feat: capture and display original upload filename for tracks

DeepDrftManager/Components/Pages/Tracks/TrackList.razor

@@ -47,6 +47,7 @@
                     <MudTh><MudTableSortLabel SortLabel="Genre" T="TrackDto">Genre</MudTableSortLabel></MudTh>
                     <MudTh><MudTableSortLabel SortLabel="ReleaseDate" T="TrackDto">Release Date</MudTableSortLabel></MudTh>
                     <MudTh>Entry Key</MudTh>
+                    <MudTh>File Name</MudTh>
                     <MudTh Style="width: 1%; white-space: nowrap;">Actions</MudTh>
                 </HeaderContent>
                 <RowTemplate>
@@ -56,6 +57,7 @@
                     <MudTd DataLabel="Genre">@(context.Genre ?? "—")</MudTd>
                     <MudTd DataLabel="Release Date">@(context.ReleaseDate?.ToString("yyyy-MM-dd") ?? "—")</MudTd>
                     <MudTd DataLabel="Entry Key"><MudText Typo="Typo.caption" Style="font-family: monospace;">@context.EntryKey</MudText></MudTd>
+                    <MudTd DataLabel="File Name"><MudText Typo="Typo.caption" Style="font-family: monospace;">@(context.OriginalFileName ?? "—")</MudText></MudTd>
                     <MudTd DataLabel="Actions">
                         <MudTooltip Text="Edit">
                             <MudIconButton Icon="@Icons.Material.Filled.Edit"

DeepDrftManager/Components/Pages/Tracks/TrackNew.razor

@@ -144,6 +144,7 @@
                 string.IsNullOrWhiteSpace(_album) ? null : _album,
                 string.IsNullOrWhiteSpace(_genre) ? null : _genre,
                 string.IsNullOrWhiteSpace(_releaseDate) ? null : _releaseDate,
+                _selectedFile.Name,
                 createdByUserId);
 
             if (result.Success)

DeepDrftManager/Services/CmsTrackService.cs

@@ -39,6 +39,7 @@ public class CmsTrackService : ICmsTrackService
         string? album,
         string? genre,
         string? releaseDate,
+        string? originalFileName,
         long createdByUserId,
         CancellationToken ct = default)
     {
@@ -54,6 +55,8 @@ public class CmsTrackService : ICmsTrackService
         if (!string.IsNullOrWhiteSpace(album)) multipart.Add(new StringContent(album), "album");
         if (!string.IsNullOrWhiteSpace(genre)) multipart.Add(new StringContent(genre), "genre");
         if (!string.IsNullOrWhiteSpace(releaseDate)) multipart.Add(new StringContent(releaseDate), "releaseDate");
+        // Explicit field — decouples the admin-visible display name from the WAV part's content-disposition filename.
+        if (!string.IsNullOrWhiteSpace(originalFileName)) multipart.Add(new StringContent(originalFileName), "originalFileName");
         multipart.Add(new StringContent(createdByUserId.ToString()), "createdByUserId");
 
         var client = _httpClientFactory.CreateClient(ContentCmsClientName);

DeepDrftManager/Services/ICmsTrackService.cs

@@ -15,6 +15,8 @@ public interface ICmsTrackService
     /// Proxy a WAV upload to DeepDrftAPI. The Content API owns the dual-database write and
     /// returns the persisted track carrying the SQL-assigned <c>Id</c>. A vault-without-SQL
     /// orphan is handled and logged server-side; here it surfaces as a failed result.
+    /// <paramref name="originalFileName"/> is the browser's filename, captured at upload time and
+    /// stored as metadata; it is not user-editable afterwards.
     /// </summary>
     Task<ResultContainer<TrackDto>> UploadTrackAsync(
         Stream wavStream,
@@ -25,6 +27,7 @@ public interface ICmsTrackService
         string? album,
         string? genre,
         string? releaseDate,
+        string? originalFileName,
         long createdByUserId,
         CancellationToken ct = default);