fix(gre): сохранять и восстанавливать статические IPv6 адреса

tests/e2e/gre-form.spec.ts

@@ -13,7 +13,7 @@ for (const mode of ["create", "dto", "edit"]) {
     if (route.request().method() === (mode === "edit" ? "PATCH" : "POST")) {
       attempts++
       expect(path).toBe("/api/gre/tunnels")
-      expect(route.request().postDataJSON()).toMatchObject({ serverId: "1", name: "gre-test", remoteAddress: "192.0.2.9", remoteInnerIp, comment: "сохранённый ввод" })
+      expect(route.request().postDataJSON()).toMatchObject({ serverId: "1", name: "gre-test", remoteAddress: "192.0.2.9", remoteInnerIp, localInnerIp: mode === "edit" ? "" : "fd00:151::1/64", comment: "сохранённый ввод" })
       if (mode === "edit") expect(route.request().postDataJSON().rosId).toBe("*T/1")
       if (attempts === 1) { await gate; return route.fulfill({ status: 403, json: { error: "Запись запрещена тест" } }) }
       if (attempts === 2) return route.fulfill({ json: {} })
@@ -40,6 +40,7 @@ for (const mode of ["create", "dto", "edit"]) {
   await sheet.getByLabel("Удалённый адрес").fill("192.0.2.9")
   await sheet.getByLabel("Комментарий").fill("сохранённый ввод")
   await sheet.getByLabel("Удалённый IP", { exact: true }).fill(remoteInnerIp)
+  await sheet.getByLabel("Локальный IP", { exact: true }).fill(mode === "edit" ? "" : "fd00:151::1/64")
   const submit = sheet.getByRole("button", { name: mode === "edit" ? "Сохранить" : "Создать туннель", exact: true })
   await submit.evaluate(button => { (button as HTMLButtonElement).click(); (button as HTMLButtonElement).click() })
   await expect.poll(() => attempts).toBe(1)