The device/status dropdown menu is absolutely positioned inside the session
list's overflow-x-auto wrapper. Because overflow-x:auto forces overflow-y:auto,
a menu taller than a short table was clipped (issue #39). Open the menu with
position:fixed anchored to its toggle so it escapes the clipping ancestor,
bound it to the viewport with an internal scroll, flip it up when there is more
room above, and reposition on scroll/resize while open.
Fixes#39.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
