The palette sized its scroll window by entry count (`popup_height - 7`)
while the same fixed-height popup also rendered the 9-line header plus
per-section labels and separators. Those uncounted rows pushed the selected
entry past the bottom clip line, so pressing Down made the cursor vanish and
the list appear frozen until the index finally exceeded the oversized budget.
Size the window against the real rendered cost: subtract the actual header
height and account for section labels/separators when choosing the visible
range, guaranteeing the selection stays on screen and the list scrolls.
Adds unit tests for the window helper.
https://claude.ai/code/session_01MQrnh6wHfrEYN5BBdMarC1
Claude
e95f759cd8