feat: Relist button pre-populates form with aspects and shipping from saved listing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

EbayListingTool/Views/MainWindow.xaml.cs

@@ -39,6 +39,11 @@ public partial class MainWindow : MetroWindow
 
         // Saved Listings tab
         SavedView.Initialise(_savedService, _priceLookupService);
+        SavedView.RelistRequested += listing =>
+        {
+            SingleView.PopulateFromSavedListing(listing);
+            SwitchToNewListingTab();
+        };
 
         // New Listing + Bulk tabs
         SingleView.Initialise(_listingService, _categoryService, _aiService, _auth, _aspectsService, _savedService);

EbayListingTool/Views/SavedListingsView.xaml.cs

@@ -806,6 +806,7 @@ public partial class SavedListingsView : UserControl
 
     private void RelistBtn_Click(object sender, RoutedEventArgs e)
     {
-        // TODO: implement in Task 5
+        if (_selected != null)
+            RelistRequested?.Invoke(_selected);
     }
 }

EbayListingTool/Views/SingleItemView.xaml.cs

@@ -874,4 +874,83 @@ public partial class SingleItemView : UserControl
         AspectsItemsControl.ItemsSource = panels;
         AspectsPanel.Visibility = _currentAspects.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
     }
+
+    /// <summary>Pre-fills the form from a saved listing for relisting.</summary>
+    public async void PopulateFromSavedListing(SavedListing listing)
+    {
+        _draft = new ListingDraft { Postcode = PostcodeBox.Text };
+        _draft.Sku = Guid.NewGuid().ToString("N")[..12].ToUpper(); // fresh SKU — not a duplicate
+        _currentAspects = new();
+        _lastAspectsCategoryId = "";
+
+        TitleBox.Text        = "";
+        DescriptionBox.Text  = "";
+        CategoryBox.Text     = "";
+        CategoryIdLabel.Text = "(no category)";
+        PriceBox.Value       = 0;
+        QuantityBox.Value    = 1;
+        ConditionBox.SelectedIndex = 3;
+        FormatBox.SelectedIndex    = 0;
+        PhotosPanel.Children.Clear();
+        UpdatePhotoPanel();
+        AspectsPanel.Visibility         = Visibility.Collapsed;
+        SuccessPanel.Visibility         = Visibility.Collapsed;
+        PriceSuggestionPanel.Visibility = Visibility.Collapsed;
+
+        TitleBox.Text       = listing.Title;
+        DescriptionBox.Text = listing.Description;
+        PriceBox.Value      = (double)listing.Price;
+
+        // Condition
+        ConditionBox.SelectedIndex = listing.Condition switch
+        {
+            ItemCondition.New                  => 0,
+            ItemCondition.OpenBox              => 1,
+            ItemCondition.Refurbished          => 2,
+            ItemCondition.Used                 => 3,
+            ItemCondition.ForPartsOrNotWorking => 4,
+            _ => 3
+        };
+
+        // Postage + shipping cost
+        PostageBox.SelectedIndex = listing.Postage switch
+        {
+            PostageOption.RoyalMailFirstClass  => 0,
+            PostageOption.RoyalMailSecondClass => 1,
+            PostageOption.RoyalMailTracked24   => 2,
+            PostageOption.RoyalMailTracked48   => 3,
+            PostageOption.FreePostage          => 4,
+            PostageOption.CollectionOnly       => 5,
+            _ => 3
+        };
+        ShippingCostBox.Value = (double)listing.ShippingCost;
+        _draft.ShippingCost   = listing.ShippingCost;
+
+        // Category
+        if (!string.IsNullOrEmpty(listing.CategoryId))
+        {
+            _suppressCategoryLookup = true;
+            _draft.CategoryId    = listing.CategoryId;
+            _draft.CategoryName  = listing.Category;
+            CategoryBox.Text     = listing.Category;
+            CategoryIdLabel.Text = $"ID: {listing.CategoryId}";
+            _suppressCategoryLookup = false;
+        }
+
+        // Restore saved aspects into draft BEFORE LoadAspectsAsync so they aren't wiped
+        foreach (var kv in listing.Aspects)
+            _draft.Aspects[kv.Key] = kv.Value;
+
+        // Photos
+        var validPaths = listing.PhotoPaths.Where(p => File.Exists(p)).ToArray();
+        if (validPaths.Length > 0)
+            AddPhotos(validPaths);
+
+        // Load aspects from API — set _lastAspectsCategoryId first so Clear() is skipped
+        if (!string.IsNullOrEmpty(listing.CategoryId))
+        {
+            _lastAspectsCategoryId = listing.CategoryId;
+            await LoadAspectsAsync(listing.CategoryId);
+        }
+    }
 }