chore(studio): bump editor lock to 0.2.1 (live status + fit-to-screen)

Pulls in:
 - Live step status on the graph during runs (the graph
   highlights running / done / failed / awaiting nodes
   alongside the run-tab list).
 - Empty-graph call-to-action overlay with an Add step
   button so the first opened-but-empty flow points the
   operator at the right action.
 - Fit-to-screen button + auto-fit on first open of each
   flow so wide flows aren't cut off in the default
   viewport.

Version 0.52.0 -> 0.52.1.

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 = '0.52.0';
+const String kStudioVersion = '0.52.1';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();

pubspec.lock

@@ -125,10 +125,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: "870cbc29f71a7fd9972755203714274ac128897b"
+      resolved-ref: cae5c94c4dd9fd7242985eb1a8cff07c7d5c4a48
       url: "https://git.flemming.ai/fai/studio-flow-editor"
     source: git
-    version: "0.2.0"
+    version: "0.2.1"
   fake_async:
     dependency: transitive
     description:

pubspec.yaml

@@ -1,7 +1,7 @@
 name: fai_studio
 description: "F∆I Studio — desktop GUI for the F∆I hub"
 publish_to: 'none'
-version: 0.52.0
+version: 0.52.1
 
 environment:
   sdk: ^3.11.0-200.1.beta