feat(cms): bring per-medium tab grids to ALL-tab parity (§8.C)

Render the rich CmsAlbumBrowser filtered per medium in the CUTS/SESSIONS/MIXES
tabs via an optional RowActions slot; retire the thin CmsMediumTable. Session
hero and Mix waveform actions preserved; ALL tab and TrackList unchanged.

DeepDrftManager/Components/Pages/Tracks/CmsAlbumBrowser.razor

@@ -65,6 +65,10 @@ else
             </MudTd>
             <MudTd DataLabel="Tracks">@context.TrackCount</MudTd>
             <MudTd DataLabel="Actions">
+                @* Medium-specific row action (Session hero, Mix waveform) when a host supplies one;
+                   the ALL tab supplies none. Rendered before the shared edit/delete so the medium
+                   affordance reads left-to-right ahead of the universal actions. *@
+                @RowActions?.Invoke(context.Release)
                 <MudTooltip Text="Batch Edit">
                     <MudIconButton Icon="@Icons.Material.Filled.Edit"
                                    Size="Size.Small"
@@ -122,6 +126,13 @@ else
     [Parameter] public bool IsLoading { get; set; }
     [Parameter] public EventCallback OnReleasesChanged { get; set; }
 
+    // Optional per-row, medium-specific action slot (Session hero upload, Mix waveform generate),
+    // rendered in the Actions cell ahead of the shared edit/delete buttons. The ALL tab leaves it
+    // unset and renders the grid exactly as before. A per-medium host (CmsCut/Session/MixBrowser)
+    // supplies it so the rich grid filtered to one medium keeps that medium's bespoke affordance —
+    // the rich expand/delete/Type-chip/edit logic stays here, single-sourced, rather than forked.
+    [Parameter] public RenderFragment<ReleaseDto>? RowActions { get; set; }
+
     private List<AlbumRow> _rows = new();
 
     // Tracks the Releases reference last projected into _rows. Guards against OnParametersSet