v1.58.45

[1.58.45] — 2026-05-20

fix(ux): UX-D-K — #/help TOC scroll-spy highlights the current section. v1.58.36 audit: as the user scrolled the help body, the TOC sidebar (sticky, ~92 H2 sections) didn't indicate which section they were reading — they had to mentally scan the H2 above the fold against the TOC. New IntersectionObserver in public/js/views/help.js observes every .help-article h2[id] and applies .toc-current to the matching TOC <a> link when the H2 enters the upper-third reading band (rootMargin: "-30% 0% -60% 0%"). CSS public/css/app.css gives .toc-current a brand-red left-border + var(--rausch) color + font-weight: 600 so the active item reads at a glance. The observer is torn down on hashchange next to the existing scroll listener, so no observer leaks when the user leaves #/help. 938 → 939 unit. (UX-D-K)

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