I am slowly losing sanity

Lactose/Jobs/ThumbnailJob.cs

@@ -13,7 +13,7 @@ public class ThumbnailJob : Job {
     ThumbnailJob?         ParentJob;
     List<ThumbnailJob>?   subJobs;
     Asset?                Asset;
-    string                ThumbnailPath;
+    string?               ThumbnailPath;
     int                   processedAssets = 0;
     int                   totalAssets     = 1; // Avoid division by zero
     int                   ThumbnailSize;
@@ -36,8 +36,7 @@ public class ThumbnailJob : Job {
         JobManager         = jobManager;
         Name               = "Thumbnail Generation Job";
     }
-
-
+    
     public ThumbnailJob(
         ThumbnailJob parentJob,
         Asset asset,
@@ -61,19 +60,32 @@ public class ThumbnailJob : Job {
         if (ParentJob == null)
             MasterJob(token);
         else
-            SlaveJob();
+            SlaveJob(token);
     }
 
-    void SlaveJob() {
+    void SlaveJob(CancellationToken token) {
+        if (token.IsCancellationRequested) {
+            Status.Cancel("Cancellation requested from user.");
+            return;
+        }
+        
         if (Asset == null) {
             Logger.LogError("Sub-job started without an asset. Canceling job.");
             Status.Fail("Sub-job started without an asset. Canceling job.");
             return;
         }
-
+        
+        Status.Start();
+        
         try {
+            if (string.IsNullOrEmpty(Asset.OriginalPath) || !File.Exists(Asset.OriginalPath)) {
+                var msg = $"Original file for asset ID {Asset.Id} not found at path {Asset.OriginalPath}";
+                Logger.LogWarning(msg);
+                Status.Fail(msg);
+                return;
+            }
+            
             using var image = Image.Load(Asset.OriginalPath);
-
             image.Mutate(x => x.Resize(
                     new ResizeOptions {
                         Size    = new Size(ThumbnailSize),
@@ -83,9 +95,17 @@ public class ThumbnailJob : Job {
                 )
             );
 
+            if (ThumbnailPath == null) {
+                var msg = "Thumbnail path is not set. Cannot save thumbnail.";
+                Logger.LogError(msg);
+                Status.Fail(msg);
+                return;
+            }
+
             var path = PathFromGuid(Asset.Id, ThumbnailPath);
 
-            if (!Directory.Exists(path)) { Directory.CreateDirectory(Path.GetDirectoryName(path)); }
+            if (!Directory.Exists(path)) 
+                Directory.CreateDirectory(Path.GetDirectoryName(path)!);
 
             image.SaveAsJpeg(
                 path,
@@ -99,12 +119,13 @@ public class ThumbnailJob : Job {
             Asset.ThumbnailPath = path;
             AssetRepository.Update(Asset);
             AssetRepository.Save();
-            Logger.LogInformation($"Thumbnail generated for asset ID {Asset.Id} at {path}");
-            Status.Complete($"Thumbnail generated for asset ID {Asset.Id} at {path}");
         } catch (Exception ex) {
             Logger.LogError(ex, $"Failed to generate thumbnail for asset ID {Asset.Id}");
             Status.Fail($"Error: {ex.Message}");
+            return;
         }
+        Logger.LogInformation($"Thumbnail generated for asset ID {Asset.Id} at {Asset.ThumbnailPath}");
+        Status.Complete($"Thumbnail generated for asset ID {Asset.Id} at {Asset.ThumbnailPath}");
     }
 
     void MasterJob(CancellationToken token) {