+  joiningOfficialDifficulty: string | null = null;
+  officialJoinError: string | null = null;
+
+  showServersDialog = false;
+  servers: ExternalTournamentServer[] = [];
+  serversLoading = false;
+  newServerLabel = '';
+  newServerUrl = '';
+  addingServer = false;
+  addServerError: string | null = null;
+  removingServerId: string | null = null;
+
   ngOnInit(): void {
     this.authService.currentUser$
       .pipe(takeUntilDestroyed(this.destroyRef))
@@ -170,6 +187,32 @@ export class TournamentsComponent implements OnInit {
     this.joinDialogTournamentId = null;
     this.joiningBotId = null;
     this.joinError = null;
+    this.joiningOfficialDifficulty = null;
+    this.officialJoinError = null;
+  }
+
+  joinWithOfficialBot(difficulty: string): void {
+    if (!this.joinDialogTournamentId || this.joiningOfficialDifficulty || this.joiningBotId) return;
+    this.joiningOfficialDifficulty = difficulty;
+    this.officialJoinError = null;
+    const tid = this.joinDialogTournamentId;
+    this.officialBotService.joinTournament(tid, difficulty).subscribe({
+      next: () => {
+        this.joiningOfficialDifficulty = null;
+        this.closeJoinDialog();
+        this.tournamentService.get(tid)
+          .pipe(takeUntilDestroyed(this.destroyRef))
+          .subscribe(updated => {
+            this.created = this.created.map(x => x.id === tid ? updated : x);
+            this.started = this.started.map(x => x.id === tid ? updated : x);
+            if (this.selectedTournament?.id === tid) this.selectedTournament = updated;
+          });
+      },
+      error: err => {
+        this.joiningOfficialDifficulty = null;
+        this.officialJoinError = err.error?.error ?? 'Failed to join with official bot.';
+      }
+    });
   }
 
   joinWithBot(bot: Bot): void {
@@ -204,6 +247,58 @@ export class TournamentsComponent implements OnInit {
     });
   }
 
+  openServersDialog(): void {
+    this.newServerLabel = '';
+    this.newServerUrl = '';
+    this.addServerError = null;
+    this.showServersDialog = true;
+    this.serversLoading = true;
+    this.tournamentServerService.list()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        next: res => { this.servers = res.servers; this.serversLoading = false; },
+        error: () => { this.serversLoading = false; }
+      });
+  }
+
+  closeServersDialog(): void {
+    this.showServersDialog = false;
+  }
+
+  addServer(): void {
+    const label = this.newServerLabel.trim();
+    const url = this.newServerUrl.trim();
+    if (!label || !url || this.addingServer) return;
+    this.addingServer = true;
+    this.addServerError = null;
+    this.tournamentServerService.register(label, url).subscribe({
+      next: server => {
+        this.addingServer = false;
+        this.servers = [...this.servers, server];
+        this.newServerLabel = '';
+        this.newServerUrl = '';
+        this.loadTournaments();
+      },
+      error: err => {
+        this.addingServer = false;
+        this.addServerError = err.error?.error ?? 'Failed to add server.';
+      }
+    });
+  }
+
+  removeServer(id: string): void {
+    if (this.removingServerId) return;
+    this.removingServerId = id;
+    this.tournamentServerService.remove(id).subscribe({
+      next: () => {
+        this.removingServerId = null;
+        this.servers = this.servers.filter(s => s.id !== id);
+        this.loadTournaments();
+      },
+      error: () => { this.removingServerId = null; }
+    });
+  }
+
   private loadTournaments(): void {
     this.tournamentService.list()
       .pipe(takeUntilDestroyed(this.destroyRef))

src/app/services/analysis.service.ts

@@ -0,0 +1,102 @@
+import { Injectable, inject } from '@angular/core';
+import { Observable, forkJoin, of } from 'rxjs';
+import { map, switchMap } from 'rxjs/operators';
+import { GameApiService } from './game-api.service';
+import { AnnotatedMove, AnalysisResponse, MoveQuality } from '../models/analysis.models';
+
+const DEFAULT_DEPTH = 14;
+
+@Injectable({ providedIn: 'root' })
+export class AnalysisService {
+  private readonly gameApi = inject(GameApiService);
+
+  analyzePosition(fen: string, depth = DEFAULT_DEPTH): Observable<AnalysisResponse> {
+    return this.gameApi.analyzePosition({ fen, depth });
+  }
+
+  /**
+   * Analyse a sequence of FEN positions (one per ply) and return annotated moves.
+   * fenHistory[0] is the starting position; fenHistory[n] is reached after move san[n-1].
+   */
+  analyzeGame(
+    sans: string[],
+    fenHistory: string[],
+    depth = DEFAULT_DEPTH,
+  ): Observable<AnnotatedMove[]> {
+    if (sans.length === 0 || fenHistory.length < 2) {
+      return of([]);
+    }
+
+    const requests = fenHistory.map((fen) => this.gameApi.analyzePosition({ fen, depth }));
+
+    return forkJoin(requests).pipe(
+      map((results) => this.buildAnnotations(sans, fenHistory, results)),
+    );
+  }
+
+  private buildAnnotations(
+    sans: string[],
+    fenHistory: string[],
+    results: AnalysisResponse[],
+  ): AnnotatedMove[] {
+    return sans.map((san, i) => {
+      const evalBefore = results[i]?.eval ?? null;
+      const winChanceBefore = results[i]?.winChance ?? null;
+      const evalAfter = results[i + 1]?.eval ?? null;
+      const winChanceAfter = results[i + 1]?.winChance ?? null;
+      const bestMove = results[i]?.bestMove ?? null;
+
+      const quality = this.classifyQuality(
+        evalBefore,
+        evalAfter,
+        winChanceBefore,
+        winChanceAfter,
+        san,
+        bestMove,
+      );
+
+      return {
+        san,
+        fen: fenHistory[i + 1] ?? fenHistory[i],
+        evalBefore,
+        evalAfter,
+        quality,
+        bestMove,
+        winChanceBefore,
+        winChanceAfter,
+      };
+    });
+  }
+
+  /**
+   * Classify move quality based on win-chance delta.
+   * Win-chance is from the engine's perspective (side to move before the move).
+   * After the move the side has flipped, so we invert the after value.
+   */
+  private classifyQuality(
+    _evalBefore: number | null,
+    _evalAfter: number | null,
+    winChanceBefore: number | null,
+    winChanceAfter: number | null,
+    san: string,
+    bestMove: string | null,
+  ): MoveQuality | null {
+    if (winChanceBefore === null || winChanceAfter === null) return null;
+
+    // The engine expresses win chance for the mover. After our move the mover
+    // has switched, so the opponent's win chance = winChanceAfter. Our remaining
+    // winning chance from our own perspective is 1 - winChanceAfter.
+    const wcAfterOurPerspective = 1 - winChanceAfter;
+    const delta = wcAfterOurPerspective - winChanceBefore; // negative = we lost win chance
+
+    if (bestMove && san === bestMove) {
+      if (delta >= -0.01) return 'brilliant';
+      return 'best';
+    }
+
+    if (delta >= -0.02) return 'good';
+    if (delta >= -0.05) return 'inaccuracy';
+    if (delta >= -0.1) return 'mistake';
+    return 'blunder';
+  }
+}

src/app/services/game-api.service.ts

@@ -9,6 +9,7 @@ import {
   LegalMovesResponse,
   PlayerInfo
 } from '../models/game.models';
+import { AnalysisRequest, AnalysisResponse } from '../models/analysis.models';
 import { StreamHandlerService } from './stream-handler.service';
 
 @Injectable({ providedIn: 'root' })
@@ -75,6 +76,10 @@ export class GameApiService {
     return this.http.post<void>(`${this.apiBase}${this.apiPath}/${gameId}/draw/offer`, {});
   }
 
+  analyzePosition(request: AnalysisRequest): Observable<AnalysisResponse> {
+    return this.http.post<AnalysisResponse>(`${this.apiBase}/api/analysis/position`, request);
+  }
+
   private resolveWsBase(): string {
     if (this.wsBase) {
       return this.wsBase;

src/app/services/official-bot.service.ts

@@ -0,0 +1,22 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable } from 'rxjs';
+
+export interface JoinTournamentResponse {
+  botId: string;
+  difficulty: string;
+  status: string;
+}
+
+@Injectable({ providedIn: 'root' })
+export class OfficialBotService {
+  private readonly http = inject(HttpClient);
+  private readonly base = '/api/bots/official';
+
+  joinTournament(tournamentId: string, difficulty: string): Observable<JoinTournamentResponse> {
+    return this.http.post<JoinTournamentResponse>(`${this.base}/join-tournament`, {
+      tournamentId,
+      difficulty,
+    });
+  }
+}

src/app/services/tournament-server.service.ts

@@ -0,0 +1,31 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable } from 'rxjs';
+
+export interface ExternalTournamentServer {
+  id: string;
+  label: string;
+  url: string;
+}
+
+export interface ExternalTournamentServerList {
+  servers: ExternalTournamentServer[];
+}
+
+@Injectable({ providedIn: 'root' })
+export class TournamentServerService {
+  private readonly http = inject(HttpClient);
+  private readonly base = '/api/tournament/servers';
+
+  list(): Observable<ExternalTournamentServerList> {
+    return this.http.get<ExternalTournamentServerList>(this.base);
+  }
+
+  register(label: string, url: string): Observable<ExternalTournamentServer> {
+    return this.http.post<ExternalTournamentServer>(this.base, { label, url });
+  }
+
+  remove(id: string): Observable<void> {
+    return this.http.delete<void>(`${this.base}/${id}`);
+  }
+}