Make release Medium writable via upload + meta-edit; resolve detail-page track by releaseId not album title

DeepDrftManager/Services/CmsTrackService.cs

@@ -64,8 +64,8 @@ public class CmsTrackService : ICmsTrackService
         multipart.Add(new StringContent(createdByUserId.ToString()), "createdByUserId");
         multipart.Add(new StringContent(releaseType.ToString()), "releaseType");
         multipart.Add(new StringContent(trackNumber.ToString()), "trackNumber");
-        // Forward-compatible: the upload endpoint does not bind a "medium" field yet (server defaults
-        // to Cut). Sent so the value round-trips once the API grows the parameter; ignored until then.
+        // The upload endpoint binds "medium" to the created release's ReleaseMedium (defaulting to Cut
+        // for an unrecognised value). Authoritative only when this upload creates the release.
         multipart.Add(new StringContent(medium.ToString()), "medium");
 
         var client = _httpClientFactory.CreateClient(ContentCmsClientName);
@@ -374,6 +374,7 @@ public class CmsTrackService : ICmsTrackService
         string? album, string? genre, DateOnly? releaseDate,
         string? imagePath = null,
         ReleaseType? releaseType = null,
+        ReleaseMedium? medium = null,
         int? trackNumber = null,
         CancellationToken ct = default)
     {
@@ -387,6 +388,7 @@ public class CmsTrackService : ICmsTrackService
             releaseDate,
             imagePath,
             releaseType = releaseType.HasValue ? (int?)releaseType.Value : null,
+            medium = medium.HasValue ? (int?)medium.Value : null,
             trackNumber,
         };
 

DeepDrftManager/Services/ICmsTrackService.cs

@@ -18,10 +18,9 @@ public interface ICmsTrackService
     /// 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.
-    /// <paramref name="medium"/> sets the parent release's <see cref="ReleaseMedium"/>. NOTE: the
-    /// current <c>POST api/track/upload</c> endpoint has no <c>medium</c> form field, so the value is
-    /// sent forward-compatibly and ignored server-side until the API binds it (Cut is the server
-    /// default). Wiring the selector through here keeps the CMS ready for that API change.
+    /// <paramref name="medium"/> sets the parent release's <see cref="ReleaseMedium"/> when this upload
+    /// creates the release. The medium is authoritative only on creation — adding a track to an existing
+    /// release never changes its medium (that is the edit path, <see cref="UpdateAsync"/>).
     /// </summary>
     Task<ResultContainer<TrackDto>> UploadTrackAsync(
         Stream wavStream,
@@ -80,13 +79,16 @@ public interface ICmsTrackService
     /// <summary>
     /// Update a track's metadata via <c>PUT api/track/meta/{id}</c>. EntryKey is immutable and
     /// not part of the update. <paramref name="imagePath"/> is tri-state: <c>null</c> leaves the
-    /// cover art unchanged, <c>""</c> clears it, and any other value sets it.
+    /// cover art unchanged, <c>""</c> clears it, and any other value sets it. <paramref name="medium"/>
+    /// is null = no change; a non-null, non-Cut value resets the release's ReleaseType to its default
+    /// server-side, since ReleaseType is meaningful only for Cut.
     /// </summary>
     Task<Result> UpdateAsync(
         long id, string trackName, string artist,
         string? album, string? genre, DateOnly? releaseDate,
         string? imagePath = null,
         ReleaseType? releaseType = null,
+        ReleaseMedium? medium = null,
         int? trackNumber = null,
         CancellationToken ct = default);