S8 asserts scrolly-section splits its slot content into visible step panels
(the blank-text-column regression had no coverage: S3 only checked the image
column existed, and the silent early return threw nothing for S4 to catch).
S9 covers back-to-top now that main.js solely owns it, including the history
entry the removed inline copy lacked.
CLAUDE.md attributed css-compiled/ and fonts/ to css/style.css and
css/tokens.css. They are built from the js/src/ entrypoints' CSS and font
imports; css/ is hand-authored and served directly, needing no rebuild.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
m038andClaude Opus 5
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