add support for article specific og image

hub/services/models/articles.py

@@ -51,6 +51,15 @@ class Article(ImageReference):
         help_text="Link this article to a cloud provider",
     )
 
+    # Open Graph image for social sharing
+    og_image = models.ImageField(
+        upload_to="article_og_images/",
+        blank=True,
+        null=True,
+        validators=[validate_image_size],
+        help_text="Optional Open Graph image for social sharing (max 1MB). If not provided, the article's main image will be used."
+    )
+
     # Publishing controls
     is_published = models.BooleanField(
         default=False, help_text="Only published articles are visible to users"
@@ -90,6 +99,15 @@ class Article(ImageReference):
             return self.image_library.image
         return None
 
+    @property
+    def get_og_image(self):
+        """Returns the Open Graph image for social sharing"""
+        # Use specific OG image if available
+        if self.og_image:
+            return self.og_image
+        # Fall back to main article image
+        return self.get_image
+
     @property
     def related_to(self):
         """Returns a string describing what this article is related to"""