Realign code with the 2026-07-31 rulings

The trash sorts by modified descending — the arrival rank mint retires
(Ranks.isOrderedForTrash one comparator, loader + merged order agree;
the legacy deleted: migration stamps modified from the tombstone
timestamp where parseable; delete undo steps validate existence-only;
agent guide v8). Trash selection goes kind-blind — ranges, marquee,
Select All, and the successor walk sweep both kinds; the guard moves to
the exits (mixed-payload drop refusal, copy/cut validation). The copy
stamping preflight widens back to comment depth (load-scoped posture —
the board always loads, the gesture refuses whole). Fixes a latent
no-op: trashed-lane drag restore never fired (DragSession.beginLanes
hard-coded the board container).

2403 tests in 413 suites green.

Claude-Session: https://claude.ai/code/session_01CqjXB7ASoWtbyoGod68k97

Kanban/UI/Board/TrashLaneView.swift

@@ -12,7 +12,7 @@ import SwiftUI
 ///
 /// **Its cards are ordinary cards in a special place**, so there is nothing to derive and nothing
 /// to draw differently: the column renders `store.snapshot.trash` — which the loader parsed with the
-/// same card parse the lanes use and sorted by `order` like any lane's children — through the very
+/// same card parse the lanes use and sorted by `modified` descending, the trash's own order — through the very
 /// same `CardFaceView` a lane renders. "A trashed card is an ordinary card in a special place —
 /// search, selection, rendering, styling, and clipboard all treat it exactly like any other card"
 /// (03 § Trash), and one view is the only way to make *rendering* literally true rather than
@@ -24,11 +24,11 @@ import SwiftUI
 /// **A trashed lane is an opaque unit** — "one distinct dimmed row showing its title and held-card
 /// count … no styling accents, never expandable" (03 § Trash) — so it gets its own small view
 /// (`TrashLaneRowView`) rather than a third card-face role: what a card face draws is exactly what
-/// the design says this row must not. The two kinds **interleave purely by trash rank**, which is
+/// the design says this row must not. The two kinds **interleave by `modified` descending**, which is
 /// `BoardModel.trashEntries`' merge and not a second one written here.
 ///
-/// Newest-first falls out of the ranks (every arrival of either kind mints one above the current
-/// top), so there is no timestamp sort and no entry type here at all.
+/// Newest-first falls out of the stamp (every arrival of either kind restamps `modified` on the way
+/// in — 03 § Trash, re-ruled 2026-07-31), so no rank is minted anywhere in this container.
 ///
 /// ### What makes it a column and not a lane
 ///
@@ -52,9 +52,9 @@ import SwiftUI
 /// trash, lanes extended 2026-07-29) — the drag becomes the pointer's delete gesture, and release
 /// moves the dragged item(s) into `.trash/`. So the column declares an `onDrop`
 /// (`TrashDropDelegate`), and it is the narrowest one on the board: a board drag from **this** board,
-/// unmodified. It diverges from every other drop in one way, and the ranks are what make the
-/// divergence honest: **the shadow always takes the topmost row**, because every arrival mints a rank
-/// above the current top.
+/// unmodified. It diverges from every other drop in one way, and the stamp is what makes the
+/// divergence honest: **the shadow always takes the topmost row**, because every arrival restamps
+/// `modified` and the column is sorted by it, newest first.
 ///
 /// The drag *out* is the restore, and it is deliberately not special at either level: a trash card's
 /// drag is an ordinary `.cards` session in the `.trash` container
@@ -155,8 +155,9 @@ struct TrashLaneView: View {
         ))
     }
 
-    /// The rows the column shows — **both kinds, interleaved by rank** (03-board-ui.md § Trash:
-    /// "Lane rows and cards interleave in the one trash column purely by trash rank").
+    /// The rows the column shows — **both kinds, interleaved by `modified` descending**
+    /// (03-board-ui.md § Trash: "Lane rows and cards interleave in the one trash column by `modified`
+    /// descending").
     ///
     /// **Shown, the trash's contents "participate in the filter exactly like any other card"**
     /// (03 § Trash — "the point of the pivot"), so the search predicate narrows this collection