The triage band answers the common case above the fold, so the full edge list is
reference rather than the first thing to read. Same caret and keyboard handling
as the collapsible panels on the same page.
The card stays: it is the only surface with Add and delete, and it keeps each
edge's exact type where the band deduplicates by asset - on a printer, four rows
collapse to two chips and which machine DEFAULTS to it is lost.
The header count is of RENDERED items, not raw edges: a symmetric Dualpath link
is stored in both directions, so counting edges read 3 above a card showing 2.
Frontend 280 passed.