fix(gui): reset selected tab on last tabs closed

jadx-gui/src/main/java/jadx/gui/settings/JadxProject.java

@@ -158,9 +158,6 @@ public class JadxProject {
 				.map(TabStateViewAdapter::build)
 				.filter(Objects::nonNull)
 				.collect(Collectors.toList());
-		if (tabStateList.isEmpty()) {
-			return;
-		}
 		if (data.setOpenTabs(tabStateList)) {
 			changed();
 		}

jadx-gui/src/main/java/jadx/gui/ui/tab/TabbedPane.java

@@ -455,6 +455,9 @@ public class TabbedPane extends JTabbedPane implements ITabStatesListener {
 				} else if (removalIdx == 0) { // select right tab
 					setSelectedIndex(removalIdx + 1);
 				}
+			} else {
+				// no other tabs => inform controller to reset selection
+				controller.deselectTab();
 			}
 		}
 

jadx-gui/src/main/java/jadx/gui/ui/tab/TabsController.java

@@ -107,6 +107,10 @@ public class TabsController {
 		listeners.forEach(l -> l.onTabSelect(selectedTab));
 	}
 
+	public void deselectTab() {
+		selectedTab = null;
+	}
+
 	/**
 	 * Jump to node definition
 	 */