feat: 新增风险图谱算法与系统仪表盘及操作反馈体系

后端新增风险图谱算法模块、风险观察与反馈服务、规则 DSL
校验器和可解释性引擎，完善系统仪表盘和财务仪表盘统计，
优化 agent 运行和编排执行链路，清理旧开发文档，前端新增
系统趋势、负载热力图等多种仪表盘图表组件，完善操作反馈
对话框和工作台日期选择器，优化报销创建和审批详情交互，
补充单元测试覆盖。

server/src/app/api/v1/endpoints/agent_runs.py

@@ -6,7 +6,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query, status
 from sqlalchemy.orm import Session
 
 from app.api.deps import get_db
-from app.schemas.agent_run import AgentRunRead
+from app.schemas.agent_run import AgentRunRead, AgentRunStatsRead
 from app.schemas.common import ErrorResponse
 from app.services.agent_runs import AgentRunService
 
@@ -44,6 +44,39 @@ def list_agent_runs(
     )
 
 
+@router.get(
+    "/summary",
+    response_model=AgentRunStatsRead,
+    summary="查询 Agent 运行统计",
+    description="按最近运行记录实时汇总 Agent、工具调用、模型调用和错误统计。",
+)
+def summarize_agent_runs(
+    db: DbSession,
+    agent: Annotated[
+        str | None,
+        Query(description="Agent 名称筛选。"),
+    ] = None,
+    status_value: Annotated[
+        str | None,
+        Query(alias="status", description="运行状态筛选。"),
+    ] = None,
+    source: Annotated[
+        str | None,
+        Query(description="运行来源筛选。"),
+    ] = None,
+    limit: Annotated[
+        int,
+        Query(ge=1, le=500, description="统计最近记录数。"),
+    ] = 200,
+) -> AgentRunStatsRead:
+    return AgentRunService(db).summarize_runs(
+        agent=agent,
+        status=status_value,
+        source=source,
+        limit=limit,
+    )
+
+
 @router.get(
     "/{run_id}",
     response_model=AgentRunRead,