Souveraine.send returns false for a busy turn exactly as it does for a dead
server, and the sidebar rendered every false as "server unreachable" — so
typing while she worked showed the words, then a lie, and dropped the text.
The verbs existed on both sides since 93fe30a and nothing called them.
Type-while-busy now interjects, as the TUI has always done
(src/ui/app/mod.rs:1006). Esc with nothing attached raises a hand. A queued
count sits in the status row and says sent, not read, because 202 from
/interject means only that it was taken.
Deliberately unchanged: the two drain sites and their system/user registers.
Providers disagree about which one they want and that choice is not ready to
be made. Latency is unchanged too — turn.rs:600 runs a whole tool round
without looking, so a note sent into a fifteen-call round waits for it.