feat(lanes): reorder and rename lane cards, and show each file's line delta

The lane strip's tiles are now drag-reorderable (Alt+←/→ is the keyboard
path), and a lane's name can be set in place from the detail header. The
"Lane 23 ·" prefix is gone from both — the bare `#23` stays on the tile,
because that number is how the CLI addresses a lane.

Card order is a per-viewer preference, not a lane fact: it lives in
localStorage (`agenthub.workspace.laneOrder`) beside the split-view layout
and writes nothing server-side, so `GET /api/lanes` and `agenthub lanes`
keep answering in id order. Renaming is the opposite — it is PATCH
/api/lanes/:id with {title}, the one lane column a user now types into
directly.

That made a patch value reachable by hand for the first time, so
`bindable` now rejects any non-scalar for every PATCHABLE column with
EBADFIELD, and the route answers 400 for that and for the
SQLITE_CONSTRAINT family, rather than handing better-sqlite3 a datatype
throw and reporting 500 on plain bad input.

The uncommitted-files tooltip became a real panel. `GET /api/lanes/:id/git`
now returns `files` as {path, status, added, deleted} records — deltas from
one `git diff --numstat HEAD`, null where git has none to report (untracked,
binary, renamed) — and the card renders them portalled to the body, so the
Workspace's own scroll box cannot clip the list.

client/src/components/lanes/LaneCard.tsx

@@ -19,17 +19,18 @@
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
-import { useEffect, useState } from "react";
+import { useCallback, useEffect, useLayoutEffect, useRef, useState } from "react";
+import { createPortal } from "react-dom";
 import { useTranslation } from "react-i18next";
 import { DestructiveLaneModal } from "./DestructiveLaneModal";
 import { api } from "../../lib/api";
 import { eventBus } from "../../lib/eventBus";
 import { keepIfSame } from "../../lib/keepIfSame";
 import type { AiRouter } from "../../lib/api";
-import type { Lane, LaneGitFacts, LaneRuntime, NamedLock } from "../../lib/types";
+import type { Lane, LaneGitFacts, LaneGitFile, LaneRuntime, NamedLock } from "../../lib/types";
 
 /** How often a mounted card re-reads its working-copy facts. Slow on purpose:
- *  each call is three git subprocesses server-side, and a branch name does not
+ *  each call is five git subprocesses server-side, and a branch name does not
  *  change on the timescale the lane list is polled at. */
 const GIT_REFRESH_MS = 30_000;
 
@@ -379,6 +380,141 @@ export function LaneToolsMenu({ lane }: { lane: Lane }) {
   );
 }
 
+/** Porcelain status code -> the letter shown and the colour it is shown in.
+ *  Keyed on the code's first meaningful character, so an index-side change
+ *  (`M `), a worktree-side one (` M`) and both (`MM`) read the same. */
+const GIT_STATUS_STYLE: Record<string, string> = {
+  M: "text-status-warning",
+  A: "text-status-success",
+  D: "text-status-danger",
+  R: "text-accent",
+  C: "text-accent",
+  U: "text-status-danger",
+  "?": "text-fg-muted",
+};
+
+/**
+ * The file list behind a lane's uncommitted counts: which files, what happened
+ * to each, and how many lines it gained and lost.
+ *
+ * It replaced a native `title` tooltip, which could show the same paths but
+ * neither colour them nor align the deltas — and a plain porcelain dump is not
+ * something you read at a glance.
+ *
+ * PORTALLED to `document.body` and `position: fixed`, for the same reason this
+ * file's own header says the tools dropdown was moved out of the card: a lane
+ * card renders inside the Workspace's `max-h-[45vh] overflow-y-auto` box, and
+ * an absolutely positioned panel would be clipped by it for every card that is
+ * not at the very top. It flips above its anchor rather than off the bottom of
+ * the window, and clamps to the right edge.
+ */
+function LaneGitFilesPanel({
+  files,
+  hidden,
+  anchor,
+  onPointerEnter,
+  onPointerLeave,
+}: {
+  files: LaneGitFile[];
+  hidden: number;
+  /** The counts button this panel hangs off. */
+  anchor: HTMLElement | null;
+  onPointerEnter: () => void;
+  onPointerLeave: () => void;
+}) {
+  const { t } = useTranslation(["lanes"]);
+  const panelRef = useRef<HTMLDivElement>(null);
+  const [pos, setPos] = useState<{ top: number; left: number } | null>(null);
+
+  // After the first paint, when the panel's real height is known: place it
+  // under the anchor, or above it when that would run off the bottom.
+  useLayoutEffect(() => {
+    if (!anchor || !panelRef.current) return;
+    const a = anchor.getBoundingClientRect();
+    const p = panelRef.current.getBoundingClientRect();
+    const gap = 4;
+    const top =
+      a.bottom + gap + p.height > window.innerHeight ? a.top - p.height - gap : a.bottom + gap;
+    setPos({
+      top: Math.max(8, top),
+      left: Math.max(8, Math.min(a.left, document.documentElement.clientWidth - p.width - 8)),
+    });
+  }, [anchor, files]);
+  // Totals are over the LISTED files only — the cap means the rest are unknown,
+  // and a total that silently omits them would be a wrong number rather than a
+  // partial one. `hidden` says how many are missing.
+  const added = files.reduce((n, f) => n + (f.added ?? 0), 0);
+  const deleted = files.reduce((n, f) => n + (f.deleted ?? 0), 0);
+
+  return createPortal(
+    <div
+      ref={panelRef}
+      data-testid="lane-git-files"
+      role="group"
+      aria-label={t("git.filesHeading", { count: files.length })}
+      // The pointer has to be able to travel INTO the panel to scroll it, so
+      // the panel answers the same enter/leave pair the trigger does.
+      onMouseEnter={onPointerEnter}
+      onMouseLeave={onPointerLeave}
+      style={{
+        position: "fixed",
+        zIndex: 60,
+        top: pos?.top ?? 0,
+        left: pos?.left ?? 0,
+        // Hidden for the one frame before it has been measured, so it never
+        // flashes at the top-left corner.
+        visibility: pos ? "visible" : "hidden",
+      }}
+      className="max-h-72 w-[22rem] max-w-[calc(100vw-1rem)] overflow-y-auto rounded-md border border-border bg-surface-1 p-2 shadow-lg"
+    >
+      <div className="mb-1.5 flex items-baseline gap-2 border-b border-border pb-1.5 text-[11px]">
+        <span className="text-fg-secondary">{t("git.filesHeading", { count: files.length })}</span>
+        <span className="ml-auto shrink-0 font-mono tabular-nums">
+          <span className="text-status-success">+{added}</span>{" "}
+          <span className="text-status-danger">−{deleted}</span>
+        </span>
+      </div>
+      <ul className="space-y-0.5 font-mono text-[11px]">
+        {files.map((f) => {
+          const code = f.status.trim()[0] || "?";
+          return (
+            <li key={f.path} className="flex items-baseline gap-2">
+              <span
+                className={`w-3 shrink-0 font-semibold ${GIT_STATUS_STYLE[code] || "text-fg-muted"}`}
+                title={f.status}
+              >
+                {code}
+              </span>
+              {/* The DIRECTORY truncates, never the filename: the name is what
+                  you scan for, the path is only there to disambiguate it. */}
+              <span className="flex min-w-0 flex-1 items-baseline" title={f.path}>
+                <span className="truncate text-fg-muted">{f.path.replace(/[^/]+$/, "")}</span>
+                <span className="shrink-0 text-fg-primary">{f.path.split("/").pop()}</span>
+              </span>
+              <span className="shrink-0 tabular-nums">
+                {f.added === null && f.deleted === null ? (
+                  <span className="text-fg-muted">{t("git.noDelta")}</span>
+                ) : (
+                  <>
+                    <span className="text-status-success">+{f.added ?? 0}</span>{" "}
+                    <span className="text-status-danger">−{f.deleted ?? 0}</span>
+                  </>
+                )}
+              </span>
+            </li>
+          );
+        })}
+      </ul>
+      {hidden > 0 && (
+        <p className="mt-1.5 border-t border-border pt-1.5 text-[10px] text-fg-muted">
+          {t("git.filesMore", { count: hidden })}
+        </p>
+      )}
+    </div>,
+    document.body
+  );
+}
+
 export default function LaneCard({
   lane,
   onAction,
@@ -399,6 +535,21 @@ export default function LaneCard({
   const [menuOpen, setMenuOpen] = useState(false);
   const [runtimeBump, setRuntimeBump] = useState(0);
   const [bootLine, setBootLine] = useState<string | null>(null);
+  const [filesOpen, setFilesOpen] = useState(false);
+  const [countsAnchor, setCountsAnchor] = useState<HTMLButtonElement | null>(null);
+  // Closing is DELAYED: the panel is portalled away from the trigger, so the
+  // pointer leaves the trigger before it can land on the panel it is heading
+  // for. Any enter — trigger or panel — cancels the pending close.
+  const filesCloseTimer = useRef<number | undefined>(undefined);
+  const openFiles = useCallback(() => {
+    window.clearTimeout(filesCloseTimer.current);
+    setFilesOpen(true);
+  }, []);
+  const closeFiles = useCallback(() => {
+    window.clearTimeout(filesCloseTimer.current);
+    filesCloseTimer.current = window.setTimeout(() => setFilesOpen(false), 150);
+  }, []);
+  useEffect(() => () => window.clearTimeout(filesCloseTimer.current), []);
   const git = useLaneGitFacts(lane.id);
   const runtime = useLaneRuntime(lane.id, runtimeBump);
   const locks = useLaneLocks(lane.slot);
@@ -530,31 +681,42 @@ export default function LaneCard({
             sentence rather than a four-row block. The cwd is NOT here — the
             lane-detail header above this card already spells it out. */}
         {git?.available && (
-          <div
-            data-testid="lane-git"
-            className="mb-2 flex items-baseline gap-2 truncate font-mono text-[11px] text-fg-secondary"
-            title={git.subject}
-          >
-            <span className="shrink-0">⑂ {git.branch}</span>
-            <span className="shrink-0 text-fg-muted">{git.head}</span>
-            <span className="truncate text-fg-muted">{git.subject}</span>
-            {(git.dirty > 0 || git.untracked > 0) && (
-              <span
-                className="shrink-0 cursor-help text-status-warning/80"
-                /* Native title: the counts' own file list, capped server-side.
-                   A hover card would need a portal to escape this truncating
-                   row — the browser's tooltip already escapes it for free. */
-                title={
-                  git.files?.length
-                    ? git.files.join("\n") +
-                      (git.dirty + git.untracked > git.files.length
-                        ? `\n… +${git.dirty + git.untracked - git.files.length}`
-                        : "")
-                    : undefined
-                }
-              >
-                {t("git.uncommitted", { dirty: git.dirty, untracked: git.untracked })}
-              </span>
+          <div className="mb-2">
+            <div
+              data-testid="lane-git"
+              className="flex items-baseline gap-2 truncate font-mono text-[11px] text-fg-secondary"
+              title={git.subject}
+            >
+              <span className="shrink-0">⑂ {git.branch}</span>
+              <span className="shrink-0 text-fg-muted">{git.head}</span>
+              <span className="truncate text-fg-muted">{git.subject}</span>
+              {(git.dirty > 0 || git.untracked > 0) && (
+                <button
+                  type="button"
+                  ref={setCountsAnchor}
+                  data-testid="lane-git-counts"
+                  aria-expanded={filesOpen}
+                  onMouseEnter={openFiles}
+                  onMouseLeave={closeFiles}
+                  // Focus and click open it too: hover is not a gesture a
+                  // keyboard or a touchscreen has.
+                  onFocus={openFiles}
+                  onBlur={closeFiles}
+                  onClick={() => setFilesOpen((v) => !v)}
+                  className="shrink-0 cursor-help text-status-warning/80 underline decoration-dotted underline-offset-2"
+                >
+                  {t("git.uncommitted", { dirty: git.dirty, untracked: git.untracked })}
+                </button>
+              )}
+            </div>
+            {filesOpen && git.files?.length > 0 && (
+              <LaneGitFilesPanel
+                files={git.files}
+                hidden={git.dirty + git.untracked - git.files.length}
+                anchor={countsAnchor}
+                onPointerEnter={openFiles}
+                onPointerLeave={closeFiles}
+              />
             )}
           </div>
         )}

client/src/components/lanes/LaneStripCard.tsx

@@ -7,9 +7,15 @@
  * absent: the detail panel's pipeline map below shows the same thing with the
  * stage names attached. Keeping the tile small and fixed-width is what lets
  * many lanes stay scannable in one scrolling row.
+ *
+ * The tile is also the strip's reorder handle: native HTML5 drag-and-drop, no
+ * dependency. Ceiling: desktop pointers only — there is no touch drag and no
+ * auto-scroll when the strip overflows, so Alt+Arrow moves the focused tile as
+ * the keyboard (and touch-free) path.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
+import { useState } from "react";
 import { useTranslation } from "react-i18next";
 import type { Lane } from "../../lib/types";
 
@@ -45,33 +51,69 @@ function detectionLeads(lane: Lane): boolean {
 
 export default function LaneStripCard({
   lane,
+  index,
   selected,
   onSelect,
+  onReorder,
 }: {
   lane: Lane;
+  /** Position in the lane array — the unit both reorder paths speak in. */
+  index: number;
   selected: boolean;
   onSelect: () => void;
+  onReorder: (from: number, to: number) => void;
 }) {
   const { t } = useTranslation(["lanes"]);
+  const [dropTarget, setDropTarget] = useState(false);
 
   return (
     <button
       type="button"
       data-testid={`lane-tile-${lane.id}`}
       data-selected={selected ? "true" : undefined}
+      data-drop-target={dropTarget ? "true" : undefined}
       aria-pressed={selected}
       onClick={onSelect}
-      title={lane.cwd}
-      className={`w-56 shrink-0 rounded-lg border p-3 text-left shadow-sm transition-colors ${
-        selected
-          ? "border-accent bg-accent/10"
-          : "border-border bg-surface-2 hover:border-border-light hover:bg-surface-3"
+      draggable
+      onDragStart={(e) => {
+        // Firefox starts no drag at all without a setData call.
+        e.dataTransfer.setData("text/plain", String(index));
+        e.dataTransfer.effectAllowed = "move";
+      }}
+      onDragOver={(e) => {
+        e.preventDefault();
+        e.dataTransfer.dropEffect = "move";
+        setDropTarget(true);
+      }}
+      onDragLeave={() => setDropTarget(false)}
+      onDragEnd={() => setDropTarget(false)}
+      onDrop={(e) => {
+        e.preventDefault();
+        setDropTarget(false);
+        const from = Number(e.dataTransfer.getData("text/plain"));
+        if (Number.isInteger(from)) onReorder(from, index);
+      }}
+      onKeyDown={(e) => {
+        if (!e.altKey || (e.key !== "ArrowLeft" && e.key !== "ArrowRight")) return;
+        e.preventDefault();
+        onReorder(index, index + (e.key === "ArrowLeft" ? -1 : 1));
+      }}
+      title={`${lane.cwd}\n${t("reorderHint")}`}
+      className={`w-56 shrink-0 cursor-grab rounded-lg border p-3 text-left shadow-sm transition-colors active:cursor-grabbing ${
+        dropTarget
+          ? "border-accent bg-accent/20"
+          : selected
+            ? "border-accent bg-accent/10"
+            : "border-border bg-surface-2 hover:border-border-light hover:bg-surface-3"
       }`}
     >
       <div className="mb-1.5 flex items-center gap-1.5 text-[11px]">
         <span className={`h-2 w-2 shrink-0 rounded-full ${LIVENESS_DOT[lane.liveness]}`} />
-        <span className="shrink-0 text-[10px] font-semibold uppercase tracking-widest text-fg-muted">
-          {t("cardId", { id: lane.id })}
+        {/* The bare id, not "Lane 23": the word cost a third of the row's
+            width and said nothing, but the number itself is how the CLI
+            addresses a lane (`agenthub stage --lane 23`), so it stays. */}
+        <span className="shrink-0 text-[10px] font-semibold tracking-widest text-fg-muted">
+          #{lane.id}
         </span>
         <span className="truncate rounded bg-surface-4 px-1.5 py-0.5 text-fg-secondary">
           {lane.stage}

client/src/components/lanes/__tests__/LaneCard.test.tsx

@@ -9,7 +9,7 @@
  */
 
 import { describe, it, expect, vi, beforeEach } from "vitest";
-import { render, screen, waitFor } from "@testing-library/react";
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import LaneCard, { LaneToolsMenu, LaneRouterRow } from "../LaneCard";
 import type { Lane, LaneRuntime } from "../../../lib/types";
@@ -207,7 +207,11 @@ describe("LaneCard git block", () => {
     subject: "free-text rule mode in the form",
     dirty: 2,
     untracked: 1,
-    files: [" M server/lib/alerts.js", " M client/src/lib/api.ts", "?? scratch.txt"],
+    files: [
+      { path: "server/lib/alerts.js", status: " M", added: 12, deleted: 3 },
+      { path: "client/src/lib/api.ts", status: "M ", added: 1, deleted: 0 },
+      { path: "scratch.txt", status: "??", added: null, deleted: null },
+    ],
   };
 
   it("renders the live branch, head, subject and uncommitted counts", async () => {
@@ -219,14 +223,61 @@ describe("LaneCard git block", () => {
     expect(block.textContent).toContain("9b3e74a");
     expect(block.textContent).toContain("free-text rule mode in the form");
     expect(block.textContent).toContain("2");
-    // Hovering the counts names the files behind them.
-    expect(screen.getByText(/modified/).title).toBe(
-      " M server/lib/alerts.js\n M client/src/lib/api.ts\n?? scratch.txt"
-    );
     // The live branch replaces the lane's recorded one rather than doubling it.
     expect(screen.queryByText(/stale\/recorded/)).toBeNull();
   });
 
+  it("names the files behind the counts on hover, with each one's line delta", async () => {
+    vi.mocked(api.lanes.git).mockResolvedValueOnce(facts);
+    render(<LaneCard lane={makeLane()} onAction={vi.fn()} />);
+
+    const counts = await screen.findByTestId("lane-git-counts");
+    // Hidden until asked for: the row is a one-line summary until you hover.
+    expect(screen.queryByTestId("lane-git-files")).toBeNull();
+
+    fireEvent.mouseEnter(counts);
+    const panel = screen.getByTestId("lane-git-files");
+    expect(panel.textContent).toContain("alerts.js");
+    expect(panel.textContent).toContain("+12");
+    expect(panel.textContent).toContain("−3");
+    // Totals across the listed files.
+    expect(panel.textContent).toContain("+13");
+    // An untracked file has no delta to report and says so rather than "+0".
+    expect(panel.textContent).toContain("new");
+    expect(panel.textContent).toContain("3 files changed");
+
+    // Closing is delayed so the pointer can travel into the panel and scroll
+    // it — the panel is portalled to the body, away from its trigger.
+    fireEvent.mouseLeave(counts);
+    expect(screen.queryByTestId("lane-git-files")).not.toBeNull();
+    await waitFor(() => expect(screen.queryByTestId("lane-git-files")).toBeNull());
+  });
+
+  it("stays open while the pointer is inside the panel", async () => {
+    vi.mocked(api.lanes.git).mockResolvedValueOnce(facts);
+    render(<LaneCard lane={makeLane()} onAction={vi.fn()} />);
+
+    const counts = await screen.findByTestId("lane-git-counts");
+    fireEvent.mouseEnter(counts);
+    fireEvent.mouseLeave(counts);
+    // The pointer landed on the panel before the pending close fired.
+    fireEvent.mouseEnter(screen.getByTestId("lane-git-files"));
+    await new Promise((r) => setTimeout(r, 200));
+    expect(screen.queryByTestId("lane-git-files")).not.toBeNull();
+
+    fireEvent.mouseLeave(screen.getByTestId("lane-git-files"));
+    await waitFor(() => expect(screen.queryByTestId("lane-git-files")).toBeNull());
+  });
+
+  it("says how many files the server-side cap left out", async () => {
+    // 40 uncommitted files, 3 listed: the counts are exact, the listing is not.
+    vi.mocked(api.lanes.git).mockResolvedValueOnce({ ...facts, dirty: 39, untracked: 1 });
+    render(<LaneCard lane={makeLane()} onAction={vi.fn()} />);
+
+    fireEvent.mouseEnter(await screen.findByTestId("lane-git-counts"));
+    expect(screen.getByTestId("lane-git-files").textContent).toContain("37 more");
+  });
+
   it("omits the uncommitted line when the tree is clean", async () => {
     vi.mocked(api.lanes.git).mockResolvedValueOnce({ ...facts, dirty: 0, untracked: 0 });
     render(<LaneCard lane={makeLane()} onAction={vi.fn()} />);

client/src/components/lanes/__tests__/LaneStripCard.test.tsx

@@ -1,13 +1,13 @@
 /**
- * @file Rendering tests for the Workspace lane tile, focused on the amber
- * "detected" badge: it may only appear when the inferred stage is genuinely
- * AHEAD of the declared one, including when the declaration used a node alias
- * (which is most of what the ship-feature skill declares).
+ * @file Rendering tests for the Workspace lane tile: the amber "detected"
+ * badge (it may only appear when the inferred stage is genuinely AHEAD of the
+ * declared one, including when the declaration used a node alias — which is
+ * most of what the ship-feature skill declares), and the reorder handles.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
-import { describe, it, expect } from "vitest";
-import { render, screen } from "@testing-library/react";
+import { describe, it, expect, vi } from "vitest";
+import { render, screen, fireEvent } from "@testing-library/react";
 import LaneStripCard from "../LaneStripCard";
 import type { Lane, LaneNode } from "../../../lib/types";
 
@@ -63,8 +63,10 @@ describe("LaneStripCard detected badge", () => {
     render(
       <LaneStripCard
         lane={lane({ detected_stage: "review" })}
+        index={0}
         selected={false}
         onSelect={() => {}}
+        onReorder={() => {}}
       />
     );
     expect(screen.getByTestId("lane-tile-auto-1")).toHaveTextContent("review");
@@ -77,8 +79,10 @@ describe("LaneStripCard detected badge", () => {
     render(
       <LaneStripCard
         lane={lane({ stage: "tests", detected_stage: "implementing" })}
+        index={0}
         selected={false}
         onSelect={() => {}}
+        onReorder={() => {}}
       />
     );
     expect(screen.queryByTestId("lane-tile-auto-1")).toBeNull();
@@ -88,10 +92,104 @@ describe("LaneStripCard detected badge", () => {
     render(
       <LaneStripCard
         lane={lane({ stage: "tests", detected_stage: "review" })}
+        index={0}
         selected={false}
         onSelect={() => {}}
+        onReorder={() => {}}
       />
     );
     expect(screen.getByTestId("lane-tile-auto-1")).toHaveTextContent("review");
   });
 });
+
+describe("LaneStripCard reorder", () => {
+  /** jsdom ships no DataTransfer, so the drag events carry a stub store. */
+  function dataTransfer(initial = "") {
+    let payload = initial;
+    return {
+      setData: (_type: string, v: string) => {
+        payload = v;
+      },
+      getData: () => payload,
+      effectAllowed: "",
+      dropEffect: "",
+    };
+  }
+
+  it("reports the dragged tile's index and the drop target's", () => {
+    const onReorder = vi.fn();
+    const dt = dataTransfer();
+    render(
+      <>
+        <LaneStripCard
+          lane={lane({ id: 1 })}
+          index={0}
+          selected={false}
+          onSelect={() => {}}
+          onReorder={onReorder}
+        />
+        <LaneStripCard
+          lane={lane({ id: 2 })}
+          index={2}
+          selected={false}
+          onSelect={() => {}}
+          onReorder={onReorder}
+        />
+      </>
+    );
+    fireEvent.dragStart(screen.getByTestId("lane-tile-1"), { dataTransfer: dt });
+    fireEvent.drop(screen.getByTestId("lane-tile-2"), { dataTransfer: dt });
+    expect(onReorder).toHaveBeenCalledWith(0, 2);
+  });
+
+  it("ignores a drop carrying no tile index", () => {
+    const onReorder = vi.fn();
+    render(
+      <LaneStripCard
+        lane={lane({})}
+        index={0}
+        selected={false}
+        onSelect={() => {}}
+        onReorder={onReorder}
+      />
+    );
+    fireEvent.drop(screen.getByTestId("lane-tile-1"), { dataTransfer: dataTransfer("nonsense") });
+    expect(onReorder).not.toHaveBeenCalled();
+  });
+
+  it("moves the focused tile with Alt+Arrow, the keyboard path for reordering", () => {
+    const onReorder = vi.fn();
+    render(
+      <LaneStripCard
+        lane={lane({})}
+        index={2}
+        selected={false}
+        onSelect={() => {}}
+        onReorder={onReorder}
+      />
+    );
+    const tile = screen.getByTestId("lane-tile-1");
+    fireEvent.keyDown(tile, { key: "ArrowLeft", altKey: true });
+    expect(onReorder).toHaveBeenCalledWith(2, 1);
+    fireEvent.keyDown(tile, { key: "ArrowRight", altKey: true });
+    expect(onReorder).toHaveBeenCalledWith(2, 3);
+    // A bare arrow is the strip's own scroll/focus movement, not a reorder.
+    fireEvent.keyDown(tile, { key: "ArrowLeft" });
+    expect(onReorder).toHaveBeenCalledTimes(2);
+  });
+
+  it("shows the id without the 'Lane' prefix", () => {
+    render(
+      <LaneStripCard
+        lane={lane({ id: 7, title: "checkout flow" })}
+        index={0}
+        selected={false}
+        onSelect={() => {}}
+        onReorder={() => {}}
+      />
+    );
+    const tile = screen.getByTestId("lane-tile-7");
+    expect(tile).toHaveTextContent("#7");
+    expect(tile.textContent).not.toMatch(/Lane/i);
+  });
+});