e69d2fda8a
A sent message accented a `/skill` named mid-prose and nothing else, so an `@file:` ref and an `[[ Image 1 ]]` token flattened into body text. The composer painted none of it. splitComposerHighlights covers the whole vocabulary the desktop chips — `/work` invoked or referenced, every `@ref` shape including quoted values, and attachment/paste tokens — and both surfaces read it, so what you type is what you see once it lands. Supersedes splitSlashSkillRefs.