fix(ui): сохранить имя строки при прокрутке таблицы

tests/e2e/large-statistics-pivot.spec.ts

@@ -36,6 +36,9 @@ for (const width of [1440, 320]) test("Pivot51×16: границы, сортир
   expect(await scroll.evaluate(el => el.scrollWidth > el.clientWidth)).toBe(true)
   await scroll.evaluate(el => { el.scrollLeft = el.scrollWidth })
   await expect.poll(() => scroll.evaluate(el => el.scrollLeft)).toBeGreaterThan(0)
+  const pinned = rendered.first().getByRole("cell").first()
+  expect(await pinned.evaluate(el => { const cell = el.getBoundingClientRect(), viewport = el.closest('[data-slot="scroll-area-viewport"]')!.getBoundingClientRect(); return cell.left >= viewport.left - 1 && cell.right <= viewport.right + 1 })).toBe(true)
+  expect(await rendered.first().getByRole("cell").last().evaluate(el => { const total = el.getBoundingClientRect(), viewport = el.closest('[data-slot="scroll-area-viewport"]')!.getBoundingClientRect(), pinned = el.closest("tr")!.querySelector("td")!.getBoundingClientRect(); return total.left >= pinned.right - 1 && total.right <= viewport.right + 1 })).toBe(true)
   expect(await page.evaluate(() => document.documentElement.scrollWidth <= innerWidth)).toBe(true)
   await expect(rendered.first().getByRole("button")).toHaveCount(0)
   await expect(rendered.nth(1).getByRole("cell").nth(16).getByRole("button")).toHaveCount(0)
@@ -46,7 +49,9 @@ for (const width of [1440, 320]) test("Pivot51×16: границы, сортир
   mkdirSync("docs/ux-ui/screens", { recursive: true })
   await page.screenshot({ path: "docs/ux-ui/screens/wide-statistics-pivot-" + width + ".png", animations: "disabled" })
   const lastCell = rendered.nth(1).getByRole("cell").nth(15).getByRole("button")
-  await lastCell.focus(); await page.keyboard.press("Enter")
+  await lastCell.focus()
+  expect(await lastCell.evaluate(el => { const value = el.getBoundingClientRect(), viewport = el.closest('[data-slot="scroll-area-viewport"]')!.getBoundingClientRect(), pinned = el.closest("tr")!.querySelector("td")!.getBoundingClientRect(); return value.left >= pinned.right - 1 && value.right <= viewport.right + 1 })).toBe(true)
+  await page.keyboard.press("Enter")
   await expect(page).toHaveURL(/view=explore/)
   const selected = new URL(page.url()); expect(selected.searchParams.get("userId")).toBe("50"); expect(selected.searchParams.get("service")).toBe("service-15")
   expect(reads.some(url => url.pathname === "/api/statistics" && url.searchParams.get("userId") === "50" && url.searchParams.get("service") === "service-15")).toBe(true)