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。

web/tests/risk-observation-evidence-card.test.mjs

@@ -0,0 +1,42 @@
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import test from 'node:test'
+import { fileURLToPath } from 'node:url'
+
+const component = readFileSync(
+  fileURLToPath(new URL('../src/components/travel/RiskObservationEvidenceCard.vue', import.meta.url)),
+  'utf8'
+)
+const styles = readFileSync(
+  fileURLToPath(
+    new URL('../src/assets/styles/components/risk-observation-evidence-card.css', import.meta.url)
+  ),
+  'utf8'
+)
+
+test('risk observation evidence card supports switching active observation details', () => {
+  assert.match(component, /当前风险观察详情/)
+  assert.match(component, /const detailRegionId = 'risk-observation-active-detail'/)
+  assert.match(component, /:aria-controls="detailRegionId"/)
+  assert.match(component, /:aria-pressed="isActiveObservation\(item, index\)"/)
+  assert.match(component, /@click="selectObservation\(item, index\)"/)
+  assert.match(component, /const feedbackRows = computed/)
+  assert.match(component, /反馈历史/)
+  assert.match(styles, /\.risk-evidence-current-head/)
+  assert.match(styles, /\.risk-observation-row:focus-visible/)
+})
+
+test('risk observation evidence card remains scoped to current claim data', () => {
+  assert.match(component, /fetchClaimRiskObservations\(claimId\)/)
+  assert.doesNotMatch(component, /fetchEmployeeProfile/)
+  assert.doesNotMatch(component, /employeeBehaviorProfile/)
+  assert.doesNotMatch(component, /KnowledgeIngestGraphView/)
+  assert.doesNotMatch(component, /LightRAG/)
+})
+
+test('risk observation evidence card keeps empty observation state out of main flow', () => {
+  assert.match(component, /const visible = computed/)
+  assert.match(component, /observations\.value\.length > 0/)
+  assert.match(component, /暂无证据明细。/)
+  assert.match(component, /暂无人工反馈。/)
+})