Banner that stays dismissed

@inject NavigationManager Navigation

<Stack Gap="0" Grow>
    @* Closed once, it stays closed for a year on every page, until the key changes. *@
    <Banner @key="Key" Status="Status.Warning" Dismissible Remember="DismissMemory.Persistent" RememberKey="@Key">
        Scheduled maintenance on Sunday from 02:00 to 04:00 UTC. Exports pause during the window.
        <BannerActions><Anchor Href="https://status.example.com" External>Status page</Anchor></BannerActions>
    </Banner>
    <Stack Gap="5" Padding="6">
        <Row Gap="1" Wrap>
            @foreach (var tab in Pages)
            {
                <Button Href="@Navigation.GetUriWithQueryParameter("page", tab.Id)" Size="ControlSize.Sm" Accent="Accent.Neutral"
                        Variant="@(tab.Id == Current.Id ? ButtonVariant.Soft : ButtonVariant.Ghost)"
                        aria-current="@(tab.Id == Current.Id ? "page" : null)">@tab.Title</Button>
            }
        </Row>
        <Stack Gap="2">
            <Heading Level="2" Size="TextSize.Xl">@Current.Title</Heading>
            <TextBlock Color="Color.Muted">@Current.Text</TextBlock>
        </Stack>
        <Divider />
        <TextBlock Size="TextSize.Sm" Color="Color.Muted">
            Notice <Code>@Key</Code> ·
            <Anchor Href="@Navigation.GetUriWithQueryParameter("notice", Notice + 1)">Post a new notice</Anchor>
        </TextBlock>
    </Stack>
</Stack>

@code {
    [SupplyParameterFromQuery(Name = "page")]
    private string? PageId { get; set; }

    [SupplyParameterFromQuery(Name = "notice")]
    private int? NoticeQuery { get; set; }

    private int Notice => NoticeQuery ?? 1;

    // The cookie is ib-banner-{key}: a new key shows the banner to everyone again.
    private string Key => $"maintenance-2026-11-v{Notice}";

    private AppPage Current => Pages.FirstOrDefault(p => p.Id == PageId) ?? Pages[0];

}