feat: 增强风险规则生成引擎与预算中心页面

后端拆分风险规则生成为解释器、语义分析、本体对齐等子模块，
优化模板执行和流程图生成，完善员工种子数据和导入逻辑，增强
报销单权限策略和草稿持久化，前端新增预算中心视图和趋势图
组件，重构审计页面和风险规则测试对话框交互，完善文档中心
和报销创建页面细节，补充单元测试覆盖。

server/src/app/services/expense_claim_platform_risk.py

@@ -13,6 +13,7 @@ from app.services.agent_asset_spreadsheet import RISK_RULES_LIBRARY
 from app.services.expense_rule_runtime import (
     RuntimeTravelPolicy,
 )
+from app.services.risk_rule_manifest_normalizer import normalize_risk_rule_manifest
 from app.services.risk_rule_template_executor import RiskRuleTemplateExecutor
 
 
@@ -46,7 +47,7 @@ class ExpenseClaimPlatformRiskMixin:
             flags.append(flag)
             severity = str(flag.get("severity") or "").strip().lower()
             action = str(flag.get("action") or "").strip().lower()
-            if severity == "high" or action == "block":
+            if severity in {"high", "critical"} or action == "block":
                 blocking_reasons.append(str(flag.get("message") or flag.get("label") or "").strip())
 
         deduplicated_reasons = list(dict.fromkeys(reason for reason in blocking_reasons if reason))
@@ -100,6 +101,7 @@ class ExpenseClaimPlatformRiskMixin:
             except (FileNotFoundError, ValueError):
                 continue
 
+            payload = normalize_risk_rule_manifest(payload)
             manifest_code = str(payload.get("rule_code") or rule_code).strip()
             if not manifest_code or (code_filter and manifest_code not in code_filter):
                 continue
@@ -129,6 +131,7 @@ class ExpenseClaimPlatformRiskMixin:
                     )
                 except (FileNotFoundError, ValueError):
                     continue
+                payload = normalize_risk_rule_manifest(payload)
                 rule_code = str(payload.get("rule_code") or "").strip()
                 if not rule_code or rule_code in manifests_by_code:
                     continue
@@ -612,7 +615,7 @@ class ExpenseClaimPlatformRiskMixin:
         outcomes = manifest.get("outcomes") if isinstance(manifest.get("outcomes"), dict) else {}
         fail_outcome = outcomes.get("fail") if isinstance(outcomes.get("fail"), dict) else {}
         severity = str(fail_outcome.get("severity") or "medium").strip().lower() or "medium"
-        default_action = "block" if severity == "high" else "manual_review"
+        default_action = "block" if severity in {"high", "critical"} else "manual_review"
         action = str(fail_outcome.get("action") or default_action).strip()
         label = str(manifest.get("name") or manifest.get("rule_code") or "风险规则命中").strip()