The Bhote Koshi layer keeps its panel controls as plain records and
presents them to a store; the context rail renders the panel as its last
child and marks itself while it is on. Controls are bound to the enable
that published them, and an unchanged frame is not sent again.
createImagerySplit keeps the divider's value, drag, keyboard, CSS position
and scene split, and publishes its line to the imagery split store.
ImagerySplitView, in the scene chrome, teleports each line to the body, so
recent imagery and the Bhote Koshi event no longer build divider DOM.
Retain active-flight preloading while canceling hidden frames and pending Facebook sessions on stop, disable, and replacement. Add lifecycle and pointer-ownership regression coverage. Apply the runtime formatting adopted on main and keep the existing source-shape check insensitive to that formatting.
Sameh Khamis