chore(studio): editor 0.5.0 — unified port model

Picks up fai_studio_flow_editor 0.5.0 (commit 099cd18):

 - Each port is a single dot (no more inline + canvas
   duplication). Sized to match label rows.
 - Inputs endpoint dots sit on the RIGHT edge (data flows
   out), labels right-aligned. Outputs endpoint stays on
   the left. Step input dots stay on the left.
 - Filled when the port participates in an edge, outlined
   when dangling. Type-coloured for inputs-endpoint dots.
 - Right-click a wired input port to Disconnect — clears
   the with-field / output expression cleanly.

Version 0.53.1 -> 0.53.2.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/main.dart

@@ -26,7 +26,7 @@ import 'widgets/widgets.dart';
 /// Studio's own build version. Bump on every UI commit so the
 /// running app self-identifies — visible in the sidebar header
 /// and quick-glance proof that you're seeing the current build.
-const String kStudioVersion = '0.53.1';
+const String kStudioVersion = '0.53.2';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();