fix: TrackDetail render mode, pause, and secondary text color

DeepDrftPublic.Client/Pages/TrackDetail.razor

@@ -1,5 +1,4 @@
 @page "/track/{EntryKey}"
-@rendermode InteractiveWebAssembly
 
 <PageTitle>@(ViewModel.Track?.TrackName ?? "Track") - DeepDrft</PageTitle>
 
@@ -24,7 +23,7 @@ else if (ViewModel.NotFound)
     <div class="deepdrft-track-detail-container">
         <div class="deepdrft-track-detail-masthead">
             <MudText Typo="Typo.h4" Align="Align.Center">Track not found.</MudText>
-            <MudText Typo="Typo.body2" Align="Align.Center" Class="mud-text-secondary">
+            <MudText Typo="Typo.body2" Align="Align.Center" Color="Color.Secondary">
                 This track may have been moved or removed.
             </MudText>
             <div class="d-flex justify-center mt-4">