feat: add copying message text via long press

lib/widgets/messages/message_text.dart

@@ -1,7 +1,8 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:recon/models/message.dart';
 import 'package:recon/widgets/formatted_text.dart';
 import 'package:recon/widgets/messages/message_state_indicator.dart';
-import 'package:flutter/material.dart';
 
 class MessageText extends StatelessWidget {
   const MessageText({required this.message, this.foregroundColor, super.key});
@@ -11,7 +12,14 @@ class MessageText extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Column(
+    return GestureDetector(
+      onLongPress: () async {
+        await Clipboard.setData(ClipboardData(text: message.content)).then((_) {
+          ScaffoldMessenger.of(context).showSnackBar(
+              const SnackBar(content: Text("Copied to clipboard")));
+        });
+      },
+      child: Column(
         crossAxisAlignment: CrossAxisAlignment.end,
         children: [
           Container(
@@ -21,8 +29,7 @@ class MessageText extends StatelessWidget {
               message.formattedContent,
               softWrap: true,
               maxLines: null,
-              style: Theme
+              style: Theme.of(context)
-                  .of(context)
                   .textTheme
                   .bodyLarge
                   ?.copyWith(color: foregroundColor),
@@ -32,10 +39,14 @@ class MessageText extends StatelessWidget {
             mainAxisSize: MainAxisSize.min,
             mainAxisAlignment: MainAxisAlignment.end,
             children: [
-              MessageStateIndicator(message: message, foregroundColor: foregroundColor,),
+              MessageStateIndicator(
+                message: message,
+                foregroundColor: foregroundColor,
+              ),
             ],
           ),
         ],
+      ),
     );
   }
 }