feat(平台): 补齐服务端持久化和AI拆解契约

apps/web/lib/requirement-selector.ts

@@ -0,0 +1,42 @@
+import type { Requirement } from './requirement';
+
+export interface RequirementOption {
+  id: string;
+  code: string;
+  title: string;
+  productOwner?: string;
+  status: Requirement['status'];
+  isHistorical?: boolean;
+}
+
+export function toRequirementOption(requirement: Requirement, isHistorical = false): RequirementOption {
+  return {
+    id: requirement.id,
+    code: requirement.code,
+    title: requirement.title,
+    productOwner: requirement.productOwner,
+    status: requirement.status,
+    isHistorical,
+  };
+}
+
+export function getProjectAdoptedRequirementCandidates(requirements: Requirement[], projectId: string): Requirement[] {
+  return requirements
+    .filter((r) => r.projectId === projectId && r.status === 'adopted')
+    .sort((a, b) => a.code.localeCompare(b.code, 'zh-CN'));
+}
+
+export function mergeSelectedRequirementOptions(
+  candidates: Requirement[],
+  allRequirements: Requirement[],
+  selectedIds: string[] = [],
+): RequirementOption[] {
+  const candidateOptions = candidates.map((r) => toRequirementOption(r));
+  const candidateIds = new Set(candidateOptions.map((r) => r.id));
+  const historical = selectedIds
+    .filter((id) => !candidateIds.has(id))
+    .map((id) => allRequirements.find((r) => r.id === id))
+    .filter((r): r is Requirement => Boolean(r))
+    .map((r) => toRequirementOption(r, true));
+  return [...candidateOptions, ...historical];
+}