feat(ai): 优化拆解目标和负责人推荐

apps/web/lib/version-plan.ts

@@ -1,3 +1,5 @@
+import type { AgentDecomposeTarget } from '@ftb/shared';
+
 export type PlanTaskStatus = 'pending' | 'in_progress' | 'completed';
 export type ProductPlanKind = 'design' | 'review';
 export type ProductPlanReviewResult = 'passed' | 'failed';
@@ -73,6 +75,7 @@ export interface VersionPlan {
   aiDecomposeStatus?: 'idle' | 'in_progress' | 'completed' | 'error';
   aiDecomposeAt?: string;
   aiDecomposeBy?: string;
+  aiDecomposeTarget?: AgentDecomposeTarget;
   aiDecomposeError?: string;
 }