The broadcast grid showed nothing while the agents loaded, and the egress
card a 'loading the … domains' line. They now show grey placeholders in the
shape of what is coming: six agent chips with the real chip's height (160 px,
measured), and three domain rows with their remove buttons.
Hint, ActionRow, Toolbar, EmptyState and ExternalLink replace the muted
text, button row, refresh bar, empty line and _blank anchor that each page
restyled under its own class. ExpandableCard (with a loading twin) holds the
builds and recent-runs cards, which had identical head and body CSS. The
create form's raw checkbox becomes CheckboxField. The components page shows
each new piece.
usePolled reports when a request is in flight (through a new onBusy of the
poller) and holds it on for at least 0.4 seconds, so a quick answer still
reads as a refresh. The picker swaps its clock for the spinner, in the same
box so its width stays, and the spinner stands still where motion is off.
Every page with a picker passes it; a page with several polled requests shows
it while any of them runs. The Jobs page fetches through shared components
and has none yet.
Replaces the broadcast button in the messages card's header: a Disclosure
titled broadcast, folded by default, over the messages card. The composer is
built on the first open and kept, so it polls the agent list only once used.
The broadcast page wording in broadcast-types.ts and its test now says
composer.
The messages page gets a broadcast button that opens the agent picker and
message box above the stream, so a sent message shows up in the list below
it. The broadcast route and nav tab go, with no redirect: the page is now the
composer, BroadcastComposer, in the messages page.
Each polling page repeated its own fetch-and-set code on a fixed timer,
so a slow answer could be overtaken by the next tick, an older response
could overwrite a newer one, and nothing aborted a request when the page
went away.
usePolled skips a tick while a request is in flight, aborts on unmount
or refresh, ignores answers from dropped requests, and keeps the last
good data under an error. The alerts, hives, agents, schedules, builds,
review runs and broadcast pages and the subagent list use it.
Pick agents from a grid of their icons (running or all), type the text, send.
The page posts the names and the text to the controller and shows what
happened to each agent, with a retry that selects just the ones that failed.
The selection rules and the controller's answer are read by plain functions
with tests.
