The alerts list is the one screen where staleness is genuinely
harmful — an operator can be looking at an Open tab that's already
been resolved by another admin or auto-resolved by the engine, and
take action on a row that no longer exists.
Add an htmx poll on just the table panel:
hx-get same URL with current querystring (filters preserved)
hx-trigger every 15s, only when document is visible (no idle CPU)
hx-select #alerts-table — pull this element out of the response
hx-swap outerHTML
Polling lives on the table div, not the page root, so the filter
strip and header don't flash on each tick. Header gains a small
'live ●' label so the polling is discoverable.
RefreshURL is r.URL.RequestURI() on the server side — keeps any
status/severity/host_id/q params intact across refreshes.
Other screens (dashboard, hosts, jobs) deliberately stay manual-
refresh per the project's anti-flicker stance.
Spotted during the live Playwright sweep: clicking Acknowledge or
Resolve updated the alert row but never fanned out a notification.
The handlers went straight to Store.Acknowledge/Resolve, bypassing
the hub.
Add Engine.Acknowledge and Engine.Resolve that wrap the store call
and dispatch the matching event to every enabled channel. The UI
handlers prefer the engine path when wired, and fall back to the
direct store call so unit tests that construct a Server without an
engine still work.
Use context.WithoutCancel for the goroutine dispatch — the request
context is cancelled the instant the handler returns 204, so the
naive 'go e.hub.Dispatch(ctx, ...)' was racing the response and
losing the channel-list query with 'context canceled'.
Flagged in review of 35dee98: the Alerts tab badge should show the
open count from any page, not just /alerts. baseView now takes the
request and queries store.ListAlerts(Status: "open") to fill
view.OpenAlerts on every page render. All call sites updated.
steve