Batch of eleven Minor design-review fixes across the corpus

- 02: welcome counts are live items only; failed first opens still record;
  duplicate-identity registry records merge silently (newest wins);
  BoardStore's FolderWatcher pointer reads "below"
- 11: lane-header new-card button inventoried (click names its target lane,
  overriding 04's ⌘N rule — cross-referenced there); attachments quiet-add
  affordance listed as a twin; Undo/Redo and Pull/Push rows gain the
  abnormal-state pause, read-only lock, and unresolvable-remote conditions;
  welcome scope added to Reveal in Finder
- 03/11: one lane context menu (header or empty space) with the full
  inventory, replacing the split rows
- 09: instantiated boards are never in git mode — actual mode follows
  detection at the destination (repo-nested possible)
- 08: the app never writes an existing CLAUDE.user.md; one-time rescue
  creation stated as the exception
- README: pathfinder path corrected to ../../Kanban

Claude-Session: https://claude.ai/code/session_01HJ7PhFNmQ19bvy9RMD6GSb

DESIGN/11-command-nexus.md

@@ -27,14 +27,14 @@ The single source of truth for **every command and action the app can perform**
 | File | Board Info (opens the board popover) | ⌘I | Board window |
 | File | Duplicate (the board — a Finder-style "copy" sibling, 03 ▸ Welcome; never the selection) | ⇧⌘S | Board window |
 | File | Save as Template | — (no default) | Board window; 09-templates.md |
-| File | Reveal in Finder | — (no default) | Board window: the selection's folder(s), or the board root with nothing selected; card window: the card's folder — the selected attachment's file instead when the attachments section is focused |
+| File | Reveal in Finder | — (no default) | Board window: the selection's folder(s), or the board root with nothing selected; card window: the card's folder — the selected attachment's file instead when the attachments section is focused; welcome: the selected recent's folder (disabled on unavailable rows) — the context-menu entry's required twin |
 | File | Add Attachment… | ⇧⌘A | Card window |
 | File | Delete | ⌘⌫ | Board window, live selection (chord twin of Put Back — validation enables exactly one). Deliberately **not** extended to the card window: an enabled ⌘⌫ key equivalent would steal delete-to-line-start from the window's text surfaces, so there the card's delete is the sidebar Actions button (05) |
 | File | Put Back | ⌘⌫ | Board window, tombstoned selection (chord twin of Delete) |
 | File | Delete Immediately | ⌥⌘⌫ | Board window, tombstoned selection; confirmed on boards without git history (mode none / repo-nested), immediate on git boards — 03 ▸ Trash |
 | File | Empty Trash… (confirmed) | ⇧⌘⌫ | Board window, trash shown and non-empty |
 | File | Close | ⌘W | Any window; flushes per 02 ▸ Windows |
-| Edit | Undo / Redo (M−) | ⌘Z / ⇧⌘Z | Focus-routed (06 ▸ Undo routing): text undo in a focused editor, git undo otherwise; git undo disabled on no-git and repo-nested boards |
+| Edit | Undo / Redo (M−) | ⌘Z / ⇧⌘Z | Focus-routed (06 ▸ Undo routing): text undo in a focused editor, git undo otherwise; git undo disabled on no-git and repo-nested boards, during 06's abnormal-state pause (detached HEAD, in-progress merge/rebase), and under the read-only lock (02) |
 | Edit | Cut / Copy / Paste | ⌘X / ⌘C / ⌘V | Board window: cards and lanes (cards-XOR-lanes selections; lane paste lands after the anchor lane — 04 ▸ Clipboard; on a zero-lane board only a lane payload pastes — 04 ▸ ⌘N target rule); in the trash, ⌘C copy-out only (card and lane entries), ⌘X disabled (04 ▸ The trash); text editors: standard text clipboard |
 | Edit | Select All | ⌘A | Board: all visible live cards (filter-respecting); text editors: the text |
 | Edit | Find | ⌘F | Board window: board search (04 ▸ Search); card window: find-in-text (05) |
@@ -45,7 +45,7 @@ The single source of truth for **every command and action the app can perform**
 | Board | Move Up / Move Down | ⌥⌘↑ / ⌥⌘↓ | Card selection within one lane (within-lane sort, logical order; non-contiguous selections gather behind their first card on the first press); disabled when the selection spans lanes; inert on lanes and on tombstoned cards |
 | Board | Move Left / Move Right | ⌘← / ⌘→ | Lane selection only (one slot; never into the trash) — cards cross lanes by drag or Cut/Paste, not ⌘-arrows |
 | Board | Increase Lane Width / Decrease Lane Width (the stepper's re-divide semantics, never the window's size — 03 ▸ Lane) | ⌥⌘→ / ⌥⌘← | Selected lane |
-| Board | Pull / Push | — (no default) | Remote-backed boards only (07); popover twins exist |
+| Board | Pull / Push | — (no default) | Remote-backed boards only (07); disabled during 06's abnormal-state pause (the whole git surface holds) and on an unresolvable remote (07's one-time remote picker case); popover twins exist |
 | View | Show Trash (checkmark toggle) | — (no default) | Board window — ⇧⌘T is deliberately left to the system's Show Tab Bar: window tabbing stays enabled (settled; see Standard macOS furniture), so the chord is the system's; assign one via the remapping mechanism if wanted (04 ▸ Configurable bindings) |
 | View | Edit Body (checkmark toggle) | ⌘E | Card window; disabled while Raw Source is active |
 | View | Raw Source (checkmark toggle; toggling off = Apply) | ⌥⌘E | Card window |
@@ -78,6 +78,7 @@ All board grammar keys are inert while a title editor is focused, and menu dispa
 - **Lane edge drag** (03 ▸ Lane): window-growing resize between integer widths — the one width control that moves the window.
 - **Finder file drops** (04): onto a card = attach; onto lane empty space = one card per file; anywhere on the card window = attach (05's payload-split precedence).
 - **Preview** (05): task-list checkbox toggle (the one interactive exception), link opens, text selection; carousel paging on the card face (03). **In-content controls aren't P-only** (settled): checkboxes and links are real controls in the focus/accessibility tree, so Full Keyboard Access + Space and VO-Space reach them (05 ▸ Task-list checkboxes) — content rides the system focus model rather than earning command rows; "a command absent here doesn't exist" scopes to commands, not content.
+- **Lane header new-card button** (03, labeled "New card in ⟨lane⟩" — 10): creates in **the button's lane**, appended at the bottom — the click names its target, overriding 04's selection-derived ⌘N target rule (settled); placeholder and abandon semantics exactly as ⌘N. The card window's attachments-section **quiet add affordance** (05) is the same class: a pointer twin of File ▸ Add Attachment…, no separate behavior.
 - **Attachment rows** drag out their file URL (05). **Welcome rows**: single click selects, double click opens (03).
 
 ## Context menus
@@ -86,9 +87,9 @@ Context menus are the per-item action inventory VoiceOver reads (10 ▸ The boar
 
 | Surface | Entries |
 |---|---|
-| Card / lane | Open (cards), Rename, Style…, quick-style recents row (03), Delete |
+| Card | Open, Rename, Style…, quick-style recents row (03), Delete |
+| Lane | One menu, invoked on the header or lane empty space (settled — a full lane still has its header): Rename, Style…, quick-style recents row (03), Width control (stepper — menu twins Increase/Decrease Lane Width), Delete |
 | Trash entries | Put Back, Delete Immediately, Reveal in Finder (inspection before a purge; twin of File ▸ Reveal in Finder, which is not edit-shaped and stays enabled on tombstoned selections — 04 ▸ The trash) |
-| Lane header | Width control (stepper — menu twins Increase/Decrease Lane Width) |
 | Attachment row | Open, Remove (system Trash) — twins of the focused section's grammar keys (Return / ⌫ — 05); Reveal in Finder — twin of File ▸ Reveal in Finder in its attachments-focused context |
 | Welcome recent | Open, Reveal in Finder, Forget (C — registry management, welcome-scoped) |