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OJ2/apps/api/src/db/meta/0017_snapshot.json
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feat(AI 提示): 提示落库并收集学生评价，落进 ai_hint 
AI 时代 OJ 设计的 2a：先把现有提示记下来，为后面的分级和两段式诊断攒对照数据。
提示本身的行为不变，发给模型的 prompt 一字未改。
- 迁移 0017 建 ai_hint：模型、prompt 版本、内容、错误、耗时、学生评价；
  成功和失败都记（失败率是 AI 悄悄变差时最先动的数）。挂在 submission 上 CASCADE
- streamChat 第三个参数改成 { onComplete, onError }：onComplete 的返回值并进
  done 事件，提示 id 由此带回前端；班级学情分析那处调用同步改写，行为不变
- 落库失败只记日志，不影响学生拿到提示
- 新增 POST /ai/hint/:id/feedback：只能评自己的提示（别人的一律 404），可以改票
- 前端提示生成完出「有帮助 / 没帮助」，选中的高亮；后端没存上时不出按钮
- 实跑：本地假 LLM 验证成功 / provider 断开 / 缺 AI_KEY 三条路径的落库，
  评价接口六种请求，浏览器里按钮出现、改票、重复点不发请求

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-19 06:00:10 -06:00

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}
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