feat: Agent Office — AI 에이전트 가상 오피스 (#2)

## Summary
- Canvas 2D 픽셀아트 오피스 렌더링 (SpriteSheet + TileMap + AgentSprite)
- WebSocket 실시간 에이전트 상태 동기화 (useAgentManager)
- ChatPanel (명령/승인) + TaskHistory (작업 이력) UI
- 다크 테마 + glassmorphism 패널

## Changes (7 commits)
- API helpers + route + Lab entry
- Canvas engine: SpriteSheet, TileMap, AgentSprite, OfficeRenderer
- React hooks: useAgentManager, useOfficeCanvas
- Components: ChatPanel, TaskHistory
- Main page + CSS
- Code review fixes: claude agent 참조 제거, rejected 배지 추가

Reviewed-on: #2

src/pages/agent-office/canvas/OfficeRenderer.js

@@ -0,0 +1,129 @@
+import { drawTileMap } from './TileMap';
+import { AgentSprite } from './AgentSprite';
+import { getCharLabel } from './SpriteSheet';
+
+const STATUS_ICONS = {
+  idle: null,
+  working: null,
+  waiting: '❗',
+  reporting: '📋',
+  break: '☕',
+};
+
+export class OfficeRenderer {
+  constructor(canvas, mapData) {
+    this.canvas = canvas;
+    this.ctx = canvas.getContext('2d');
+    this.mapData = mapData;
+    this.renderInfo = null;
+    this.agents = {};
+    this._animId = null;
+    this._onClick = null;
+
+    const agentIds = ['stock', 'music'];
+    for (const id of agentIds) {
+      this.agents[id] = new AgentSprite(id, mapData.waypoints);
+    }
+  }
+
+  start() {
+    this._loop = this._loop.bind(this);
+    this._animId = requestAnimationFrame(this._loop);
+  }
+
+  stop() {
+    if (this._animId) {
+      cancelAnimationFrame(this._animId);
+      this._animId = null;
+    }
+  }
+
+  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;
+      }
+    }
+    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);
+    }
+  }
+
+  _loop(timestamp) {
+    const { ctx, canvas, mapData } = this;
+
+    ctx.clearRect(0, 0, canvas.width, canvas.height);
+    ctx.fillStyle = '#1a1a2e';
+    ctx.fillRect(0, 0, canvas.width, canvas.height);
+
+    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);
+    }
+
+    this._animId = requestAnimationFrame(this._loop);
+  }
+
+  _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 = `${14 * scale}px serif`;
+      ctx.textAlign = 'center';
+      ctx.fillText(icon, cx, cy - 15 * scale);
+    }
+
+    ctx.fillStyle = 'rgba(255,255,255,0.7)';
+    ctx.font = `${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);
+    }
+  }
+}