After install completes, the async-spawn wrapper wrote state=Running
but the skeletal install-time manifest (interfaces: None) persisted
until the next scheduled 60s scan. The frontend saw state=running but
hasUI=false and hid the Launch button for up to a full minute.
Add a shared Notify/watch pair between RpcHandler and the scan loop:
- scan_kick (Notify): scan loop selects! between the 60s interval
and this notify, running immediately on either.
- scan_tick (watch<u64>): scan loop bumps the counter after each
completed scan so callers can await completion.
Install and update success paths now call kick_scanner_and_wait before
flipping to Running. The scan merges via merge_preserving_transitional
(state stays Installing/Updating, manifest refreshed from live podman
with interfaces.main.ui populated from real port bindings). 2s timeout
falls back to pre-fix behavior on slow podman — no regression.
980c1b25f4