## 1. iPad shell (HomeDeck)

- [x] 1.1 Root IA: HomeDeck + Study + DownloadBrowser + Menu (no Explorer / Album-edit / upload-import primary path)
- [x] 1.2 HomeDeck UI per `ui03-deck.png` (upper shelf, lower recent; hide scroll indicators)
- [x] 1.3 Upper shelf = local downloaded courses only; empty CTA → DownloadBrowser
- [x] 1.4 Recent row ~2 large cards + horizontal scroll; tap/play resume
- [x] 1.5 Default cover mapping when no cover
- [x] 1.6 Menu: add courses, storage, last PC URL, about

## 2. Local course + session models

- [x] 2.1 `LocalCourse` + session/progress with `courseId` / `itemIndex`
- [x] 2.2 `Documents/courses/<id>/` helpers and path safety
- [x] 2.3 Manifest parse/validate
- [x] 2.4 Recent list persistence and bump-on-open
- [x] 2.5 First-launch / migration for incompatible old library data



## 3. PC Publish

- [x] 3.1 Publish UI: toggle, URL, QR, trusted-LAN copy; port 8787 + fallback
- [x] 3.2 HTTP lifecycle start/stop (exit stops server)
- [x] 3.3 `GET /api/health`, `GET /api/courses` (combo only)
- [x] 3.4 `GET /api/courses/:id` metadata
- [x] 3.5 Pack builder + zip (media Stored; missing media → error)
- [x] 3.6 `GET /api/courses/:id/pack`
- [x] 3.7 HTML list at `GET /`
- [x] 3.8 Combo albums enter catalog via Explorer Start / draft Start·Save; promote orphan combo sessions when listing



## 4. PC Explorer / Lesson (group courses)

- [x] 4.1 Compact Explorer chrome: path under title; icon actions for new folder / import files / import folder
- [x] 4.2 New album/course tab starts empty; selection remains on inactive selection tab (restore highlights on switch-back)
- [x] 4.3 Combo draft: append item when left selection resolves to a pair
- [x] 4.4 Lesson cards: context menu (Mac two-finger/right-click; Win right-click/long-press) for play/continue and delete



## 5. iPad download

- [x] 5.1 Paste base URL; remember last successful URL
- [x] 5.2 Camera QR scan → fill URL → fetch catalog
- [x] 5.3 Unreachable →「请先在电脑打开分享」
- [x] 5.4 Multi-select download → unzip → validate → register `LocalCourse`
- [x] 5.5 Busy/progress + per-course result; newer `updatedAt` overwrite
- [x] 5.6 Local networking ATS + camera usage description; upload-server not primary path



## 6. Study from local courses

- [x] 6.1 Open Study only from LocalCourse / recent / session
- [x] 6.2 Single-item direct open; multi-item picker
- [x] 6.3 Bind players for `single_*`, `video_pdf`, `pdf_audio`
- [x] 6.4 Orientation from stage size; divider drag for split ratio; collapse/expand secondary stage
- [x] 6.5 Trailing icons: prev/next PDF page; leading back icon-only; no mode strip / no save button
- [x] 6.6 Auto progress: interaction + 60s timer + leave/background; restore on reopen
- [x] 6.7 Shelf open updates recent ordering



## 7. Docs / smoke

- [x] 7.1 Smoke: PC combo → publish → iPad scan/download → home → study → relaunch resume
- [x] 7.2 README / smoke checklist reflect child-deck + publish flow
- [x] 7.3 OpenSpec artifacts (`proposal` / `design` / `specs` / `tasks`) describe current behavior only