chore: update nix and node

CHANGELOG.md

development/issues/closed/237.html

development/issues/closed/237.mjs

development/issues/open/226.html

development/issues/open/226.mjs

development/issues/open/test.jpeg

flake.lock

nix/config/release.nix

package.json

pnpm-lock.yaml

source/components/layout/collapse.mjs

source/components/layout/panel.mjs

source/components/layout/slider.mjs

source/components/layout/split-panel.mjs

source/components/layout/style/panel.pcss

source/components/layout/style/split-panel.pcss

source/components/layout/stylesheet/panel.mjs

source/components/layout/tabs.mjs

source/components/layout/width-toggle.mjs

source/components/tree-menu/tree-menu.mjs