feat: 新增风险规则生成引擎与知识图谱可视化

后端新增风险规则自动生成和模板执行服务，支持从规则资产
批量生成并持久化风险规则文件；知识库入库日志增强图谱
查询和本地 RAG 回退，前端审计页面增加风险规则模型和流
程图组件，知识入库面板拆分为图谱可视化子组件，报销创
建页面增加引导式流程模型，更新知识库索引数据。

web/src/views/scripts/auditViewModel.js

@@ -19,6 +19,17 @@ import {
   TYPE_META,
   VERSION_STATE_META
 } from './auditViewMetadata.js'
+import {
+  buildRiskRuleFieldSummary,
+  formatRiskRuleAge,
+  resolveRiskRuleBusinessDescription,
+  resolveRiskRuleCreatedAt,
+  resolveRiskRuleFields,
+  resolveRiskRuleFlow,
+  resolveRiskRuleFlowDiagramSvg,
+  resolveRiskRuleSeverity,
+  resolveRiskRuleSeverityLabel
+} from './auditViewRiskRuleModel.js'
 
 export {
   DETAIL_TITLES,
@@ -413,14 +424,26 @@ export function applyRiskRuleJsonState(target, payload, apiPayload) {
   const riskCategory =
     normalizeText(rulePayload.risk_category) ||
     resolveRiskRuleCategory({ ...target, risk_category: rulePayload.risk_category, config_json: rulePayload })
+  const riskRuleFields = resolveRiskRuleFields(rulePayload)
+  const riskRuleCreatedAt = resolveRiskRuleCreatedAt(rulePayload, target.createdAt || target.updatedAt)
 
   return {
     ...target,
     riskRuleDescription: fullDescription,
+    riskRuleBusinessDescription: resolveRiskRuleBusinessDescription(rulePayload, fullDescription),
     riskRuleSubtitle: buildRiskListSubtitle(fullDescription, 48),
     riskCategory,
     scope: riskCategory,
     riskRuleSourceRef: resolveRiskRuleSourceRef(rulePayload),
+    riskRuleSeverity: resolveRiskRuleSeverity(rulePayload),
+    riskRuleSeverityLabel: resolveRiskRuleSeverityLabel(rulePayload),
+    riskRuleCreatedAt: formatDateTime(riskRuleCreatedAt),
+    riskRuleAgeLabel: formatRiskRuleAge(riskRuleCreatedAt),
+    riskRuleFields,
+    riskRuleFieldSummary: buildRiskRuleFieldSummary(riskRuleFields),
+    riskRuleFlow: resolveRiskRuleFlow(rulePayload, riskRuleFields),
+    riskRuleFlowDiagramSvg:
+      normalizeText(apiPayload?.flow_diagram_svg) || resolveRiskRuleFlowDiagramSvg(rulePayload),
     riskRuleSummary: {
       name: apiPayload?.name || target.name,
       evaluator: apiPayload?.evaluator || rulePayload.evaluator || '',
@@ -1219,6 +1242,7 @@ export function buildDetailViewModel(detail, runs) {
     statusValue: detail.status,
     statusTone: statusMeta.tone,
     hitRate: buildRowMetric(detail, typeKey),
+    createdAt: detail.created_at,
     updatedAt: formatDateTime(detail.updated_at),
     badgeTone: tabMeta.badgeTone,
     configJson,
@@ -1227,8 +1251,17 @@ export function buildDetailViewModel(detail, runs) {
     riskRuleJsonText: '{}',
     riskRuleSummary: null,
     riskRuleDescription: '',
+    riskRuleBusinessDescription: '',
     riskRuleSubtitle: usesJsonRiskRule ? buildRiskListSubtitle(detail.description) : '',
     riskRuleSourceRef: '',
+    riskRuleSeverity: 'medium',
+    riskRuleSeverityLabel: '中风险',
+    riskRuleCreatedAt: formatDateTime(detail.created_at),
+    riskRuleAgeLabel: formatRiskRuleAge(detail.created_at),
+    riskRuleFields: [],
+    riskRuleFieldSummary: '未识别字段',
+    riskRuleFlow: resolveRiskRuleFlow({}, []),
+    riskRuleFlowDiagramSvg: normalizeText(configJson.flow_diagram_svg),
     riskCategory: typeKey === 'rules' ? ruleScenarioCategory : '',
     ruleDocument,
     scenarioList: typeKey === 'rules' && ruleScenarioCategory