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。

server/rules/risk-rules/risk.expense.generated_20260523010846.json

@@ -0,0 +1,90 @@
+{
+  "schema_version": "2.0",
+  "rule_code": "risk.expense.generated_20260523010846",
+  "name": "酒店发票城市必须与申报目的地或交通票风险规则",
+  "description": "当报销业务满足“酒店发票城市必须与申报目的地或交通票行程城市一致，如果都不一致，则判定为高风险，并要求报销人补充异常行程说明。”时，系统会按高风险进行提示，并要求经办人或审核人补充核对依据。",
+  "enabled": true,
+  "risk_dimension": "natural_language_rule",
+  "risk_category": "报销",
+  "ontology_signal": "natural_language_risk",
+  "evaluator": "template_rule",
+  "template_key": "field_compare_v1",
+  "applies_to": {
+    "domains": [
+      "expense"
+    ]
+  },
+  "inputs": {
+    "fields": [
+      {
+        "key": "claim.reason",
+        "label": "报销事由",
+        "type": "text",
+        "source": "claim"
+      },
+      {
+        "key": "claim.location",
+        "label": "申报地点",
+        "type": "text",
+        "source": "claim"
+      },
+      {
+        "key": "claim.employee_name",
+        "label": "报销人",
+        "type": "text",
+        "source": "claim"
+      },
+      {
+        "key": "attachment.route_cities",
+        "label": "行程城市",
+        "type": "list",
+        "source": "attachment"
+      }
+    ]
+  },
+  "params": {
+    "template_key": "field_compare_v1",
+    "field_keys": [
+      "claim.reason",
+      "claim.location",
+      "claim.employee_name",
+      "attachment.route_cities"
+    ],
+    "condition_summary": "对比报销事由、申报地点、报销人之间是否一致或存在交集",
+    "natural_language": "酒店发票城市必须与申报目的地或交通票行程城市一致，如果都不一致，则判定为高风险，并要求报销人补充异常行程说明。",
+    "conditions": [
+      {
+        "left": "claim.reason",
+        "operator": "overlap",
+        "right": "claim.location"
+      }
+    ]
+  },
+  "outcomes": {
+    "pass": {
+      "severity": "none",
+      "action": "continue"
+    },
+    "fail": {
+      "severity": "high",
+      "action": "manual_review"
+    }
+  },
+  "metadata": {
+    "owner": "min.wang@xfinance.com",
+    "stability": "generated_draft",
+    "source_ref": "自然语言风险规则",
+    "created_at": "2026-05-23T01:08:46.286513+00:00",
+    "created_by": "min.wang@xfinance.com",
+    "natural_language": "酒店发票城市必须与申报目的地或交通票行程城市一致，如果都不一致，则判定为高风险，并要求报销人补充异常行程说明。",
+    "business_explanation": "当报销业务满足“酒店发票城市必须与申报目的地或交通票行程城市一致，如果都不一致，则判定为高风险，并要求报销人补充异常行程说明。”时，系统会按高风险进行提示，并要求经办人或审核人补充核对依据。",
+    "condition_summary": "对比报销事由、申报地点、报销人之间是否一致或存在交集",
+    "flow": {
+      "start": "报销单据提交",
+      "evidence": "读取报销事由、申报地点、报销人",
+      "decision": "对比报销事由、申报地点、报销人之间是否一致或存在交集",
+      "pass": "未命中风险，继续业务流转",
+      "fail": "命中高风险，提示复核"
+    }
+  }
+}