fix(gui): console toggle pushes editor up and breaks scroll

[bwyard]

Summary

When the console panel is toggled open or closed, the code editor above it shifts position. After the toggle, the editor cannot be scrolled back to the correct position — the layout breaks until the window is resized or the app is reloaded.

Steps to reproduce

1. Open Score Studio with a song loaded
2. Open the console panel (bottom of the screen)
3. Edit code in the editor — scroll down to see lower lines
4. Toggle the console closed
5. The editor jumps up — scroll position is lost and the top of the editor is partially off-screen or clipped

Expected

• Console toggle should not affect editor scroll position
• The editor panel height should recalculate smoothly when the console opens/closes
• No layout shift — flex/grid layout should absorb the height change

Likely location

packages/gui/src/renderer/components/LiveCode/ — the layout container that holds the editor and console as a split. The resize/collapse animation may not be triggering a CodeMirror/Monaco layout recalculation.

Notes

• This is especially bad when working in long song files — losing scroll position mid-edit breaks flow
• Check if editor.layout() (Monaco) or equivalent is called after the console height changes
• May need a ResizeObserver on the editor container to auto-recalculate

Related: the instrument panel and import toggle may have the same class of bug.