test(e2e): the Files sort round trip starts from a known sort and puts the account's back

A header press cycles the sort (asc, desc, none), so the case depended on what an earlier run left
in the account: the third run in a row pressed it to none.

frontend/e2e/bookmark.spec.ts

@@ -147,8 +147,8 @@ test.describe("a bookmark reopens the view it was taken of", () => {
     await fresh.context().close();
   });
 
-  // A file of the test's own, uploaded for it and deleted after: the account's library is left as
-  // it was found.
+  // A file of the test's own, uploaded for it and deleted after, and the account's sort put back:
+  // the account is left as it was found.
   test(
     "the Files sort, and the file open in the viewer",
     { tag: "@files" },
@@ -168,8 +168,14 @@ test.describe("a bookmark reopens the view it was taken of", () => {
       });
       expect(up.ok(), await up.text()).toBeTruthy();
       const { id } = (await up.json()) as { id: number };
+      // The account's own sort, put back after: a header press cycles it (asc, desc, none), so the
+      // case starts from none, as the address names it, whatever an earlier run left.
+      const me = (await (await page.request.get("/api/me")).json()) as {
+        preferences?: Record<string, unknown>;
+      };
+      const ownSort = me.preferences?.filesSort ?? null;
       try {
-        await gotoPage(page, "files");
+        await openApp(page, "/?page=files&fsort=none");
         await column(page, "Name").getByRole("button").first().click();
         await expect(page).toHaveURL(/[?&]fsort=name/);
         const sorted = await column(page, "Name").getAttribute("aria-sort");
@@ -182,6 +188,7 @@ test.describe("a bookmark reopens the view it was taken of", () => {
         await fresh.context().close();
       } finally {
         await page.request.delete(`/api/files/${id}`);
+        await page.request.put("/api/me/preferences", { data: { filesSort: ownSort } });
       }
     },
   );