[LoopyDev]

A page couldn't be moved to the bottom of a list in the sidebar. A row only took a page above it (its top fifth) or into it (the rest), so nothing could go after the last page. Scan item 3.24's first half.

• Each row now has three zones:
  • its top quarter puts the page above it, as before;
  • its bottom quarter puts it below it, with a blue line under the row;
  • the middle puts it into it.
• Below an open page whose sub-pages are showing is still into it, because what's just below is its first sub-page.
• reorderPages puts the page after the target for "below".

Test (e2e/sidebar.spec.ts), using the browser's own drag events:

• a page dropped on the lower edge of the last top-level page goes last;
• one dropped below the last sub-page of an open page becomes that page's last sub-page;
• the middle of a row still puts a page into it.

It fails on main, where the page went into the last page.

🤖 Generated with Claude Code