saveFieldIconSettings function

async function saveFieldIconSettings(): Promise<void> {
  const settings: Partial<Settings> = {
    showFieldIcon: (
      document.getElementById("setting-show-field-icon") as HTMLInputElement
    ).checked,
    fieldIconPosition: (
      document.getElementById(
        "setting-field-icon-position",
      ) as HTMLSelectElement
    ).value as Settings["fieldIconPosition"],
  };
  await chrome.runtime.sendMessage({
    type: "SAVE_SETTINGS",
    payload: settings,
  });
  showToast(t("savedAuto"));
}