重构 API 路由并新增工作流编排功能

后端：
- 重构 agents, heartbeats, locks, meetings, resources, roles, workflows 路由
- 新增 orchestrator 和 providers 路由
- 新增 CLI 调用器和流程编排服务
- 添加日志配置和依赖项

前端：
- 更新 AgentsPage、SettingsPage、WorkflowPage 页面
- 扩展 api.ts 新增 API 接口

其他：
- 清理测试 agent 数据文件
- 新增示例工作流和项目审计报告

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

backend/app/routers/orchestrator.py

@@ -0,0 +1,57 @@
+"""
+工作流编排器 API
+
+提供启动自动工作流、查看运行状态的端点
+"""
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+from typing import Dict, Optional
+
+from ..services.workflow_orchestrator import get_workflow_orchestrator
+
+router = APIRouter(prefix="/orchestrator", tags=["orchestrator"])
+
+
+class StartWorkflowRequest(BaseModel):
+    """启动工作流请求"""
+    workflow_path: str  # YAML 文件名，如 dinner-decision.yaml
+    agent_overrides: Optional[Dict[str, str]] = None  # agent_id → model 覆盖
+
+
+@router.post("/start")
+async def start_workflow(request: StartWorkflowRequest):
+    """启动一个工作流的自动编排（后台异步执行）"""
+    orchestrator = get_workflow_orchestrator()
+    try:
+        run = await orchestrator.start_workflow(
+            workflow_path=request.workflow_path,
+            agent_overrides=request.agent_overrides,
+        )
+        return {
+            "success": True,
+            "message": f"工作流已启动: {run.workflow_name}",
+            "run_id": run.run_id,
+            "workflow_id": run.workflow_id,
+        }
+    except FileNotFoundError:
+        raise HTTPException(status_code=404, detail=f"工作流文件不存在: {request.workflow_path}")
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get("/runs")
+async def list_runs():
+    """列出所有编排运行"""
+    orchestrator = get_workflow_orchestrator()
+    return {"runs": orchestrator.list_runs()}
+
+
+@router.get("/runs/{run_id}")
+async def get_run(run_id: str):
+    """获取指定运行的详细状态"""
+    orchestrator = get_workflow_orchestrator()
+    run = orchestrator.get_run(run_id)
+    if not run:
+        raise HTTPException(status_code=404, detail=f"运行不存在: {run_id}")
+    return run.to_dict()