Reframe a series from "ordered chapters that own pages" to ONE flat,
series-global ordered run of pages with optional cosmetic chapter DIVIDERS
over it. A chapter no longer wraps content — it's a labeled divider anchored
to the page that begins it; a page's chapter is derived as the nearest
preceding divider. This is what lets installments assembled from multiple
sources sit in one continuous, correctly-numbered sequence (operator's
Goblin Juice case).
- migration 0047: flatten each series to a series-global page_number
(preserving today's reading order); convert each existing chapter to a
divider anchored at its first page (keeping title/stated_part); drop
series_page.chapter_id; reshape series_chapter (anchor_page_id UNIQUE FK,
drop chapter_number/is_placeholder/stated_page_start/end). Loss-safe for
content; drops empty placeholder chapters + a redundant page-1 divider.
- series_page: page_number is now the series-global order; no chapter_id.
- series_chapter: anchored divider (anchor_page_id, title, stated_part).
- series_service: flat list_pages (one run + derived dividers + per-page
source_post + part_gaps), series-wide reorder/renumber, divider CRUD
(create/update/move/delete); retired per-chapter reorder/merge/placement.
- api/tags: drop chapter_id from add; /chapters endpoints are divider
create/update/delete (removed chapter reorder/merge/page-reorder).
- series_match_service: series "end" reads max(series_page.stated_page);
accept appends via add_post. tag_service series-merge appends src's pages
after tgt's max so the merged series stays one clean run.
- frontend: seriesManage store + SeriesManageView → one continuous
drag-reorder grid with inline divider bars + series-global page numbers;
reader walks the flat run, headings from dividers; PostSeriesMenu copy.
- tests reworked across the series suite for the divider model.
Phase 2 (pending staging for add-from-post) is separate.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
