Fixing builds and workflows

src/app.rs

@@ -48,6 +48,12 @@ pub struct App {
     pub panel: PanelState,
 }
 
+impl Default for App {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl App {
     pub fn new() -> Self {
         let variables = Arc::new(Mutex::new(HashMap::new()));