feat: add Save(ListingDraft) overload capturing aspects and shipping

EbayListingTool/Services/SavedListingsService.cs

@@ -78,6 +78,76 @@ public class SavedListingsService
         return (listing, sources.Count - photoPaths.Count);
     }
 
+    /// <summary>
+    /// Saves a fully-posted listing draft, preserving aspects, postage, and shipping cost.
+    /// </summary>
+    public (SavedListing Listing, int SkippedPhotos) Save(ListingDraft draft)
+    {
+        return SaveFull(
+            draft.Title,
+            draft.Description,
+            draft.Price,
+            draft.CategoryName,
+            draft.CategoryId,
+            draft.Condition,
+            draft.Postage,
+            draft.ShippingCost,
+            draft.Aspects,
+            draft.Description,
+            draft.PhotoPaths
+        );
+    }
+
+    private (SavedListing Listing, int SkippedPhotos) SaveFull(
+        string title, string description, decimal price,
+        string category, string categoryId,
+        ItemCondition condition, PostageOption postage, decimal shippingCost,
+        Dictionary<string, string> aspects,
+        string conditionNotes,
+        IEnumerable<string> sourcePaths)
+    {
+        var safeName  = MakeSafeFilename(title);
+        var exportDir = UniqueDir(Path.Combine(ExportsDir, safeName));
+        Directory.CreateDirectory(exportDir);
+
+        var photoPaths = new List<string>();
+        var sources    = sourcePaths.ToList();
+        for (int i = 0; i < sources.Count; i++)
+        {
+            var src = sources[i];
+            if (!File.Exists(src)) continue;
+            var ext  = Path.GetExtension(src);
+            var dest = i == 0
+                ? Path.Combine(exportDir, $"{safeName}{ext}")
+                : Path.Combine(exportDir, $"{safeName}_{i + 1}{ext}");
+            File.Copy(src, dest, overwrite: true);
+            photoPaths.Add(dest);
+        }
+
+        var textFile = Path.Combine(exportDir, $"{safeName}.txt");
+        File.WriteAllText(textFile, BuildTextExport(title, description, price, category, conditionNotes));
+
+        var listing = new SavedListing
+        {
+            Title          = title,
+            Description    = description,
+            Price          = price,
+            Category       = category,
+            CategoryId     = categoryId,
+            Condition      = condition,
+            Postage        = postage,
+            ShippingCost   = shippingCost,
+            Aspects        = new Dictionary<string, string>(aspects),
+            ConditionNotes = conditionNotes,
+            ExportFolder   = exportDir,
+            PhotoPaths     = photoPaths
+        };
+
+        _listings.Insert(0, listing);
+        Persist();
+        return (listing, sources.Count - photoPaths.Count);
+    }
+
     public void Delete(SavedListing listing)
     {
         _listings.Remove(listing);