🐛 Fix desktop share post as image do not include file extension name

lib/widgets/post/post_item.dart

@@ -113,7 +113,7 @@ class PostItem extends StatelessWidget {
         sharePositionOrigin: box!.localToGlobal(Offset.zero) & box.size,
       );
     } else {
-      await FileSaver.instance.saveFile(name: 'Solar Network Post #${data.id}', file: imageFile);
+      await FileSaver.instance.saveFile(name: 'Solar Network Post #${data.id}.png', file: imageFile);
     }
 
     await imageFile.delete();

pubspec.lock

@@ -700,10 +700,10 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_markdown
-      sha256: "255b00afa1a7bad19727da6a7780cf3db6c3c12e68d302d85e0ff1fdf173db9e"
+      sha256: e37f4c69a07b07bb92622ef6b131a53c9aae48f64b176340af9e8e5238718487
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.4+3"
+    version: "0.7.5"
   flutter_native_splash:
     dependency: "direct dev"
     description: