Pivot the trash to a materialized .trash — cards only, no Put Back

The tombstone model is retired wholesale: deletion is a move into the reserved
<root>/.trash/, always entering at the top (rank minting — no deleted: key, no
timestamp sort), with modified stamped for the future age-based purge. Lanes
are never trashed — lane delete is physical, native undo in-session the net.
Put Back is gone: restore is drag-out or cut+paste (⌘X now enabled in the
trash as the keyboard restore path). Trash cards are ordinary cards — search,
selection, clipboard, and rendering uniform — and one container boundary
replaces the effective-liveness, ancestor-walk, and kind-homogeneity machinery
across 02 and 04. Delete stages by place (board moves, trash deletes
permanently under the recoverability confirm); legacy deleted: keys migrate
without destroying (cards relocate, lanes return live, notices). Templates
exclude .trash; Duplicate carries it; the agent guide teaches delete-as-move.
Materialized reserved lanes are named as a pattern — .archive is WISHLIST #8,
and the backed-out release-presentation question is marked open in 03.

Ruling: Redesign board Resolved card e8f1a6c2; 19 mooted tombstone-era rulings
moved to the board's new Mooted lane.

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

DESIGN/06-history-undo.md

@@ -2,7 +2,7 @@
 
 **Edition scope: Lanework Pro** (12-editions.md). This doc is the git HistoryProvider; base Lanework ships mode:none only, with macOS-native undo (13-native-undo.md) and the inert-`.git` posture (12). The Undo routing section below is edition-independent — both substrates dispatch through it.
 
-Git is the undo substrate — on boards that have git. **Git is opt-in per board (a pivot from the pathfinder, which auto-initialized every board): a board may be created without git, and git can be added later** (via the board popover; see 07-sync-collab.md's mode progression). A board without git has **no undo/redo** (board history, that is — text editors keep their standard typing undo everywhere; see Undo routing below) — consistent with the settled no-undo stance for repo-nested boards; deletes are the exception, recoverable on every board via the tombstone trash (03-board-ui.md). On git-enabled boards, every settled change auto-commits; those mechanics are carried over from the pathfinder with their hard rules intact.
+Git is the undo substrate — on boards that have git. **Git is opt-in per board (a pivot from the pathfinder, which auto-initialized every board): a board may be created without git, and git can be added later** (via the board popover; see 07-sync-collab.md's mode progression). A board without git has **no undo/redo** (board history, that is — text editors keep their standard typing undo everywhere; see Undo routing below) — consistent with the settled no-undo stance for repo-nested boards; card deletes are the exception, recoverable on every board via the materialized trash (03-board-ui.md; lane deletes lean on native undo in-session — 13-native-undo.md). On git-enabled boards, every settled change auto-commits; those mechanics are carried over from the pathfinder with their hard rules intact.
 
 ## Rules
 
@@ -30,7 +30,7 @@ Git is the undo substrate — on boards that have git. **Git is opt-in per board
 The pathfinder's message engine carries over as the model — it is what earns the "semantic" in semantic commit messages, and it stays a pure, testable function:
 
 - **Pure snapshot diff, no write-site tagging.** Messages compose at commit time from a structural diff of two board snapshots (last-committed vs. current) — never by intercepting operations. Items match by id across the *whole* board, so a lane change is distinguishable from delete+add and a cross-lane move reads as a move. Bookkeeping — `order` changes that preserve sibling sequence (a renumber's rescale — 01-storage-format.md), `modified`/`created` — produces no events: a diff touching only those composes nothing. Sequence is what the diff compares, not raw `order` values: an order change that *repositions* an item among its siblings composes Reorder, so a foreign writer's single-file reorder still reads as one. A midpoint-exhaustion renumber batches with the insert or move that triggered it, so its commit reads as that event.
-- **Vocabulary**: Add / Delete / Move / Rename / Edit / Restyle / Resize / Reorder over cards, lanes, and the board, plus Attach / Remove for attachment files ("Move card 'Fix login' to Doing", "Rename lane 'Todo' → 'Doing'"), plus **Repair** for the duplicate-id remint ("Repair duplicate of 'Fix login'" — 01-storage-format.md's banner-gated fix; app-mediated, so the composer names it directly instead of reading the folder swap as Permanently delete + Add), plus the trash pair (settled) — **Restore** and **Permanently delete** — distinguished by diff shape alone, keeping the composer a pure snapshot diff: `deleted:` appearing is Delete (the tombstone), `deleted:` *clearing* is Restore ("Restore card 'X'" — Put Back, drag-to-restore), and an item *leaving the tree entirely* is Permanently delete ("Permanently delete card 'X'" — Delete Immediately, Empty Trash, and any foreign hard removal, which the shape rule catches and describes accurately for free). The trail thereby tells moved-to-trash from gone-forever — the distinction Deleting never forgets (below) asks users to learn. Plural folding applies as usual: Empty Trash reads "Permanently delete 12 cards", cleanly distinct from a multi-select ⌫'s "Delete 12 cards". One commit per debounce window: a single event is the subject (with a detail body where one helps); several events of one kind fold into a plural subject, with shared destinations preserved ("Move 3 cards to Done"); genuinely mixed windows fall back to "Update board" — always with a bulleted body naming every event, so the oneline log stays scannable and the full message stays complete.
+- **Vocabulary**: Add / Delete / Move / Rename / Edit / Restyle / Resize / Reorder over cards, lanes, and the board, plus Attach / Remove for attachment files ("Move card 'Fix login' to Doing", "Rename lane 'Todo' → 'Doing'"), plus **Repair** for the duplicate-id remint ("Repair duplicate of 'Fix login'" — 01-storage-format.md's banner-gated fix; app-mediated, so the composer names it directly instead of reading the folder swap as Permanently delete + Add), plus the trash pair (settled) — **Restore** and **Permanently delete** — distinguished by diff shape alone, keeping the composer a pure snapshot diff: a move into `.trash/` is Delete, a move out of it is Restore ("Restore card 'X'" — drag-to-restore, cut+paste), and an item *leaving the tree entirely* is Permanently delete ("Permanently delete card 'X'" — Delete Immediately, Empty Trash, and any foreign hard removal, which the shape rule catches and describes accurately for free). The trail thereby tells moved-to-trash from gone-forever — the distinction Deleting never forgets (below) asks users to learn. Plural folding applies as usual: Empty Trash reads "Permanently delete 12 cards", cleanly distinct from a multi-select ⌫'s "Delete 12 cards". One commit per debounce window: a single event is the subject (with a detail body where one helps); several events of one kind fold into a plural subject, with shared destinations preserved ("Move 3 cards to Done"); genuinely mixed windows fall back to "Update board" — always with a bulleted body naming every event, so the oneline log stays scannable and the full message stays complete.
 - **Implied events don't steal the subject**: deleting a lane with five cards reads "Delete lane 'X'" with the card deletions as body bullets — not "Update board".
 - **Non-snapshot files commit too** (settled — the repo tracks more than the model: the agent guide, `CLAUDE.user.md`, the seeded `.gitignore`, and strays at every level): the committer **stages the whole board root** — whatever `git status` shows, `.gitignore` respected, **open Edit sessions still staged around** (settled): the session card's folder stays excluded exactly as in Rules ▸ Auto-commit, whole-root staging widening *what* commits, never overriding the exclusion — and its commit condition is the *tree*, not the snapshot diff, so a stray-only window commits rather than leaving the tree dirty (firing mid-session, it commits the strays and leaves the session folder untouched) (a permanently dirty stray would break branch switch's cannot-fail-dirty guarantee and void flush-before-overwrite for every file the model can't see). The composer's input extends accordingly: beside the snapshot diff it receives the changed-path list, and non-snapshot paths compose **path-shaped events** — `CLAUDE.md` composes "Update agent guide (vN)", the version read from the guide's marker first line (a pure function of file content, *not* write-site tagging — the no-interception rule stands); any other non-snapshot path composes "Update '⟨path⟩'", folding plural ("Update 3 files"). Model events keep the subject when present; non-snapshot changes then ride as body bullets — recorded, never silently absorbed under an unrelated subject. Attribution needs no new rule: the EchoLedger (02-architecture.md) is path-keyed, so the app's guide write classifies app-mediated by its receipt (the mechanism behind the guide-attribution exception below) and a stray edit classifies foreign, the two-commit split applying per file as everywhere else.
 - **Titles truncate in subjects only** (~40 chars, keeping `git log --oneline` sane); body lines carry full titles. An untitled item reads "(untitled)" — never a bare `""` (a pathfinder edge fixed, not carried). Undo/redo restores commit as "Undo: ⟨subject⟩" / "Redo: ⟨subject⟩"; the undo-menu labels are the *crossed* commit's subject, so labels never nest.
@@ -70,7 +70,7 @@ Agent and hand edits arrive through the watcher like any change and get auto-com
 
 - **`.gitignore` seeded at init, never touched after.** Adding git to a board writes a minimal `.gitignore` (`.DS_Store`) if none exists; the app never edits an existing one and never manages the file afterward — it's the user's from then on. (Repo-nested boards have no app-managed git, so no app `.gitignore` either.)
 - **Repo growth is accepted.** Unbounded history is the price of never-rewrite, and every attachment version lives in the repo forever. The app may run safe libgit2 housekeeping (repacking loose objects) periodically — it rewrites nothing. Content-removing compaction is explicitly out (it would rewrite history); size tooling joins the wishlist if growth ever bites in practice.
-- **Deleting never forgets.** On a git board, deleting a card removes it from the board but never from history — every version of its content and attachments stays reachable in any git client, and even the future tombstone purge (01-storage-format.md) only cleans the working tree. This is part of the design; users should learn it here, not from a repo browser.
+- **Deleting never forgets.** On a git board, deleting a card removes it from the board but never from history — every version of its content and attachments stays reachable in any git client, and even a trash purge (Empty Trash, or the future age-based auto-purge — 01-storage-format.md) only cleans the working tree. This is part of the design; users should learn it here, not from a repo browser.
 
 ## Changes from Kanban