feat: Limit height of text messages and expand if selected

lib/pages/chat/events/html_message.dart

@@ -23,6 +23,7 @@ class HtmlMessage extends StatelessWidget {
   final void Function(LinkableElement) onOpen;
   final String? eventId;
   final Set<Event>? checkboxCheckedEvents;
+  final bool limitHeight;
 
   const HtmlMessage({
     super.key,
@@ -34,6 +35,7 @@ class HtmlMessage extends StatelessWidget {
     required this.onOpen,
     this.eventId,
     this.checkboxCheckedEvents,
+    this.limitHeight = true,
   });
 
   /// Keep in sync with: https://spec.matrix.org/latest/client-server-api/#mroommessage-msgtypes
@@ -513,6 +515,8 @@ class HtmlMessage extends StatelessWidget {
         fontSize: fontSize,
         color: textColor,
       ),
+      maxLines: limitHeight ? 64 : null,
+      overflow: TextOverflow.fade,
     );
   }
 }

lib/pages/chat/events/message.dart

@@ -418,6 +418,7 @@ class Message extends StatelessWidget {
                                                 onInfoTab: onInfoTab,
                                                 borderRadius: borderRadius,
                                                 timeline: timeline,
+                                                selected: selected,
                                               ),
                                               if (event.hasAggregatedEvents(
                                                 timeline,

lib/pages/chat/events/message_content.dart

@@ -30,6 +30,7 @@ class MessageContent extends StatelessWidget {
   final void Function(Event)? onInfoTab;
   final BorderRadius borderRadius;
   final Timeline timeline;
+  final bool selected;
 
   const MessageContent(
     this.event, {
@@ -39,6 +40,7 @@ class MessageContent extends StatelessWidget {
     required this.textColor,
     required this.linkColor,
     required this.borderRadius,
+    required this.selected,
   });
 
   void _verifyOrRequestKey(BuildContext context) async {
@@ -269,6 +271,7 @@ class MessageContent extends StatelessWidget {
                 textColor: textColor,
                 room: event.room,
                 fontSize: AppConfig.fontSizeFactor * AppConfig.messageFontSize,
+                limitHeight: !selected,
                 linkStyle: TextStyle(
                   color: linkColor,
                   fontSize: