feat(cbz): adapt reader to real archive structure — PageIndex skips macOS junk (__MACOSX/ and ._ AppleDouble were polluting pages with 163-byte blacks), pages endpoint derives chapters[{title,start}] from folder layout, imageless zip now lands state=error instead of an empty reader, CbzReader gains 目录 sidebar + prev/next chapter (TextReader pattern, rd-* classes); pagesidx cache key bumped for one-time invalidation; e2e on 311MB 調教開關：第二季.zip: 15048→7524 real pages, 52 chapters, all JPEGs

docs/CHANGELOG.md

@@ -10,11 +10,17 @@ The format loosely follows Keep a Changelog and can be adapted to the team's hab
 
 ### Added / 新增
 
+- API: CBZ page indexing now skips macOS packaging junk (`__MACOSX/…` and `._*` AppleDouble files), which used to land in the page list as ~163-byte black "pages"; `GET /api/books/:id/pages` additionally returns `chapters:[{title,start}]` derived from the archive's folder structure (e.g. 第1話…), so per-folder comics expose their real organization.
+- API：CBZ 页索引现会跳过 macOS 打包垃圾（`__MACOSX/…` 与 `._*` 资源叉文件），此前它们以 ~163 字节黑页混入页列表；`GET /api/books/:id/pages` 新增 `chapters:[{title,start}]`，按压缩包内目录结构（如 第1話…）给出真实章节。
+
 - 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
 
+- Scanner: an image-list-less archive (`.zip`/`.cbz` with no page images — video packs, document dumps) is now recorded as `state=error` ("no images in archive") instead of registering as an empty CBZ with a blank reader.
+- 扫描器：不含任何图片条目的 `.zip`/`.cbz`（视频包、文档包）现记录为 `state=error`（"no images in archive"），不再注册成空 CBZ 留下一个白板阅读器。
+
 - 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).

docs/CHANGELOG_web.md

@@ -10,6 +10,9 @@ The format loosely follows Keep a Changelog and can be adapted to the team's hab
 
 ### Added / 新增
 
+- Folder-structured comics gain a 目录 sidebar in the CBZ reader: each archive folder (第N話…) becomes a chapter that jumps to its first page, with 上一章/下一章 buttons, a current-chapter counter, and the active row highlighted and scrolled into view — flat archives show no extra UI.
+- 按目录组织的漫画在 CBZ 阅读器新增「目录」侧栏：压缩包内每个文件夹（第N話…）即一章，点击直达该话首页；工具条配上一章/下一章与当前章计数，目录内高亮当前章并自动居中；平铺无目录的包不显示多余控件。
+
 - Library uploads over 16MB now auto-switch to the resumable chunked protocol (8MB parts): failed parts retry in place up to 3 times and already-sent parts are skipped, so a flaky upload continues instead of starting over; small files keep the original single request.
 - 书库上传超过 16MB 自动切换为可续传分片协议（每片 8MB）：失败的分片原地重试至多 3 次，已传片自动跳过，中断后继续而不是从头再来；小文件仍走原单次上传。