@* Section header + divider pair — "Aktiven", "Passiven", "Einkünfte",
   "Ausgaben", "Einnahmen" etc. Wraps two <tr>s so the caller drops it
   into <tbody> as a single element. *@

<tr>
    <td colspan="@Colspan" class="header">@Title</td>
</tr>
<tr>
    <td colspan="@Colspan"><hr/></td>
</tr>

@code {
    [Parameter, EditorRequired]
    public string Title { get; set; } = "";

    [Parameter, EditorRequired]
    public int Colspan { get; set; }
}