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/SearchFilterTests.swift

@@ -336,6 +336,28 @@ struct SearchFilterOrderTests {
         #expect(SearchFilter.inactive.visibleIDs(in: model, container: .trash) == [card1, card2])
     }
 
+    /// The trash *column* narrows through the same predicate, which is the whole of "shown, its cards
+    /// participate in the filter exactly like any other card — the point of the pivot"
+    /// (03-board-ui.md § Trash). `LaneView.rendered`'s trash-side twin, pinned the same way: the
+    /// column, its count badge and its marquee registration all read this list, so one answer keeps
+    /// them in step.
+    @Test("The trash column renders exactly what navigation and Select All walk")
+    func trashColumnRendersTheFilteredCards() throws {
+        let fixture = try makeTrashBoard()
+        defer { fixture.tearDown() }
+        let model = try load(fixture)
+
+        #expect(TrashLaneView.rendered(model.trash, filter: .inactive).map(\.id) == [card1, card2])
+        #expect(TrashLaneView.rendered(model.trash, filter: SearchFilter(query: "login")).map(\.id) == [card1])
+        // The column and the arrow grammar cannot disagree about what is on screen.
+        #expect(TrashLaneView.rendered(model.trash, filter: SearchFilter(query: "login")).map(\.id)
+            == SelectionGrammar.trashCards(in: model, filter: SearchFilter(query: "login")))
+        // A query nothing matches empties the column without emptying the container — which is why
+        // Empty Trash's validation reads `.trash/` and not this list.
+        #expect(TrashLaneView.rendered(model.trash, filter: SearchFilter(query: "zzzz")).isEmpty)
+        #expect(!model.trash.isEmpty)
+    }
+
     @Test("The delete successor is drawn from what the lane is showing")
     func successorSkipsHiddenSiblings() throws {
         let fixture = try makeBoard()