T21b and T21c: Documents, reading and knowledge

- DocumentViewer: pages the app drew on a desk, the page under the view's middle
  counted, zoom steps and fit, thumbnails, notes pinned where a press lands, and
  the owner's FindWidget over the pages, hits lit and the current one revealed
- PageThumbnailList, EpubReader (chapters, type size, progress), PrintPreview
- MarkdownRenderer feeds TableOfContents through sections and outline
- Footnote, TooltipTerm, Glossary, ReadingProgress, ZenMode
- Backlinks, Favorites, TrashBin, PageCover, PageIcon, TemplatePicker,
  VersionHistory with PageHistoryDiff
- editor::FindWidget shows the replace fold and option toggles only with handlers
- block editor tests move to documents/blocks
- icons: a-arrow-down, a-arrow-up
- gallery: reading and knowledge sections; scripted find, changes and zen

tasks/ch21-30.md

@@ -25,33 +25,33 @@
 
 ## T21b Documents · Reading
 
-- [ ] MarkdownRenderer
-- [ ] DocumentViewer — host pages
-- [ ] PDFViewer — host pages; thumbnails, search, zoom, notes
-- [ ] EpubReader — host chapters
-- [ ] OfficePreview — host pages
-- [ ] PageThumbnailList
-- [ ] TableOfContents → `navigation::TableOfContents`
-- [ ] DocumentOutline → `navigation::TableOfContents`
-- [ ] Footnote
-- [ ] Glossary / TooltipTerm
-- [ ] ReadingProgress
-- [ ] FocusMode / ZenMode
-- [ ] PrintPreview — host pages
+- [x] MarkdownRenderer
+- [x] DocumentViewer — host pages
+- [x] PDFViewer — host pages; thumbnails, search, zoom, notes → `documents::DocumentViewer` with `thumbnails`, `find` (an `editor::FindWidget`) and `notes`
+- [x] EpubReader — host chapters
+- [x] OfficePreview — host pages → `documents::DocumentViewer`
+- [x] PageThumbnailList
+- [x] TableOfContents → `navigation::TableOfContents`; `MarkdownRenderer::sections` and `outline` feed it
+- [x] DocumentOutline → `navigation::TableOfContents`
+- [x] Footnote
+- [x] Glossary / TooltipTerm
+- [x] ReadingProgress
+- [x] FocusMode / ZenMode → `documents::ZenMode`
+- [x] PrintPreview — host pages
 
 ## T21c Documents · Knowledge
 
-- [ ] PageTree
-- [ ] Backlinks
-- [ ] GraphView → `charts::NetworkGraph`
-- [ ] PageCover / PageIcon
-- [ ] PageProperties
-- [ ] DatabaseView — table, board, gallery, calendar, timeline
-- [ ] TemplatePicker
-- [ ] TrashBin
-- [ ] VersionHistory
-- [ ] PageHistoryDiff
-- [ ] Favorites / Pinned
+- [x] PageTree → `lists::Tree`, a page's emoji leading its label
+- [x] Backlinks
+- [x] GraphView → `charts::NetworkGraph`
+- [x] PageCover / PageIcon
+- [x] PageProperties → `data_display::PropertyGrid`
+- [x] DatabaseView — table, board, gallery, calendar, timeline → lands with Project (T31): its board is the KanbanBoard, its calendar the CalendarMonthView (T30)
+- [x] TemplatePicker
+- [x] TrashBin
+- [x] VersionHistory
+- [x] PageHistoryDiff
+- [x] Favorites / Pinned → `documents::Favorites`
 
 ## T22 Collaboration — `src/collab`
 

tasks/ch31-43.md

@@ -22,6 +22,7 @@
 - [ ] WorkloadView
 - [ ] TimeTracker
 - [ ] Pomodoro Timer
+- [ ] DatabaseView (from T21c) — table, board, gallery, calendar, timeline
 
 ## T32 Canvas & Design — `src/canvas`