fix(ai): 拆解原型无需求ID任务

apps/web/lib/test-case.ts

@@ -12,6 +12,7 @@ export interface TestCase {
   caseNo: string;
   versionId: string;
   requirementId?: string;
+  requirementName?: string;
   roundNo?: number;
   sourceCaseId?: string;
   title: string;
@@ -88,6 +89,7 @@ export function normalizeTestCase(testCase: Partial<TestCase>, index = 0): TestC
     caseNo: testCase.caseNo || `TC-${String(index + 1).padStart(3, '0')}`,
     versionId: testCase.versionId || '',
     requirementId: testCase.requirementId,
+    requirementName: testCase.requirementName,
     roundNo: getTestCaseRoundNo(testCase),
     sourceCaseId: testCase.sourceCaseId,
     title: testCase.title || `测试用例 ${index + 1}`,
@@ -165,6 +167,7 @@ export function copyTestCaseToRound(source: TestCase, roundNo: number, createdBy
   return {
     versionId: source.versionId,
     requirementId: source.requirementId,
+    requirementName: source.requirementName,
     roundNo,
     sourceCaseId: source.sourceCaseId ?? source.id,
     title: source.title,