The split between the chain list and the params sat at a fixed 300 px,
wrong for a short chain and for a long one alike. It now rests under the
chain's rows, growing with the chain up to eight stages before the list
scrolls. Once the user drags it, it stays put; a double-click on the
handle fits it to the rows again.
GtkPaned sizes the fixed pane from its minimum height, which is only the
drag floor here, so the fit is done by hand from the natural height.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The sidebar grew crowded as the chain got longer. The chain and the params
of the selected stage now share a Chain tab through a vertical split the
user drags, and the sources, canvas and seed move to a Setup tab. Stage
rows are compact, with their move and remove buttons shown only on the
hovered, selected or focused row.
Add effect had stopped opening: its menu of fifteen effects no longer fit
below the button, and GTK does not show a popover that does not fit. The
menu now scrolls past 480 pixels, and the button sits beside the chain
heading, where the split cannot push it down the screen.
The window code becomes an effector_gui library so a new GUI test binary
can drive the real window under Xvfb; ctest skips it when xvfb-run is
missing.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
