Picking a workspace previously expanded the sidebar header inline:
the disclosure list was a normal flex child, so opening it shoved
the home anchor row, every launcher, and the tab list down by ~200
px. User correctly flagged this as a popover, not an accordion.
Move the disclosure under the picker row as an absolute overlay
(`.relative()` on the picker row + `.absolute().top_full()` on the
disclosure) with the existing fade_in animation. Picker row height
stays constant whether the disclosure is open or closed; the list
floats over whatever lives beneath it inside the sidebar's clip.
Picking a space still calls `close_workspace_picker`, and toggling
the pill still hides it. Outside-click dismiss is the next polish
pass.
ZacharyZhang-NY
ed2d8ffac2