chore(types): expose plan reason breakdown for PriorityHover

PlanReasonBriefSchema 增 breakdown(z.unknown().nullable().optional()),
plan.service.toPlanReasonBrief 透传 — 前端 PriorityHover 拿到 6 因子
明细做悬浮算法解释,无 breakdown 时 fallback 简版文案。

apps/pac-service/src/modules/plan/plan.service.ts

@@ -380,6 +380,7 @@ function toPlanReasonBrief(
     signals: (r.signals as PlanReasonBrief['signals']) ?? null,
     priorityScore: r.priorityScore,
     reason: r.reason,
+    breakdown: r.breakdown ?? null,
   };
 }
 

packages/types/src/schemas/plan.ts

@@ -158,6 +158,8 @@ export const PlanReasonBriefSchema = z.object({
   priorityScore: z.number(),
   /// 老数据 / signals 缺失时的兜底自然语言
   reason: z.string(),
+  /// 6 因子算分明细 — 前端 PriorityHover 渲染。无 breakdown 时 fallback 简版文案。
+  breakdown: z.unknown().nullable().optional(),
 });
 export type PlanReasonBrief = z.infer<typeof PlanReasonBriefSchema>;