Merge p9-w8-8l-name-collapse into dev (8.L: collapse release/track name for single-track media)

DeepDrftManager/Components/Pages/Tracks/BatchEdit.razor

@@ -72,6 +72,7 @@
                 <MudPaper Class="pa-4" Elevation="2">
                     <BatchTrackDetail SelectedTrack="@(_selectedIndex >= 0 && _tracks.Count > 0 ? _tracks[_selectedIndex] : null)"
                                       Disabled="_saving"
+                                      ShowTrackName="@(!MediumRules.CardinalityOf(_medium).IsSingleTrack)"
                                       TrackNameChanged="@(name => { if (_selectedIndex >= 0) { _tracks[_selectedIndex].TrackName = name; } })" />
                 </MudPaper>
             </MudItem>
@@ -337,6 +338,14 @@
         var album = string.IsNullOrWhiteSpace(_albumName) ? null : _albumName;
         var genre = string.IsNullOrWhiteSpace(_genre) ? null : _genre;
 
+        // For single-track media (Session/Mix) the track name is derived from the Release Name —
+        // no separate Track Name editor is shown. Sync here so changes to the Release Name always
+        // carry through to the stored track name.
+        if (MediumRules.CardinalityOf(_medium).IsSingleTrack && _tracks.Count > 0)
+        {
+            _tracks[0].TrackName = _albumName;
+        }
+
         _imagePath = null; // Clear any stale uploaded path from a prior partial attempt.
         _saving = true;
         _processedCount = 0;

DeepDrftManager/Components/Pages/Tracks/BatchTrackDetail.razor

@@ -5,6 +5,8 @@
 else
 {
     <MudStack Spacing="4">
+        @if (ShowTrackName)
+        {
             <MudTextField Value="SelectedTrack.TrackName"
                           ValueChanged="@((string v) => TrackNameChanged.InvokeAsync(v))"
                           T="string"
@@ -13,6 +15,7 @@ else
                           RequiredError="Track Name is required"
                           Variant="Variant.Outlined"
                           Disabled="Disabled" />
+        }
 
         @if (SelectedTrack.Id.HasValue)
         {
@@ -46,6 +49,12 @@ else
     [Parameter] public BatchRowModel? SelectedTrack { get; set; }
     [Parameter] public bool Disabled { get; set; }
     [Parameter] public EventCallback<string> TrackNameChanged { get; set; }
+    /// <summary>
+    /// When false (single-track Session/Mix), the Track Name field is suppressed — the name is
+    /// derived from the Release Name by the parent form and never entered independently.
+    /// Defaults to true so the Cut multi-track path is unchanged.
+    /// </summary>
+    [Parameter] public bool ShowTrackName { get; set; } = true;
 
     private static string FormatBytes(long bytes)
     {

DeepDrftManager/Components/Pages/Tracks/BatchUpload.razor

@@ -59,10 +59,7 @@
                 <InputFile OnChange="HandleSingleWavSelected" accept=".wav,audio/wav,audio/x-wav" disabled="@_uploading" />
                 @if (_tracks.Count > 0)
                 {
-                    <MudTextField @bind-Value="_tracks[0].TrackName"
-                                  Label="Track Name"
-                                  Variant="Variant.Outlined"
-                                  Disabled="_uploading" />
+                    @* Track name is derived from the Release Name for Session/Mix — no separate input. *@
                     <MudText Typo="Typo.caption">Selected: @(_tracks[0].WavFile?.Name ?? "—")</MudText>
                 }
             </MudStack>
@@ -247,6 +244,13 @@
             return;
         }
 
+        // For single-track media (Session/Mix) the track name is derived from the Release Name —
+        // no separate Track Name input is shown. Sync here so the stored name always matches.
+        if (MediumRules.CardinalityOf(_medium).IsSingleTrack && _tracks.Count > 0)
+        {
+            _tracks[0].TrackName = _albumName;
+        }
+
         _imagePath = null; // Clear any stale uploaded path from a prior partial attempt.
         _uploading = true;
         _uploadedCount = 0;