# Changelog / 更新日志

All notable non-WebUI user-visible changes should be documented in this file, newest version on top.
本文件记录所有非 WebUI 的重要用户可见变更，最新版本在最上方。

The format loosely follows Keep a Changelog and can be adapted to the team's habits.
本文档参考了 Keep a Changelog 的思路，也可以根据团队习惯调整。

## [Unreleased]

### Added / 新增

- API: resumable chunked upload protocol for large files — `POST /api/libraries/:id/upload/init` (fingerprint-derived deterministic `uploadId`, rejects totals over `UPLOAD_MAX_MB` with `413 too_large`), `PUT /api/uploads/:uid/parts/:index` (parts ≤ 32MB), `GET /api/uploads/:uid` (received parts, for resume), `POST /api/uploads/:uid/complete` (assemble + atomic land, same path contract as single-POST upload). Sessions persist under `BOOKS_DIR/.uploads/` with 24h opportunistic sweep. `UPLOAD_MAX_MB` is now wired through both compose stacks/`.env`; `.env.example` sets 2048 and drops `NGINX_CLIENT_MAX_BODY_SIZE` to 32m (nginx only ever sees one chunk).
- API: 新增大文件可续传分片上传协议——`POST /api/libraries/:id/upload/init`（按指纹派生确定性 `uploadId`，总量超 `UPLOAD_MAX_MB` 返回 `413 too_large`）、`PUT /api/uploads/:uid/parts/:index`（单片 ≤32MB）、`GET /api/uploads/:uid`（查询已传分片以续传）、`POST /api/uploads/:uid/complete`（拼接后原子落盘，返回与单发上传一致的 `path`）。会话存于 `BOOKS_DIR/.uploads/`，超 24h 顺手清理。`UPLOAD_MAX_MB` 已接入两份 compose/`.env`；`.env.example` 调至 2048 并将 `NGINX_CLIENT_MAX_BODY_SIZE` 降为 32m（nginx 只见单个分片）。

### Changed / 变更

- API: upload over `UPLOAD_MAX_MB` now returns `413 too_large` with the limit in the message; previously the size abort was misreported as `400 bad_request "multipart field 'file' required"`.
- API：超过 `UPLOAD_MAX_MB` 的上传现在返回 `413 too_large` 并在消息中带上限额；此前体积超限被误报为 `400 bad_request "multipart field 'file' required"`。
- API: `POST /api/libraries` now takes only `{name}`; `root_path` is generated server-side as `BOOKS_DIR/<sanitized name>` (no client-supplied paths, validated at creation).
- API：`POST /api/libraries` 只需 `{name}`；`root_path` 由服务端生成为 `BOOKS_DIR/<清洗后的库名>`（不再接受客户端指定路径，创建时即校验）。
- Repo structure conformed to `AGENTS.md`: `web/` renamed to `frontend/`; backend HTTP layer moved from `internal/api` to `cmd/webui/{api,handlers}` (`cmd/server` → `cmd/webui`); README/CHANGELOGs relocated under `docs/` (`README_zh.md` added as Chinese mirror); module-level `.gitignore`s added (`backend/`, `deploy/`); stray root `library/` removed (book files live in `deploy/api/storage/`); debug binaries untracked.
- Docs: `docs/README.md` is now the English primary; previous Chinese README mirrored to `docs/README_zh.md`.