Materialize the trash — faces, menus, and grammar

Phase 3 finishes the pivot at the surface. One card face serves two
containers: CardFaceView extracted with a role — board or trash — so
stripe, tint, chip, selection stroke, cut dim, marquee registration,
and drag are shared by construction, the trash side differing only in
its absences: no Open, no rename, no Style, no file-hover highlight,
and a Delete that goes through the confirmation host. The column
rewrote around the lanes' own single-column masonry so drag reflow
reads as positional slides; chrome stays the hatched header, symbol,
and count — 11 gives Empty Trash to the File menu alone. Two real
grammar bugs die here: plain Backspace on a trash selection purged
without the confirmation the menu raises, and the context menu's
Delete resolved against the standing selection, so right-clicking a
trash card under a board selection silently did nothing — it now
stages the clicked set explicitly. Open, Rename, Style, and Empty
Trash validation became testable store seams; the column is one named
accessibility container of ordinary card elements. The tombstone era
is swept: deleteItem, restoreItem, stripTombstonedChildren — dead
since lane copies stopped nesting trash — the restore verb, the
unreachable put-back banner row, and every quasi-lane doc comment.

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

KanbanTests/InertGitTests.swift

@@ -176,8 +176,19 @@ struct BaseInertGitTests {
             order: nil,
             stamps: .fork
         )
-        try BoardWriter.deleteItem(at: board.url("\(board.laneA)/\(board.card1)"))
-        try BoardWriter.restoreItem(at: board.url("\(board.laneA)/\(board.card1)"))
+        // The delete and its restore are both folder moves now (03-board-ui.md § Trash), which is
+        // the pair most likely to notice a `.git` at the root: the first walks into `<root>/.trash/`
+        // and the second walks back out of it.
+        try BoardWriter.deleteCardToTrash(
+            at: board.url("\(board.laneA)/\(board.card1)"), inBoard: board.root, order: 1024
+        )
+        _ = try BoardWriter.moveItem(
+            at: BoardWriter.trashFolder(inBoard: board.root).appendingPathComponent(board.card1),
+            toParent: board.url(board.laneA),
+            sourceBoardRoot: board.root,
+            destinationBoardRoot: board.root,
+            order: nil
+        )
         // The renumbers are the pointed ones: both walk a parent's whole directory listing, which
         // is where a `.git` entry actually gets looked at.
         try BoardWriter.renumberVisibleChildren(of: board.root)