🐛 Dozens of bug fixes

lib/widgets/content/embed/link.dart

@@ -202,9 +202,9 @@ class _EmbedLinkWidgetState extends State<EmbedLinkWidget> {
                           const Gap(8),
 
                           // Title
-                          if (widget.link.title.isNotEmpty) ...[
+                          if (widget.link.title?.isNotEmpty ?? false) ...[
                             Text(
-                              widget.link.title,
+                              widget.link.title!,
                               style: theme.textTheme.titleMedium?.copyWith(
                                 fontWeight: FontWeight.w600,
                               ),

lib/widgets/share/share_sheet.dart

@@ -998,14 +998,15 @@ class _LinkPreview extends ConsumerWidget {
                         overflow: TextOverflow.ellipsis,
                       ),
                     // Title
-                    Text(
-                      embed.title,
-                      style: Theme.of(context).textTheme.titleSmall?.copyWith(
-                        fontWeight: FontWeight.w600,
+                    if (embed.title != null)
+                      Text(
+                        embed.title!,
+                        style: Theme.of(context).textTheme.titleSmall?.copyWith(
+                          fontWeight: FontWeight.w600,
+                        ),
+                        maxLines: 2,
+                        overflow: TextOverflow.ellipsis,
                       ),
-                      maxLines: 2,
-                      overflow: TextOverflow.ellipsis,
-                    ),
                     // Description
                     if (embed.description != null &&
                         embed.description!.isNotEmpty)