The assignee/label/milestone combobox and @-mention list were inline
absolute-positioned inside the ContextPanel rail (overflow-hidden) and the
PR-view scroll container, so the panels were clipped and invisible. Render
both via createPortal to document.body with fixed positioning computed from
the trigger's viewport rect (viewport-edge clamping, flip to the other side
when there is no room), close on outside pointerdown/scroll/resize while
still allowing interaction inside the panel, and keep the panel inside the
outside-click check.
Also show the loading spinner until the first lookup completes instead of a
brief 'No matches' flash (useForgeLookup now reports 'initialized').
bot-hermes
a87b3fd228