develop
feat(muya): restore flowchart and sequence diagrams (#4385)
feat(muya): migrate TS rewrite to packages/muya alongside legacy muyajs (#4314)
test(muya): backfill engine unit coverage for post-migration gaps (#4589)
fix(muya): call h1-h6 "headings" not "headers" in the insert menu (#3811) (#4854)