In the card layout every VirtualGrid row carries a `transform`, which makes it a
stacking context — so the tag menu's z-index was scoped to its own row and the
NEXT card (a later DOM sibling) painted over it. Same hazard that buried the
players in E3, so the same blessed fix: render the menu through <Overlay> (i.e.
at <body>) with fixed coords instead of `absolute` inside the cell.
The flip-up case anchors the menu's BOTTOM to just above the button so it lands
exactly whatever its real height is, and the horizontal clamp measures the
rendered width rather than assuming px — `w-44` grows with the text-size slider.
Closes on outside click (dismiss now watches the cell AND the portalled menu),
and on page scroll/resize, where a fixed menu would otherwise strand at a stale
anchor. Verified in both layouts by hit-testing the menu's own pixels.
peter
260de48f41