fix(ui): защитить экспорт WireGuard от устаревших ответов

tests/e2e/wireguard-links.spec.ts

@@ -351,3 +351,67 @@ test("WireGuard: переключение ждёт подтверждения и
   await expect(page.getByRole("alert").filter({ hasText: "Сервер не подтвердил" })).toHaveCount(0)
   expect(attempts).toBe(3)
 })
+
+for (const oldFails of [false, true]) {
+  test("WireGuard: поздний экспорт не меняет новую панель " + oldFails, async ({ page }) => {
+    await setup(page, "/wireguard")
+    let release: (() => void) | undefined
+    const gate = new Promise<void>(resolve => { release = resolve })
+    let requests = 0
+    await page.route("**/api/wireguard/export", async route => {
+      requests++
+      const body = route.request().postDataJSON()
+      expect(body.format).toBe("rsc")
+      if (body.serverId === "1") {
+        await gate
+        return oldFails ? route.fulfill({ status: 500, json: { error: "Старая ошибка экспорта" } }) : route.fulfill({ json: { format: "rsc", filename: "old.rsc", content: "OLD_EXPORT" } })
+      }
+      expect(body.serverId).toBe("2")
+      return route.fulfill({ json: { format: "rsc", filename: "new.rsc", content: "NEW_EXPORT" } })
+    })
+    const open = async (index: number) => {
+      await page.getByRole("button", { name: "Действия: wg-same" }).nth(index).click()
+      await page.getByRole("menuitem", { name: "Экспорт", exact: true }).click()
+    }
+    await expect(page.locator("tr[data-row-id]")).toHaveCount(4)
+    await open(0)
+    const dialog = page.getByRole("dialog", { name: "Экспорт WireGuard" })
+    await dialog.getByRole("button", { name: "Подтянуть конфиг с роутера с private-key", exact: true }).evaluate(button => { (button as HTMLButtonElement).click(); (button as HTMLButtonElement).click() })
+    await expect.poll(() => requests).toBe(1)
+    await expect(dialog.getByRole("button", { name: "Подтянуть конфиг с роутера с private-key", exact: true })).toBeDisabled()
+    await page.keyboard.press("Escape")
+    await expect(dialog).toHaveCount(0)
+    await open(2)
+    await expect(dialog).toContainText("Второй сервер")
+    await dialog.getByRole("button", { name: "Подтянуть конфиг с роутера с private-key", exact: true }).click()
+    await expect(dialog.locator("pre")).toContainText("NEW_EXPORT")
+    const oldResponse = page.waitForResponse(response => response.url().endsWith("/api/wireguard/export") && response.request().postDataJSON().serverId === "1")
+    release!()
+    await (await oldResponse).finished()
+    await page.waitForTimeout(150)
+    await expect(dialog.locator("pre")).toContainText("NEW_EXPORT")
+    await expect(page.getByText("Старая ошибка экспорта", { exact: true })).toHaveCount(0)
+    expect(requests).toBe(2)
+  })
+}
+
+test("WireGuard: экспорт отклоняет повреждённый ответ и другой формат", async ({ page }) => {
+  await setup(page, "/wireguard?server=1&interface=*%2F2")
+  let attempts = 0
+  await page.route("**/api/wireguard/export", route => {
+    attempts++
+    return route.fulfill({ json: attempts === 1 ? {} : attempts === 2 ? { format: "conf", filename: "wrong.conf", content: "WRONG_FORMAT" } : { format: "rsc", filename: "valid.rsc", content: "VALID_EXPORT" } })
+  })
+  await page.getByRole("button", { name: "Действия: wg-same" }).click()
+  await page.getByRole("menuitem", { name: "Экспорт", exact: true }).click()
+  const dialog = page.getByRole("dialog", { name: "Экспорт WireGuard" })
+  for (let i = 0; i < 2; i++) {
+    await dialog.getByRole("button", { name: "Подтянуть конфиг с роутера с private-key", exact: true }).click()
+    await expect.poll(() => attempts).toBe(i + 1)
+    await expect(page.getByText("Некорректный ответ экспорта WireGuard", { exact: true }).first()).toBeVisible()
+    await expect(dialog.getByRole("button", { name: "Подтянуть конфиг с роутера с private-key", exact: true })).toBeEnabled()
+    await expect(dialog.locator("pre")).not.toContainText("WRONG_FORMAT")
+  }
+  await dialog.getByRole("button", { name: "Подтянуть конфиг с роутера с private-key", exact: true }).click()
+  await expect(dialog.locator("pre")).toContainText("VALID_EXPORT")
+})