fix(lanes): don't auto-close Add Lane modal after setup summary

The 3s auto-close timer closed before a user reasonably had time to
look at the setup results, making the feature appear to do nothing.
Require an explicit dismiss (Cancel/X) instead.

client/src/components/lanes/AddLaneModal.tsx

@@ -58,25 +58,6 @@ export function AddLaneModal({
     setSetupResult(null);
   };
 
-  // The setup summary (below) is shown for a few seconds before the modal
-  // auto-closes, so the user actually sees whether profile/agents/mcp
-  // succeeded instead of the modal vanishing the instant the lane exists.
-  const closeTimerRef = useRef<number | null>(null);
-  const finishAndClose = useCallback(() => {
-    if (closeTimerRef.current !== null) {
-      window.clearTimeout(closeTimerRef.current);
-      closeTimerRef.current = null;
-    }
-    reset();
-    onClose();
-  }, [onClose]);
-  useEffect(
-    () => () => {
-      if (closeTimerRef.current !== null) window.clearTimeout(closeTimerRef.current);
-    },
-    []
-  );
-
   // Look up the repo's branches once the path settles - debounced so every
   // keystroke while typing a path doesn't fire a request against a path that
   // isn't finished yet.
@@ -147,9 +128,11 @@ export function AddLaneModal({
         });
       }
 
+      // Leave the modal open so the setup summary below stays on screen; the
+      // user dismisses it themselves (Cancel/X) once they've seen it, rather
+      // than racing a timer that can close before they've looked at it.
       setBusy(false);
       onAdded(result.lane);
-      closeTimerRef.current = window.setTimeout(finishAndClose, 3000);
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err));
       setBusy(false);
@@ -163,8 +146,9 @@ export function AddLaneModal({
   // into after the very first character. useCallback keeps the identity stable
   // across renders so only mount/unmount (and a real onClose change) refocuses.
   const handleCancel = useCallback(() => {
-    finishAndClose();
-  }, [finishAndClose]);
+    reset();
+    onClose();
+  }, [onClose]);
 
   return (
     <ConfirmModal

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

@@ -158,8 +158,9 @@ describe("AddLaneModal", () => {
     expect(onAdded).toHaveBeenCalledWith(
       expect.objectContaining({ id: 9, status: "provisioning" })
     );
-    // The setup summary stays on screen for a few seconds before auto-closing.
-    await waitFor(() => expect(onClose).toHaveBeenCalled(), { timeout: 4000 });
+    // The modal stays open showing the setup summary until dismissed - it
+    // does not close itself just because the lane was added.
+    expect(onClose).not.toHaveBeenCalled();
   });
 
   it("shows a server error and leaves the modal open instead of closing silently", async () => {
@@ -208,7 +209,7 @@ describe("AddLaneModal", () => {
     await waitFor(() => expect(onAdded).toHaveBeenCalled());
   });
 
-  it("still calls onAdded and closes even when every setup call fails", async () => {
+  it("still calls onAdded even when every setup call fails", async () => {
     vi.mocked(api.lanes.branches).mockResolvedValue({ branches: ["main"], current: "main" });
     vi.mocked(api.lanes.worktree).mockResolvedValue({
       lane: { id: 43, title: "demo2", cwd: "/lanes/demo2", status: "provisioning" } as Lane,
@@ -229,10 +230,10 @@ describe("AddLaneModal", () => {
     await user.click(screen.getByRole("button", { name: "Add lane" }));
 
     await waitFor(() => expect(onAdded).toHaveBeenCalled());
-    await waitFor(() => expect(onClose).toHaveBeenCalled(), { timeout: 4000 });
+    expect(onClose).not.toHaveBeenCalled();
   });
 
-  it("shows the setup summary and lets the user dismiss it early instead of waiting out the auto-close timer", async () => {
+  it("shows the setup summary and lets the user dismiss it manually", async () => {
     vi.mocked(api.lanes.branches).mockResolvedValue({ branches: ["main"], current: "main" });
     vi.mocked(api.lanes.worktree).mockResolvedValue({
       lane: { id: 44, title: "demo3", cwd: "/lanes/demo3", status: "provisioning" } as Lane,