Editor testing — `MockNotification`

Namespace: AlmediaLink.Editor.Testing · readonly struct Public test-facing notification shape. Field-named (vs. positional tuple) so calls stay readable as the protocol evolves.

public readonly struct MockNotification
{
    public readonly string Id;
    public readonly string Title;
    public readonly string Message;
    public readonly string Display;
    public readonly string Timestamp;
    public readonly string IconUrl;

    [Obsolete] public string Type { get; }   // alias of Display

    public MockNotification(string id, string title, string message, string display,
        string timestamp = null, string iconUrl = null);
}

display models the wire presentation hint ("popup" or "tray"; native never forwards anything else). A null timestamp defaults to DateTime.UtcNow.ToString("o") (ISO-8601), matching the format the backend emits. A null iconUrl models the omitted wire key and surfaces as AlmediaNotification.IconUrl == null.