feat: 本体字段治理与风险规则模板执行器重构

- 新增本体字段注册表与字段治理审计脚本
- 重构风险规则模板执行器、DSL 验证与清单分类器
- 完善票据夹服务与差旅请求详情页交互
- 优化趋势图表与总览页数据展示
- 增强报销平台风险分级与模拟公司筛选
- 补充本体字段、风险规则生成与票据夹服务测试覆盖

web/tests/requestProgressSteps.test.mjs

@@ -74,6 +74,58 @@ test('claim mapper falls back to employee name for legacy profile lookup', () =>
   assert.equal(request.profileEmployeeId, 'Legacy Alice')
 })
 
+test('claim mapper keeps low reimbursement risk as low risk instead of medium', () => {
+  const riskMessage = '票据商品或服务描述较笼统，建议审批人核对真实用途和明细清单。'
+  const request = mapExpenseClaimToRequest({
+    id: 'claim-low-risk-1',
+    claim_no: 'RE-LOW-RISK-1',
+    employee_name: 'Alice',
+    department_name: 'Finance',
+    expense_type: 'travel',
+    reason: 'Trip',
+    location: 'Shanghai',
+    amount: 354,
+    invoice_count: 1,
+    occurred_at: '2026-02-20T00:00:00.000Z',
+    created_at: '2026-06-03T04:22:16.000Z',
+    updated_at: '2026-06-03T04:25:48.000Z',
+    status: 'draft',
+    approval_stage: WAIT_SUBMIT,
+    risk_flags_json: [
+      {
+        source: 'submission_review',
+        hit_source: 'rule_center',
+        severity: 'low',
+        action: 'warning',
+        label: '差旅票据服务内容笼统低风险',
+        message: riskMessage,
+        risk_domain: 'invoice',
+        visibility_scope: 'submitter',
+        actionability: 'fixable_by_submitter',
+        business_stage: 'reimbursement'
+      }
+    ],
+    items: [
+      {
+        id: 'item-low-risk-train',
+        item_date: '2026-02-20',
+        item_type: 'train_ticket',
+        item_reason: '武汉-上海',
+        item_location: '',
+        item_amount: 354,
+        invoice_id: 'claim-low-risk-1/item-low-risk-train/train.pdf'
+      }
+    ]
+  })
+
+  assert.equal(request.riskTone, 'low')
+  assert.equal(request.riskLabel, '低风险')
+  assert.equal(request.riskSummary, riskMessage)
+  assert.equal(request.expenseItems[0].riskTone, 'low')
+  assert.equal(request.expenseItems[0].riskLabel, '低风险')
+  assert.equal(request.expenseItems[0].riskText, riskMessage)
+})
+
 test('application claims are mapped as application documents', () => {
   const request = mapExpenseClaimToRequest({
     id: 'claim-application-1',