sync plex library name changes (#2783)

* sync plex library name changes

* feedback

CHANGELOG.md

@@ -33,6 +33,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix playback of AC3 audio when targeting stereo output and input layout changes mid-stream
 - Use other video artwork in XMLTV template
 - Properly update (add or remove) artwork for all local media libraries when files have changed
+- Sync plex library name changes
 
 ## [26.1.1] - 2026-01-08
 ### Fixed

ErsatzTV.Infrastructure/Data/Repositories/MediaSourceRepository.cs

@@ -171,8 +171,9 @@ public class MediaSourceRepository(IDbContextFactory<TvContext> dbContextFactory
         foreach (PlexLibrary incoming in toUpdate)
         {
             Option<PlexLibrary> maybeExisting = await dbContext.PlexLibraries
+                .Where(pl => pl.MediaSourceId == plexMediaSourceId)
                 .Include(l => l.Paths)
-                .SelectOneAsync(l => l.Key, l => l.Key == incoming.Key, cancellationToken);
+                .SingleOrDefaultAsync(l => l.Key == incoming.Key, cancellationToken);
 
             foreach (PlexLibrary existingLibrary in maybeExisting)
             {
@@ -201,6 +202,8 @@ public class MediaSourceRepository(IDbContextFactory<TvContext> dbContextFactory
                         existing.Path = path.Path;
                     }
                 }
+
+                existingLibrary.Name = incoming.Name;
             }
         }