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/assets/styles/views/travel-reimbursement-create-view-part2.css

@@ -687,6 +687,13 @@
   z-index: 1;
 }
 
+.insight-body.document-review-body {
+  display: flex;
+  flex-direction: column;
+  align-content: stretch;
+  overflow: hidden;
+}
+
 .review-side-card {
   display: grid;
   gap: 10px;
@@ -1186,6 +1193,10 @@
 
 .review-ticket-drawer {
   min-height: 0;
+  grid-template-rows: auto minmax(0, 1fr);
+  height: 100%;
+  flex: 1 1 auto;
+  overflow: hidden;
 }
 
 .review-document-switch-head {
@@ -1226,6 +1237,7 @@
 
 .review-document-stage {
   display: grid;
+  grid-template-rows: auto auto minmax(0, 1fr);
   gap: 12px;
   min-height: 0;
 }
@@ -1292,7 +1304,8 @@
 .review-document-scroll {
   display: grid;
   gap: 12px;
-  max-height: 430px;
+  max-height: none;
+  min-height: 0;
   overflow-y: auto;
   padding-right: 4px;
 }
@@ -1320,8 +1333,15 @@
 .review-document-preview-card.image img {
   display: block;
   width: 100%;
-  height: 188px;
-  object-fit: cover;
+  height: auto;
+  max-height: 260px;
+  object-fit: contain;
+}
+
+.review-document-preview-card.image {
+  display: grid;
+  place-items: center;
+  min-height: 220px;
 }
 
 .review-document-preview-placeholder {