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/assets/office-map.json

@@ -0,0 +1,45 @@
+{
+  "tileSize": 32,
+  "cols": 20,
+  "rows": 14,
+  "layers": {
+    "floor": [
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [2,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [2,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [2,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
+      [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
+    ]
+  },
+  "furniture": [
+    {"type": "desk", "x": 2, "y": 1, "label": "Stock"},
+    {"type": "desk", "x": 7, "y": 1, "label": "Music"},
+    {"type": "desk", "x": 12, "y": 1, "label": "Claude"},
+    {"type": "desk", "x": 17, "y": 1, "label": "(빈)"},
+    {"type": "table", "x": 8, "y": 6, "w": 4, "h": 2, "label": "회의 테이블"},
+    {"type": "sofa", "x": 1, "y": 10, "label": "휴게실"},
+    {"type": "coffee", "x": 3, "y": 10, "label": "☕"},
+    {"type": "desk", "x": 14, "y": 10, "w": 5, "h": 2, "label": "CEO"}
+  ],
+  "waypoints": {
+    "stock_desk": {"x": 2, "y": 2},
+    "music_desk": {"x": 7, "y": 2},
+    "claude_desk": {"x": 12, "y": 2},
+    "meeting_table": {"x": 9, "y": 7},
+    "break_room": {"x": 2, "y": 11},
+    "ceo_desk": {"x": 16, "y": 11}
+  },
+  "colors": {
+    "1": "#3a3a50",
+    "2": "#4a3a2a"
+  }
+}