test(completion-docs): keep the dialog closed when dismissed mid-save

Dismissing the edit dialog with Escape or the Close button while an update
is still in flight must not bring it back when the save lands. The per-call
mutate callbacks that reopen it in view mode are dropped by TanStack Query
once the dialog unmounts, so this pins that behaviour: the test fails if the
save is moved to mutateAsync().then(), which would reopen the dialog.

src/test/app/(protected)/completion-docs/completion-template-dialog.test.tsx

@@ -234,6 +234,39 @@ describe("Edit template", { timeout: 15_000 }, () => {
       await within(dialog).findByText("Created by Jane Doe · Updated Sep 25, 2026"),
     ).toBeInTheDocument();
   });
+
+  it.each([
+    [
+      "Escape",
+      async () => {
+        // The disabled Save button drops focus; Escape is pressed from inside the form.
+        screen.getByRole("textbox", { name: /Document Title/ }).focus();
+        await user.keyboard("{Escape}");
+      },
+    ],
+    ["the Close button", () => user.click(screen.getByRole("button", { name: "Close" }))],
+  ])("stays closed when dismissed with %s while a save is in flight", async (_, dismiss) => {
+    let finishSave: () => void = () => {};
+    const respond = api.apiPut.getMockImplementation()!;
+    api.apiPut.mockImplementation(
+      (...args: unknown[]) =>
+        new Promise((resolve) => {
+          finishSave = () => resolve(respond(...args));
+        }),
+    );
+    const dialog = await openTemplate("Backflow Test Report");
+    await user.click(within(dialog).getByRole("button", { name: /Edit/ }));
+    await user.type(within(dialog).getByRole("textbox", { name: /Document Title/ }), " v2");
+    await user.click(within(dialog).getByRole("button", { name: /Save changes/ }));
+    await waitFor(() => expect(api.apiPut).toHaveBeenCalled());
+
+    await dismiss();
+    await waitFor(() => expect(screen.queryByRole("dialog")).not.toBeInTheDocument());
+    finishSave();
+
+    await waitFor(() => expect(toast.success).toHaveBeenCalledWith("Template updated"));
+    expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
+  });
 });
 
 describe("Delete template", { timeout: 15_000 }, () => {