The script entry's flat instance <select> is replaced by the shared
InstancePicker combobox (design 2026-09-08 §3): the site's areas load
alongside its instances in LoadInstancesAsync and are held in fields, so the
picker sees one stable list reference per site and only closes its panel on a
real site change. Picking a row raises the id, which OnInstancePickedAsync
applies before running the unchanged OnInstanceChangedAsync — the deep link,
the localStorage restore and the site-scope gate are untouched.
Tests: the five instance-select .Change("7") call sites go through a
PickInstance helper (open the panel, click the data-instance-id row), plus a
new test that areas open collapsed and only reveal the instance once both
levels are expanded, and one that ?instanceId= shows the instance name in the
picker field.
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
Joseph Doherty
0f97317933