diff --git a/DESIGN/04-interactions.md b/DESIGN/04-interactions.md
index 4e34633..d16141d 100644
--- a/DESIGN/04-interactions.md
+++ b/DESIGN/04-interactions.md
@@ -7,7 +7,7 @@ Selection, drag & drop, keyboard, clipboard, search. This is where the old app s
 - Cards: click selects; ⌘-click toggles; ⇧-click range-extends; click-drag rubber-bands across lanes. Lanes: ⌘/⇧-click multi-select.
 - **The range anchor** (settled — standard macOS list semantics): the anchor is the last plain- or ⌘-clicked item, per board window, transient — never persisted. ⇧-click ranges from anchor to target in the flatten order (cards), lane order (lanes), or the trash's own order — where rows of the other kind are skipped, since lanes rejoined the trash (2026-07-29; The trash below) — replacing the selection and leaving the anchor in place. A marquee and wholesale selections (Select All) set no anchor, so a following ⇧-click acts as a plain click; a reload that drops or liveness-flips the anchor clears it.
 - Selection is **homogeneous**: cards XOR lanes.
-- **Board background** — the margins around and between lanes, and below short content (settled): a plain click clears the selection — the pointer twin of Escape's deselect, Finder's behavior; modified clicks (⇧/⌘) are no-ops there — extension needs an item to extend to; the background is also a rubber-band origin surface on the live side, alongside lane empty space (live) and the trash column's empty space (trashed).
+- **Board background** — the margins around and between lanes, and below short content (settled): a plain click clears the selection — the pointer twin of Escape's deselect, Finder's behavior; modified clicks (⇧/⌘) are no-ops there — extension needs an item to extend to; the background is also a rubber-band origin surface on the live side, alongside lane empty space (live) and the trash column's empty space (trashed) — which extends the full column height below the last row, card and lane rows alike (re-affirmed 2026-07-29; the rewrites dropped the clause, the ruling never changed): no dead zone, a band can arm from anywhere in the shown trash's column.
 - Lane empty-space: single click selects the lane (click again to unselect); double click creates a card at the bottom, title editor focused. **The lane header is click-to-select too** (settled — a full lane has no empty space left): a plain click on the title bar selects the lane — **and toggles like empty space** (settled): a click on the already-selected lane's header unselects, one lane-click behavior everywhere, so a full lane keeps a pointer path out of selection; the drag surface (03-board-ui.md ▸ Lane) engages only on movement — the click-vs-drag split cards already have.
 - **Clicking never edits** (pivot from the pathfinder's Finder-rename two-stage click): one click selects, and that is all a single click ever does — no slow-second-click rename, no timers, no accidental edit on a hesitant click. Inline rename is **Return** on a sole selected card, or Board ▸ Rename — the menu item is a lane's only rename path, since Return on a lane creates a card (Grammar below). A fast double-click opens the card window (⌘↩'s pointer twin). Committing an empty rename on an existing item removes its `title` key (titles are optional; the face shows the untitled placeholder).