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20c337651f
Since #71 the phone's "More" is a bottom sheet, and at the reference viewport it does not fit: measured at 424x439 with the seed's eight destinations, the body is scrollHeight 412 against clientHeight 373, so 39px is below a fold nothing announces. Where the cut lands on a row boundary the sheet ends in a clean edge that reads as the end of the list, which is what #207 fixed one sheet over. The rule is that sheet's, not a second answer to the same question: #207's two background layers move into styles/sheet-scroll.css.ts and both sheets adopt them, with the colour left to each host as --yj-sheet-surface. The nav sheet paints the sidebar's --yj-bg-surface and the context sheet the menus' --yj-bg-elevated, so a shared rule that hard-coded either would draw that seam across the other one. The half that makes it visible is that nothing inside the sheet may repaint the surface. These are layers on the scroller, and app-sidebar's host carries the same grey -- in the shell its own background, in the sheet a second opaque copy of the sheet's, over the fade. With the fragment adopted and that rule missing, the running app measured a flat 52,58,64 to the bottom edge with 39px still below: the defect unchanged, with every assertion about background-attachment passing. menu-surface already meets it from the other side, where the sheet's panel is background-color: transparent. Closes #210