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-dashboard.test.mjs

@@ -0,0 +1,77 @@
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import test from 'node:test'
+import { fileURLToPath } from 'node:url'
+
+import { normalizeRiskObservationDashboard } from '../src/services/riskObservations.js'
+
+const dashboardComponent = readFileSync(
+  fileURLToPath(new URL('../src/components/dashboard/RiskObservationDashboard.vue', import.meta.url)),
+  'utf8'
+)
+const overviewViewModel = readFileSync(
+  fileURLToPath(new URL('../src/composables/useOverviewView.js', import.meta.url)),
+  'utf8'
+)
+const overviewTemplate = readFileSync(
+  fileURLToPath(new URL('../src/views/OverviewView.vue', import.meta.url)),
+  'utf8'
+)
+
+test('risk dashboard normalizes amount, distributions, and ranking fields', () => {
+  const dashboard = normalizeRiskObservationDashboard({
+    total_observations: 5,
+    total_amount: 12800,
+    department_distribution: { 风控部: 3 },
+    expense_type_distribution: { travel: 2 },
+    risk_type_distribution: { duplicate_invoice: 2 },
+    supplier_distribution: { 上海差旅供应商: 1 },
+    employee_grade_distribution: { P6: 2 },
+    top_departments: [{ name: '风控部', count: 3, amount: 8800 }],
+    top_employees: [{ name: '风险员工', count: 2, amount: 6200 }],
+    top_suppliers: [{ name: '上海差旅供应商', count: 1, amount: 1200 }],
+    top_expense_types: [{ name: 'travel', count: 2, amount: 4600 }],
+    top_rules: [{ name: 'policy.duplicate_invoice', count: 2, amount: 3000 }]
+  })
+
+  assert.equal(dashboard.totalAmount, 12800)
+  assert.equal(dashboard.departmentDistribution['风控部'], 3)
+  assert.equal(dashboard.expenseTypeDistribution.travel, 2)
+  assert.equal(dashboard.riskTypeDistribution.duplicate_invoice, 2)
+  assert.equal(dashboard.supplierDistribution['上海差旅供应商'], 1)
+  assert.equal(dashboard.employeeGradeDistribution.P6, 2)
+  assert.equal(dashboard.topDepartments[0].amount, 8800)
+  assert.equal(dashboard.topRules[0].name, 'policy.duplicate_invoice')
+})
+
+test('risk dashboard renders overview amount and multi-dimension panels', () => {
+  assert.match(overviewViewModel, /label: '新增风险数'/)
+  assert.match(overviewViewModel, /label: '涉及金额'/)
+  assert.match(overviewViewModel, /label: '已确认风险'/)
+  assert.match(overviewViewModel, /label: '误报数量'/)
+  assert.match(dashboardComponent, /业务维度分布/)
+  assert.match(dashboardComponent, /异常排行/)
+  assert.match(dashboardComponent, /departmentDistribution/)
+  assert.match(dashboardComponent, /expenseTypeDistribution/)
+  assert.match(dashboardComponent, /supplierDistribution/)
+  assert.match(dashboardComponent, /employeeGradeDistribution/)
+  assert.match(dashboardComponent, /topDepartments/)
+  assert.match(dashboardComponent, /topEmployees/)
+  assert.match(dashboardComponent, /topSuppliers/)
+  assert.match(dashboardComponent, /topRules/)
+})
+
+test('risk dashboard wires window filter to trend, ranking, and cards data source', () => {
+  assert.match(overviewViewModel, /const activeRiskWindowDays = ref\(30\)/)
+  assert.match(overviewViewModel, /windowDays: activeRiskWindowDays\.value/)
+  assert.match(overviewViewModel, /watch\(activeRiskWindowDays/)
+  assert.match(overviewViewModel, /setRiskWindowDays/)
+  assert.match(overviewTemplate, /:window-options="riskWindowOptions"/)
+  assert.match(overviewTemplate, /:active-window-days="activeRiskWindowDays"/)
+  assert.match(overviewTemplate, /@update:window-days="setRiskWindowDays"/)
+  assert.match(dashboardComponent, /EnterpriseSelect/)
+  assert.match(dashboardComponent, /aria-label="风险看板时间窗口"/)
+  assert.match(dashboardComponent, /emit\('update:windowDays', \$event\)/)
+  assert.match(dashboardComponent, /RiskDailyTrendChart/)
+  assert.match(dashboardComponent, /rankingGroups/)
+})