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

Kanban/UI/Board/ClipboardCommands.swift

@@ -4,8 +4,8 @@ import SwiftUI
 // MARK: - The Edit menu's clipboard row
 
 /// Edit ▸ Cut / Copy / Paste (⌘X / ⌘C / ⌘V) on the board — 11-command-nexus.md's Edit row, whose
-/// scope is "Board window: cards and lanes … in the trash, ⌘C copy-out only (card and lane entries),
-/// ⌘X disabled … text editors: standard text clipboard".
+/// scope is "Board window: cards and lanes … in the trash, ⌘C copies out and ⌘X/⌘V is the keyboard
+/// restore path … paste never targets the trash; text editors: standard text clipboard".
 ///
 /// ### Why this is a responder answer and not three menu items
 ///
@@ -57,13 +57,13 @@ extension View {
 
     /// **Cut items dim in place until paste moves them** (04-interactions.md ▸ Clipboard).
     ///
-    /// The same reduced opacity a trash row wears while it is being dragged, and for the same reason:
+    /// The same reduced opacity a trash card wears while it is being dragged out, and for the same reason:
     /// the item is still there, still selectable, still the user's — it is simply spoken for. A cut
     /// item is deliberately *not* lifted out of the layout the way a dragged one is; a Finder-style
     /// deferred cut promises the board looks unchanged until the paste lands.
     ///
     /// Membership is read straight off `TransientBoardState.pendingCut`, which is where the rules
-    /// already live: a reload ejects a tombstoned or vanished member (so a deleted cut card undims by
+    /// already live: a reload ejects a member that crossed into the trash or vanished (so a deleted cut card undims by
     /// itself), and `ClipboardStore` clears the set outright when the cut is consumed or voided.
     func cutTreatment(of id: ItemID, in store: BoardStore) -> some View {
         opacity(store.transient.pendingCut.ids.contains(id) ? ClipboardTreatment.dimmedOpacity : 1)