Each chapter in the right-hand menu gets a caret that unfolds its
numbered sections (e.g. the prologue's 28 scenes); clicking one jumps
straight to it. The chapter you're reading starts unfolded, other
chapters' sections link across (/storyline/overview#section-…), and the
section at the top of the pane is highlighted as you scroll.
- ChapterOutline service parses each rendered chapter for its
<h2 class="storyline-section"> headings, adds anchor ids and returns the
outline; the controller renders all chapters once to feed the sidebar.
- storyline-toc Stimulus controller: fold/unfold, in-pane jump, scroll-spy
(works in the split view and in the small-screen window-scroll fallback).
- Tests for the outline parser.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
