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/App/BoardDuplicator.swift

@@ -9,10 +9,10 @@ import Foundation
 ///   board, where identities could collide; a whole-board copy is a new namespace, and Duplicate's
 ///   fork-keeps-history guarantee requires it (copied `.git` history must keep naming the paths it
 ///   describes)".
-/// - **Tombstoned items are carried too** (03, settled): "Duplicate is a full fork, trash included —
-///   dropping them would leave the copy's working tree disagreeing with its own copied HEAD". This
-///   file does nothing to achieve that: a tombstone is a `deleted:` key inside a file, so a copy
-///   carries it by declining to be clever.
+/// - **`.trash/` is carried too** (03, settled, re-grounded 2026-07-28 for the materialized trash):
+///   "Duplicate is a full fork, `.trash/` included — dropping it would leave the copy's working tree
+///   disagreeing with its own copied HEAD". This file does nothing to achieve that: the trash is an
+///   ordinary folder under the root, so the tree walk carries it by declining to be clever.
 /// - **`.git` comes along** — a duplicate of a git board is a fork of its history — with only its
 ///   remote configuration stripped, which is m7's.
 /// - Timestamps, unknown keys, strays, `CLAUDE.user.md`, attachments: verbatim, for the same reason.