Fix: Orden de Fotos y Asignación de Portada

Backend/MotoresArgentinosV2.API/Controllers/AdsV2Controller.cs

@@ -521,6 +521,34 @@ public class AdsV2Controller : ControllerBase
         return Ok(models);
     }
 
+    private async Task NormalizeAdPhotosAsync(int adId)
+    {
+        var photos = await _context.AdPhotos
+                                   .Where(p => p.AdID == adId)
+                                   .OrderBy(p => p.SortOrder)
+                                   .ThenBy(p => p.PhotoID)
+                                   .ToListAsync();
+
+        bool coverAssigned = false;
+        for (int i = 0; i < photos.Count; i++)
+        {
+            photos[i].SortOrder = i;
+            
+            if (photos[i].IsCover && !coverAssigned) {
+                coverAssigned = true;
+            } else {
+                photos[i].IsCover = false;
+            }
+        }
+
+        if (!coverAssigned && photos.Count > 0)
+        {
+            photos[0].IsCover = true;
+        }
+
+        await _context.SaveChangesAsync();
+    }
+
     [HttpPost("{id}/upload-photos")]
     public async Task<IActionResult> UploadPhotos(int id, [FromForm] IFormFileCollection files)
     {
@@ -573,6 +601,7 @@ public class AdsV2Controller : ControllerBase
         if (uploadedCount > 0)
         {
             await _context.SaveChangesAsync();
+            await NormalizeAdPhotosAsync(id);
             return Ok(new
             {
                 message = $"{uploadedCount} fotos procesadas.",
@@ -604,6 +633,8 @@ public class AdsV2Controller : ControllerBase
         _context.AdPhotos.Remove(photo);
         await _context.SaveChangesAsync();
 
+        await NormalizeAdPhotosAsync(photo.AdID);
+
         return NoContent();
     }