refactor(public): retire track-cardinal stack, fold Archive/Cuts cards into ReleaseGallery (P11 W3 §4)

DeepDrftPublic.Client/Controls/ReleaseGallery.razor

@@ -1,9 +1,14 @@
 @namespace DeepDrftPublic.Client.Controls
 
-@* Card grid of releases that open their own detail page (/{DetailRoute}/{id}). Shared by the
-   Sessions and Mixes browse pages. Cuts intentionally do not use this — they open the track
-   gallery filtered by album, a different navigation target. Fully controlled by the parent:
-   loading and item state are passed in. *@
+@* The single release-card grid for every browse surface (Sessions, Mixes, Cuts, Archive). Cards
+   open a detail page; how a card computes its href is the only real divergence across surfaces, so
+   the parent supplies it one of two ways:
+     - DetailRoute (the simple default): every card links /{DetailRoute}/{id} (Sessions, Mixes).
+     - HrefResolver (per-card): each card links HrefResolver(release), so Archive routes each card by
+       its own medium through the one ReleaseRoutes table, and Cuts routes to /cuts/{id}.
+   HrefResolver wins when both are supplied. The card subtitle defaults to the artist; SubtitleResolver
+   overrides it (Cuts shows a track count instead). Fully controlled by the parent: loading and item
+   state are passed in. *@
 
 <div>
     <MudContainer MaxWidth="MaxWidth.Large" Class="release-gallery-container">
@@ -33,7 +38,7 @@
                 {
                     <MudItem xs="12" sm="6" md="4" lg="3" xl="3">
                         <div class="release-card-center">
-                            <a href="@($"/{DetailRoute}/{release.Id}")" class="release-card-link">
+                            <a href="@CardHref(release)" class="release-card-link">
                                 <div class="release-card">
                                     @if (!string.IsNullOrEmpty(release.ImagePath))
                                     {
@@ -51,7 +56,7 @@
                                             @release.Title
                                         </MudText>
                                         <MudText Typo="Typo.caption" Class="release-card-artist text-truncate">
-                                            @release.Artist
+                                            @(SubtitleResolver?.Invoke(release) ?? release.Artist)
                                         </MudText>
                                     </div>
                                 </div>
@@ -68,8 +73,27 @@
     [Parameter] public required IReadOnlyList<DeepDrftModels.DTOs.ReleaseDto> Releases { get; set; }
     [Parameter] public bool Loading { get; set; }
 
-    /// <summary>Route segment for a card's detail page; a card links to /{DetailRoute}/{id}.</summary>
-    [Parameter] public required string DetailRoute { get; set; }
+    /// <summary>
+    /// Route segment for a card's detail page; a card links to /{DetailRoute}/{id}. The simple
+    /// fixed-route default used by Sessions/Mixes. Ignored when <see cref="HrefResolver"/> is supplied.
+    /// </summary>
+    [Parameter] public string? DetailRoute { get; set; }
+
+    /// <summary>
+    /// Per-card href resolver. When supplied, a card links to its result instead of the
+    /// <see cref="DetailRoute"/>-based href, letting Archive route each card by its own medium and
+    /// Cuts route to /cuts/{id} (both via <c>ReleaseRoutes.DetailHref</c>).
+    /// </summary>
+    [Parameter] public Func<DeepDrftModels.DTOs.ReleaseDto, string>? HrefResolver { get; set; }
+
+    /// <summary>
+    /// Optional override for a card's subtitle line (defaults to the release artist). Cuts pass a
+    /// track-count label here.
+    /// </summary>
+    [Parameter] public Func<DeepDrftModels.DTOs.ReleaseDto, string>? SubtitleResolver { get; set; }
 
     [Parameter] public string EmptyMessage { get; set; } = "Nothing here yet";
+
+    private string CardHref(DeepDrftModels.DTOs.ReleaseDto release)
+        => HrefResolver?.Invoke(release) ?? $"/{DetailRoute}/{release.Id}";
 }