An org body's Edit sheet opened on Markdown. ComposeSheet stored the format as Binding<String>?, which is not a dynamic property, so the sheet body never re-ran after the binding took the stored format. Now a real @Binding plus a showsFormat flag; the release call site is unchanged.
Reproduced and verified in the simulator with the real IssueView against a stubbed issue show returning body_format: org. The live smoke edit flow gains an org round-trip on the fixture issue.