fix: reduce spacing around link preview card - remove top padding, tighten gap above

sojorn_app/lib/widgets/post/post_link_preview.dart

@@ -4,9 +4,6 @@ import '../../models/post.dart';
 import '../../theme/app_theme.dart';
 import 'post_view_mode.dart';
 
-/// Full-width link preview card shown below the post body.
-/// Displays OG image as a full-width thumbnail (same sizing as post images),
-/// with title, description, and site name overlaid/below.
 class PostLinkPreview extends StatelessWidget {
   final Post post;
   final PostViewMode mode;
@@ -40,9 +37,7 @@ class PostLinkPreview extends StatelessWidget {
     final description = post.linkPreviewDescription ?? '';
     final siteName = post.linkPreviewSiteName ?? '';
 
-    return Padding(
+    return GestureDetector(
-      padding: const EdgeInsets.only(top: 12),
-      child: GestureDetector(
         onTap: () => _launchUrl(post.linkPreviewUrl!),
         child: Container(
           decoration: BoxDecoration(
@@ -148,7 +143,6 @@ class PostLinkPreview extends StatelessWidget {
             ],
           ),
         ),
-      ),
     );
   }
 

sojorn_app/lib/widgets/sojorn_post_card.dart

@@ -281,7 +281,7 @@ class _sojornPostCardState extends ConsumerState<sojornPostCard> {
                       ],
                       // Link preview card after post body
                       if (post.hasLinkPreview) ...[
-                        const SizedBox(height: 16),
+                        const SizedBox(height: 8),
                         PostLinkPreview(
                           post: post,
                           mode: mode,