feat(小宝预警): 自动生成 AI 风险解读

apps/web/lib/xiaobao-risk-ai.ts

@@ -102,6 +102,16 @@ export function getReusableInsight(
   return findCachedInsight(cache, risk.versionId, buildRiskInsightSignature(risk));
 }
 
+export function findPreviousRiskSnapshot(
+  snapshots: XiaobaoRiskSnapshot[],
+  versionId: string,
+  today: string,
+): XiaobaoRiskSnapshot | undefined {
+  return snapshots
+    .filter((snapshot) => snapshot.versionId === versionId && snapshot.date < today)
+    .sort((a, b) => b.createdAt.localeCompare(a.createdAt))[0];
+}
+
 export function buildRiskInterpretRequest(risk: XiaobaoVersionRisk): AgentRiskInterpretRequest {
   return {
     versionId: risk.versionId,