From d4279f2e3b2e3ee62411a1f0b0f067b677dd912b Mon Sep 17 00:00:00 2001
From: gahusb <bgg8988@gmail.com>
Date: Mon, 27 Apr 2026 08:29:02 +0900
Subject: [PATCH] refactor(agent-office): rewrite OfficeRenderer with game
 loop, zoom/pan, Y-sorting

---
 .../agent-office/canvas/OfficeRenderer.js     | 533 ++++++++++++------
 .../agent-office/canvas/OverlayRenderer.js    |  59 ++
 2 files changed, 414 insertions(+), 178 deletions(-)
 create mode 100644 src/pages/agent-office/canvas/OverlayRenderer.js

diff --git a/src/pages/agent-office/canvas/OfficeRenderer.js b/src/pages/agent-office/canvas/OfficeRenderer.js
index c98adc4..7cc0370 100644
--- a/src/pages/agent-office/canvas/OfficeRenderer.js
+++ b/src/pages/agent-office/canvas/OfficeRenderer.js
@@ -1,38 +1,300 @@
-import { drawTileMap } from './TileMap';
-import { AgentSprite } from './AgentSprite';
-import { getCharLabel, drawNotificationBadge } from './SpriteSheet';
+// src/pages/agent-office/canvas/OfficeRenderer.js
 
-const STATUS_ICONS = {
-  idle: null,
-  working: null,
-  waiting: '❗',
-  reporting: '📋',
-  break: '☕',
+import mapData from '../assets/office-map.json';
+import { TileMap } from './TileMap.js';
+import { FurnitureRenderer } from './FurnitureRenderer.js';
+import { Pathfinder } from './Pathfinder.js';
+import { OverlayRenderer } from './OverlayRenderer.js';
+import { getTheme } from './themes.js';
+
+// AgentSprite is implemented in Phase 2.
+// Until then, use a minimal stub that satisfies the interface expected by OfficeRenderer.
+let AgentSprite;
+try {
+  // Dynamic import fallback — wrapping in try/catch for bundler compatibility
+  AgentSprite = null; // will be set below
+} catch (_) {}
+
+/** Phase 2 stub for AgentSprite */
+class _AgentSpriteStub {
+  constructor(id, meta, col, row /*, pathfinder */) {
+    this.id = id;
+    this.meta = meta;
+    this.x = col;
+    this.y = row;
+    this.deskCol = col;
+    this.deskRow = row;
+    this.state = 'idle';
+    this.detail = '';
+    this.notificationCount = 0;
+    this._animTimer = 0;
+    this._bobOffset = 0;
+  }
+
+  onStateChange(state, detail /*, waypoints */) {
+    this.state = state;
+    this.detail = detail || '';
+  }
+
+  update(dt) {
+    this._animTimer += dt;
+    this._bobOffset = Math.sin(this._animTimer * 2) * 2;
+  }
+
+  draw(ctx, scale, offsetX, offsetY, tileSize) {
+    const ts = tileSize * scale;
+    const cx = this.x * ts + offsetX + ts / 2;
+    const cy = this.y * ts + offsetY + ts / 2 + this._bobOffset * scale;
+    const r = ts * 0.35;
+
+    // Simple circle avatar
+    ctx.save();
+    ctx.beginPath();
+    ctx.arc(cx, cy, r, 0, Math.PI * 2);
+    ctx.fillStyle = this.meta.color || '#8b5cf6';
+    ctx.fill();
+    ctx.strokeStyle = 'rgba(255,255,255,0.4)';
+    ctx.lineWidth = scale;
+    ctx.stroke();
+
+    // Emoji label
+    ctx.font = `${Math.max(10, ts * 0.4)}px serif`;
+    ctx.textAlign = 'center';
+    ctx.textBaseline = 'middle';
+    ctx.fillText(this.meta.emoji || '?', cx, cy);
+
+    // State indicator dot
+    const stateColors = {
+      idle: '#6b7280',
+      working: '#22c55e',
+      waiting: '#f59e0b',
+      reporting: '#3b82f6',
+      break: '#f97316'
+    };
+    const dotColor = stateColors[this.state] || '#6b7280';
+    ctx.beginPath();
+    ctx.arc(cx + r * 0.7, cy - r * 0.7, r * 0.25, 0, Math.PI * 2);
+    ctx.fillStyle = dotColor;
+    ctx.fill();
+
+    ctx.restore();
+  }
+}
+
+// Use the stub until Phase 2 provides a real AgentSprite
+AgentSprite = _AgentSpriteStub;
+
+const AGENT_META = {
+  stock:      { displayName: '주식 트레이더', emoji: '📈', color: '#4488cc' },
+  music:      { displayName: '음악 프로듀서', emoji: '🎵', color: '#44aa88' },
+  blog:       { displayName: '블로그 마케터', emoji: '✍️', color: '#d97706' },
+  realestate: { displayName: '청약 애널리스트', emoji: '🏢', color: '#c026d3' },
+  lotto:      { displayName: '로또 큐레이터', emoji: '🎱', color: '#ef4444' }
 };
 
 export class OfficeRenderer {
-  constructor(canvas, mapData) {
+  constructor(canvas) {
     this.canvas = canvas;
     this.ctx = canvas.getContext('2d');
-    this.mapData = mapData;
-    this.renderInfo = null;
-    this.agents = {};
-    this._animId = null;
-    this._onClick = null;
-    this._onCeoClick = null;
-    this._ceoDocBadge = 0;
 
-    const agentIds = ['stock', 'music', 'blog', 'realestate'];
-    for (const id of agentIds) {
-      this.agents[id] = new AgentSprite(id, mapData.waypoints);
+    // 맵 & 렌더러
+    this.tileMap = new TileMap(mapData);
+    this.furnitureRenderer = new FurnitureRenderer(mapData.furniture, mapData.tileSize);
+    this.pathfinder = new Pathfinder(mapData.cols, mapData.rows);
+    this.overlayRenderer = new OverlayRenderer();
+
+    // blocked 타일 설정
+    this.pathfinder.setWalls(mapData.floor);
+    this.pathfinder.setBlocked(mapData.blocked);
+
+    // 테마 & 뷰포트
+    this.theme = getTheme(
+      (typeof localStorage !== 'undefined' && localStorage.getItem('agent-office-theme')) || 'modern'
+    );
+    this.zoom = 2;
+    this.panX = 0;
+    this.panY = 0;
+    this._isPanning = false;
+    this._panStart = { x: 0, y: 0 };
+
+    // 에이전트
+    this.agents = new Map();
+    this._initAgents();
+
+    // 게임 루프
+    this._lastTime = 0;
+    this._animId = null;
+
+    // 이벤트
+    this._setupInputHandlers();
+  }
+
+  _initAgents() {
+    for (const [id, meta] of Object.entries(AGENT_META)) {
+      const waypoint = mapData.waypoints[`desk_${id}`];
+      if (!waypoint) continue;
+      const sprite = new AgentSprite(id, meta, waypoint.col, waypoint.row, this.pathfinder);
+      sprite.deskCol = waypoint.col;
+      sprite.deskRow = waypoint.row;
+      this.agents.set(id, sprite);
     }
   }
 
-  start() {
-    this._loop = this._loop.bind(this);
-    this._animId = requestAnimationFrame(this._loop);
+  /** 줌/팬/클릭 이벤트 핸들러 */
+  _setupInputHandlers() {
+    // 마우스 휠 줌
+    this.canvas.addEventListener('wheel', (e) => {
+      e.preventDefault();
+      const oldZoom = this.zoom;
+      if (e.deltaY < 0) {
+        this.zoom = Math.min(this.zoom + 0.5, 4);
+      } else {
+        this.zoom = Math.max(this.zoom - 0.5, 1);
+      }
+      // 마우스 위치 기준 줌
+      if (this.zoom !== oldZoom) {
+        const rect = this.canvas.getBoundingClientRect();
+        const mx = e.clientX - rect.left;
+        const my = e.clientY - rect.top;
+        const ratio = this.zoom / oldZoom;
+        this.panX = mx - (mx - this.panX) * ratio;
+        this.panY = my - (my - this.panY) * ratio;
+      }
+    }, { passive: false });
+
+    // 마우스 드래그 패닝
+    this.canvas.addEventListener('mousedown', (e) => {
+      if (e.button === 0) {
+        this._isPanning = true;
+        this._panStart = { x: e.clientX - this.panX, y: e.clientY - this.panY };
+      }
+    });
+    this._onMouseMove = (e) => {
+      if (this._isPanning) {
+        this.panX = e.clientX - this._panStart.x;
+        this.panY = e.clientY - this._panStart.y;
+      }
+    };
+    this._onMouseUp = () => {
+      this._isPanning = false;
+    };
+    window.addEventListener('mousemove', this._onMouseMove);
+    window.addEventListener('mouseup', this._onMouseUp);
+
+    // 터치 (모바일)
+    let lastTouchDist = 0;
+    let lastTouchCenter = { x: 0, y: 0 };
+    this.canvas.addEventListener('touchstart', (e) => {
+      if (e.touches.length === 1) {
+        this._isPanning = true;
+        this._panStart = { x: e.touches[0].clientX - this.panX, y: e.touches[0].clientY - this.panY };
+      } else if (e.touches.length === 2) {
+        this._isPanning = false;
+        const dx = e.touches[0].clientX - e.touches[1].clientX;
+        const dy = e.touches[0].clientY - e.touches[1].clientY;
+        lastTouchDist = Math.hypot(dx, dy);
+        lastTouchCenter = {
+          x: (e.touches[0].clientX + e.touches[1].clientX) / 2,
+          y: (e.touches[0].clientY + e.touches[1].clientY) / 2
+        };
+      }
+    }, { passive: false });
+    this.canvas.addEventListener('touchmove', (e) => {
+      e.preventDefault();
+      if (e.touches.length === 1 && this._isPanning) {
+        this.panX = e.touches[0].clientX - this._panStart.x;
+        this.panY = e.touches[0].clientY - this._panStart.y;
+      } else if (e.touches.length === 2) {
+        const dx = e.touches[0].clientX - e.touches[1].clientX;
+        const dy = e.touches[0].clientY - e.touches[1].clientY;
+        const dist = Math.hypot(dx, dy);
+        const oldZoom = this.zoom;
+        this.zoom = Math.min(4, Math.max(1, this.zoom * (dist / lastTouchDist)));
+        lastTouchDist = dist;
+        const rect = this.canvas.getBoundingClientRect();
+        const cx = lastTouchCenter.x - rect.left;
+        const cy = lastTouchCenter.y - rect.top;
+        const ratio = this.zoom / oldZoom;
+        this.panX = cx - (cx - this.panX) * ratio;
+        this.panY = cy - (cy - this.panY) * ratio;
+      }
+    }, { passive: false });
+    this.canvas.addEventListener('touchend', () => {
+      this._isPanning = false;
+    });
   }
 
+  /** 클릭 히트 테스트 — AgentOffice에서 호출 */
+  hitTest(clientX, clientY) {
+    const rect = this.canvas.getBoundingClientRect();
+    const screenX = clientX - rect.left;
+    const screenY = clientY - rect.top;
+    const { col, row } = this.tileMap.screenToTile(screenX, screenY, this.zoom, this.panX, this.panY);
+
+    // 에이전트 히트 (역순, 최상위 우선)
+    for (const [id, sprite] of [...this.agents.entries()].reverse()) {
+      const dx = Math.abs(sprite.x - col);
+      const dy = Math.abs(sprite.y - row);
+      if (dx < 1.2 && dy < 1.5) {
+        return { type: 'agent', id };
+      }
+    }
+    return { type: 'empty' };
+  }
+
+  /** 에이전트 상태 업데이트 (WebSocket에서 호출) */
+  updateAgentState(agentId, state, detail) {
+    const sprite = this.agents.get(agentId);
+    if (!sprite) return;
+    if (typeof sprite.onStateChange === 'function') {
+      sprite.onStateChange(state, detail, mapData.waypoints);
+    } else {
+      sprite.state = state;
+      sprite.detail = detail || '';
+    }
+  }
+
+  /** 에이전트 알림 배지 설정 */
+  setAgentNotification(agentId, count) {
+    const sprite = this.agents.get(agentId);
+    if (sprite) sprite.notificationCount = count;
+  }
+
+  /** 테마 변경 */
+  setTheme(themeName) {
+    this.theme = getTheme(themeName);
+    if (typeof localStorage !== 'undefined') {
+      localStorage.setItem('agent-office-theme', themeName);
+    }
+  }
+
+  /** 줌 레벨 설정 */
+  setZoom(level) {
+    const cx = this.canvas.width / 2;
+    const cy = this.canvas.height / 2;
+    const oldZoom = this.zoom;
+    this.zoom = Math.min(4, Math.max(1, level));
+    const ratio = this.zoom / oldZoom;
+    this.panX = cx - (cx - this.panX) * ratio;
+    this.panY = cy - (cy - this.panY) * ratio;
+  }
+
+  /** 카메라를 맵 중앙에 맞추기 */
+  centerCamera() {
+    const mapW = mapData.cols * mapData.tileSize * this.zoom;
+    const mapH = mapData.rows * mapData.tileSize * this.zoom;
+    this.panX = (this.canvas.clientWidth - mapW) / 2;
+    this.panY = (this.canvas.clientHeight - mapH) / 2;
+  }
+
+  /** 게임 루프 시작 */
+  start() {
+    this.centerCamera();
+    this._lastTime = performance.now();
+    this._loop(this._lastTime);
+  }
+
+  /** 게임 루프 중지 */
   stop() {
     if (this._animId) {
       cancelAnimationFrame(this._animId);
@@ -40,172 +302,87 @@ export class OfficeRenderer {
     }
   }
 
-  resize(width, height) {
-    this.canvas.width = width;
-    this.canvas.height = height;
-  }
-
-  setOnClick(handler) {
-    this._onClick = handler;
-  }
-
-  handleClick(canvasX, canvasY) {
-    if (!this.renderInfo) return null;
-
-    for (const [id, sprite] of Object.entries(this.agents)) {
-      if (sprite.hitTest(canvasX, canvasY, this.renderInfo)) {
-        if (this._onClick) this._onClick(id);
-        return id;
-      }
-    }
-    // CEO desk click detection
-    const ceo = this.mapData.waypoints.ceo_desk;
-    if (ceo) {
-      const { scale, offsetX, offsetY, tileSize } = this.renderInfo;
-      const cx = offsetX + ceo.x * tileSize * scale;
-      const cy = offsetY + ceo.y * tileSize * scale;
-      const hitW = 5 * tileSize * scale;
-      const hitH = 2 * tileSize * scale;
-      if (canvasX >= cx - tileSize * scale && canvasY >= cy - tileSize * scale &&
-          canvasX <= cx + hitW && canvasY <= cy + hitH) {
-        if (this._onCeoClick) this._onCeoClick();
-        return 'ceo_desk';
-      }
-    }
-
-    return null;
-  }
-
-  updateAgentState(agentId, state, detail) {
-    const sprite = this.agents[agentId];
-    if (sprite) {
-      sprite.setState(state, detail);
-      if (state === 'idle' || state === 'working' || state === 'waiting') {
-        sprite.moveToDesk();
-      }
-    }
-  }
-
-  moveAgent(agentId, target) {
-    const sprite = this.agents[agentId];
-    if (sprite) {
-      sprite.moveTo(target);
-    }
-  }
-
-  setOnCeoClick(handler) {
-    this._onCeoClick = handler;
-  }
-
-  setCeoDocBadge(count) {
-    this._ceoDocBadge = count;
-  }
-
-  setAgentNotification(agentId, count) {
-    const sprite = this.agents[agentId];
-    if (sprite) sprite.setNotification(count);
-  }
-
   _loop(timestamp) {
-    const { ctx, canvas, mapData } = this;
+    const dt = Math.min((timestamp - this._lastTime) / 1000, 0.1); // cap dt to avoid spiral
+    this._lastTime = timestamp;
 
-    ctx.clearRect(0, 0, canvas.width, canvas.height);
-    ctx.fillStyle = '#1a1a2e';
-    ctx.fillRect(0, 0, canvas.width, canvas.height);
+    this._update(dt);
+    this._render();
 
-    this.renderInfo = drawTileMap(ctx, mapData, canvas.width, canvas.height);
-
-    const now = Date.now();
-    for (const sprite of Object.values(this.agents)) {
-      sprite.update(now);
-      sprite.draw(ctx, this.renderInfo);
-    }
-
-    for (const [id, sprite] of Object.entries(this.agents)) {
-      this._drawOverlay(ctx, sprite, id);
-    }
-
-    // CEO desk document icon
-    this._drawCeoDoc(ctx);
-
-    this._animId = requestAnimationFrame(this._loop);
+    this._animId = requestAnimationFrame((t) => this._loop(t));
   }
 
-  _drawOverlay(ctx, sprite, agentId) {
-    if (!this.renderInfo) return;
-    const { scale, offsetX, offsetY, tileSize } = this.renderInfo;
-    const cx = offsetX + sprite.x * tileSize * scale + (tileSize * scale) / 2;
-    const cy = offsetY + sprite.y * tileSize * scale - 10 * scale;
-
-    const icon = STATUS_ICONS[sprite.state];
-    if (icon) {
-      ctx.font = `${14 * scale}px serif`;
-      ctx.textAlign = 'center';
-      ctx.fillText(icon, cx, cy - 15 * scale);
-    }
-
-    // Notification badge (separate from status icon)
-    if (sprite.notificationCount > 0) {
-      drawNotificationBadge(ctx, cx, cy - 15 * scale, sprite.notificationCount, scale * 1.5);
-    }
-
-    ctx.fillStyle = 'rgba(255,255,255,0.7)';
-    ctx.font = `${8 * scale}px monospace`;
-    ctx.textAlign = 'center';
-    ctx.fillText(getCharLabel(agentId), cx, cy + 30 * scale + 30);
-
-    if (sprite.detail && (sprite.state === 'working' || sprite.state === 'waiting')) {
-      const bubbleY = cy - 25 * scale;
-      ctx.fillStyle = 'rgba(0,0,0,0.7)';
-      const textW = ctx.measureText(sprite.detail).width;
-      ctx.fillRect(cx - textW / 2 - 6, bubbleY - 10, textW + 12, 16);
-      ctx.fillStyle = '#fff';
-      ctx.font = `${7 * scale}px monospace`;
-      ctx.fillText(sprite.detail, cx, bubbleY);
+  _update(dt) {
+    for (const sprite of this.agents.values()) {
+      if (typeof sprite.update === 'function') {
+        sprite.update(dt);
+      }
     }
   }
 
-  _drawCeoDoc(ctx) {
-    if (!this.renderInfo) return;
-    const ceo = this.mapData.waypoints.ceo_desk;
-    if (!ceo) return;
+  _render() {
+    const ctx = this.ctx;
+    const dpr = window.devicePixelRatio || 1;
 
-    const { scale, offsetX, offsetY, tileSize } = this.renderInfo;
-    const dx = offsetX + (ceo.x - 1) * tileSize * scale;
-    const dy = offsetY + (ceo.y - 1) * tileSize * scale;
-    const docW = 12 * scale;
-    const docH = 16 * scale;
-
-    // Paper
-    ctx.fillStyle = '#e8e0d0';
-    ctx.fillRect(dx, dy, docW, docH);
-    // Lines on paper
-    ctx.fillStyle = '#bbb';
-    for (let i = 0; i < 4; i++) {
-      ctx.fillRect(dx + 2 * scale, dy + (3 + i * 3) * scale, 8 * scale, 1);
+    // 캔버스 크기 조정
+    const displayW = this.canvas.clientWidth;
+    const displayH = this.canvas.clientHeight;
+    if (this.canvas.width !== displayW * dpr || this.canvas.height !== displayH * dpr) {
+      this.canvas.width = displayW * dpr;
+      this.canvas.height = displayH * dpr;
+      ctx.scale(dpr, dpr);
     }
-    // Folded corner
-    ctx.fillStyle = '#d0c8b8';
-    ctx.beginPath();
-    ctx.moveTo(dx + docW - 3 * scale, dy);
-    ctx.lineTo(dx + docW, dy + 3 * scale);
-    ctx.lineTo(dx + docW - 3 * scale, dy + 3 * scale);
-    ctx.fill();
 
-    // Badge on document
-    if (this._ceoDocBadge > 0) {
-      const bx = dx + docW;
-      const by = dy;
-      const r = 4 * scale;
-      ctx.beginPath();
-      ctx.arc(bx, by, r, 0, Math.PI * 2);
-      ctx.fillStyle = '#f43f5e';
-      ctx.fill();
-      ctx.fillStyle = '#fff';
-      ctx.font = `bold ${5 * scale}px monospace`;
-      ctx.textAlign = 'center';
-      ctx.textBaseline = 'middle';
-      ctx.fillText(this._ceoDocBadge > 9 ? '9+' : String(this._ceoDocBadge), bx, by);
+    ctx.imageSmoothingEnabled = false;
+    ctx.clearRect(0, 0, displayW, displayH);
+
+    // 배경
+    ctx.fillStyle = this.theme.wall.color;
+    ctx.fillRect(0, 0, displayW, displayH);
+
+    // 1. 타일맵 (바닥 + 벽)
+    this.tileMap.render(ctx, this.theme, this.zoom, this.panX, this.panY);
+
+    // 2. Y-sorted: 가구 + 에이전트
+    const renderables = [];
+
+    // 가구
+    const furnitureItems = this.furnitureRenderer.getRenderables(this.theme, this.zoom, this.panX, this.panY);
+    renderables.push(...furnitureItems);
+
+    // 에이전트
+    for (const sprite of this.agents.values()) {
+      if (typeof sprite.draw === 'function') {
+        renderables.push({
+          zY: sprite.y,
+          draw: (ctx2) => sprite.draw(ctx2, this.zoom, this.panX, this.panY, mapData.tileSize)
+        });
+      }
     }
+
+    // Y좌표 정렬
+    renderables.sort((a, b) => a.zY - b.zY);
+    for (const item of renderables) {
+      item.draw(ctx);
+    }
+
+    // 3. 오버레이 (항상 최상위)
+    for (const sprite of this.agents.values()) {
+      if (this.overlayRenderer && typeof this.overlayRenderer.draw === 'function') {
+        this.overlayRenderer.draw(ctx, sprite, this.theme, this.zoom, this.panX, this.panY, mapData.tileSize);
+      }
+    }
+  }
+
+  /** 리사이즈 처리 */
+  resize() {
+    // 다음 프레임에서 자동 조정됨 (_render에서 크기 체크)
+  }
+
+  destroy() {
+    this.stop();
+    // window 이벤트 리스너 정리
+    if (this._onMouseMove) window.removeEventListener('mousemove', this._onMouseMove);
+    if (this._onMouseUp) window.removeEventListener('mouseup', this._onMouseUp);
   }
 }
diff --git a/src/pages/agent-office/canvas/OverlayRenderer.js b/src/pages/agent-office/canvas/OverlayRenderer.js
new file mode 100644
index 0000000..58d9a0d
--- /dev/null
+++ b/src/pages/agent-office/canvas/OverlayRenderer.js
@@ -0,0 +1,59 @@
+// src/pages/agent-office/canvas/OverlayRenderer.js
+// Phase 3 stub — full implementation in Phase 3
+
+/**
+ * 오버레이 렌더러 (Phase 3에서 구현)
+ * 에이전트 위의 상태 아이콘, 이름 레이블, 알림 배지, 말풍선 등
+ */
+export class OverlayRenderer {
+  /**
+   * 에이전트 오버레이 렌더링
+   * @param {CanvasRenderingContext2D} ctx
+   * @param {object} sprite - AgentSprite 인스턴스
+   * @param {object} theme - 테마 객체
+   * @param {number} scale - 줌 레벨
+   * @param {number} offsetX - 패닝 X
+   * @param {number} offsetY - 패닝 Y
+   * @param {number} tileSize - 타일 크기
+   */
+  draw(ctx, sprite, theme, scale, offsetX, offsetY, tileSize) {
+    // Phase 3에서 구현 예정
+    // 현재는 기본 레이블만 표시
+    if (!sprite || sprite.x == null) return;
+
+    const ts = tileSize * scale;
+    const cx = sprite.x * ts + offsetX + ts / 2;
+    const cy = sprite.y * ts + offsetY;
+
+    // 에이전트 이름 레이블
+    if (sprite.meta && sprite.meta.displayName) {
+      ctx.save();
+      ctx.font = `${Math.max(8, 9 * scale)}px monospace`;
+      ctx.textAlign = 'center';
+      ctx.fillStyle = theme.text.secondary;
+      ctx.fillText(sprite.meta.displayName, cx, cy - 4 * scale);
+      ctx.restore();
+    }
+
+    // 알림 배지
+    if (sprite.notificationCount > 0) {
+      const bx = cx + ts * 0.3;
+      const by = cy - ts * 0.5;
+      const r = Math.max(5, 6 * scale);
+      ctx.save();
+      ctx.beginPath();
+      ctx.arc(bx, by, r, 0, Math.PI * 2);
+      ctx.fillStyle = '#ef4444';
+      ctx.fill();
+      ctx.fillStyle = '#ffffff';
+      ctx.font = `bold ${Math.max(7, 7 * scale)}px monospace`;
+      ctx.textAlign = 'center';
+      ctx.textBaseline = 'middle';
+      ctx.fillText(
+        sprite.notificationCount > 9 ? '9+' : String(sprite.notificationCount),
+        bx, by
+      );
+      ctx.restore();
+    }
+  }
+}