# BD-2026-014 — Temporal refresh (tips · star · rhythm)

Status: Approved  
**ECR:** ECR-014  
**Date:** 2026-08-13  
**Change Level:** L2  
**Risk:** Low  
**Retrospective:** true（实现已部分在树，本 BD 冻结边界）  

## Backend Change Boundary

### In

- `home_daily_tips` 表 · HomeDailyTipsRepo · DailyTips 响应装饰时辰窗  
- report `refreshTemporalIfNeeded` on Get / GetLatest（star|rhythm）  
- OpenAPI 字段说明  

### Out

- 头像 · scalebank · 新建报告 id 换日  

## Data flow

```text
GET /home/daily-tips
  → CurrentShichen → cache hit? return+decorate : fallback + async LLM warm
  → valid_until = next 时辰 start

GET /reports/latest|/:id (star|rhythm)
  → if as_of != today CST → in-place UpdateContent outlook/tips
  → stamp valid_until = next midnight CST
```

## Migration

YES — `000023_home_daily_tips`（若尚未应用则 migrate）

## Test

- `TestCurrentShichenBoundaries` · `TestFallbackTipsChangeByShichen`  
- `temporal_test.go` as_of / valid_until  
- 可选：手工 GET 冒烟  

## Rollback

- 停用 refresh 调用；表可保留