The heading constants move to styles/headings.ts and the filename logic to
storage/documentName.ts, which were all the editor needed of the exporter
at startup. Main chunk 2.1 MB → 1.37 MB (gzip 615 KB → 411 KB).
Both reference products define ten levels but only offer the first five;
visibleStyles() filters styleOrder for the gallery in either chrome, with a
session-only 'show all styles' toggle in the menu. A deeper level a block
already uses stays listed, so the caret always has an active style.
Steffen Becker