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/services/employee_behavior_profile_service.py

@@ -466,7 +466,9 @@ class EmployeeBehaviorProfileService(EmployeeBehaviorProfileMetricHelpers):
             tool for tool in tool_calls if str(tool.status or "").lower() not in {"success", "ok"}
         ]
         estimated_tokens = self._estimate_tokens(runs)
-        duration_ms = self._sum_agent_run_duration_ms(runs)
+        usage_duration_metrics = self._resolve_usage_duration_metrics(
+            context["employee_identifiers"], context["cutoff"], runs
+        )
         override_score = 0
 
         token_mode = "estimated_token_count" if estimated_tokens else "unavailable"
@@ -525,8 +527,7 @@ class EmployeeBehaviorProfileService(EmployeeBehaviorProfileMetricHelpers):
                 "token_count_mode": token_mode,
                 "estimated_token_count": estimated_tokens,
                 "exact_token_count": None,
-                "ai_run_duration_ms": duration_ms,
-                "ai_run_duration_mode": "elapsed_or_tool_call_fallback",
+                **usage_duration_metrics,
             },
         )
 
@@ -688,7 +689,11 @@ class EmployeeBehaviorProfileService(EmployeeBehaviorProfileMetricHelpers):
             expense_score=expense_score,
             process_score=process_score,
         )
-        profile_payloads = build_profile_payloads(rows)
+        profile_payloads = self._merge_live_usage_duration_metrics(
+            build_profile_payloads(rows),
+            self._employee_identifiers(employee),
+            datetime.now(UTC) - timedelta(days=window_days),
+        )
         profile_tags = build_profile_tags(profile_payloads, scene=scene)
         radar = build_profile_radar(profile_payloads, profile_tags, scene=scene)