Fix for flutter#6171 (flutter#8220)

- Added live indicator when run or debug flutter app in the tool window
tab.

---

- [x] I’ve reviewed the contributor guide and applied the relevant
portions to this PR.

<details>
  <summary>Contribution guidelines:</summary><br>

- See our [contributor
guide]([https://github.com/dart-lang/sdk/blob/main/CONTRIBUTING.md](https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview)
for general expectations for PRs.
- Larger or significant changes should be discussed in an issue before
creating a PR.
- Dart contributions to our repos should follow the [Dart style
guide](https://dart.dev/guides/language/effective-dart) and use `dart
format`.
- Java and Kotlin contributions should strive to follow Java and Kotlin
best practices
([discussion](flutter#8098)).
</details>

Author: JAPNITSINGH

AUTHORS

@@ -24,3 +24,4 @@ Wagner Silvestre <[email protected]>
 Eli Albert <[email protected]>
 Mohamed El Sayed <[email protected]>
 Edwin Ludik <[email protected]>
+Japnit Singh <[email protected]>

flutter-idea/src/io/flutter/run/LaunchState.java

@@ -50,6 +50,7 @@
 import io.flutter.run.daemon.DaemonConsoleView;
 import io.flutter.run.daemon.DeviceService;
 import io.flutter.run.daemon.FlutterApp;
+import io.flutter.toolwindow.ToolWindowBadgeUpdater;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -156,6 +157,7 @@ protected RunContentDescriptor launch(@NotNull ExecutionEnvironment env) throws
     final FlutterLaunchMode launchMode = FlutterLaunchMode.fromEnv(env);
     final RunContentDescriptor descriptor;
     if (launchMode.supportsDebugConnection()) {
+      ToolWindowBadgeUpdater.updateBadgedIcon(app, project);
       descriptor = createDebugSession(env, app, result).getRunContentDescriptor();
     }
     else {

flutter-idea/src/io/flutter/toolwindow/ToolWindowBadgeUpdater.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2025 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+package io.flutter.toolwindow;
+
+import com.intellij.icons.AllIcons;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.wm.ToolWindow;
+import com.intellij.openapi.wm.ToolWindowId;
+import com.intellij.openapi.wm.ToolWindowManager;
+import com.intellij.ui.BadgeIcon;
+import io.flutter.run.common.RunMode;
+import io.flutter.run.daemon.FlutterApp;
+
+import java.awt.Color;
+import java.awt.Paint;
+import java.util.Objects;
+import javax.swing.Icon;
+
+public class ToolWindowBadgeUpdater {
+  public static final Paint BADGE_PAINT = Color.decode("#5ca963");
+
+  /**
+   * Updates the tool window icons for RUN or DEBUG mode with a green badge.
+   *
+   * @param app The FlutterApp instance running in a given mode.
+   * @param project The current IntelliJ project context.
+   */
+  public static void updateBadgedIcon(FlutterApp app, Project project) {
+    final ToolWindowManager manager = ToolWindowManager.getInstance(Objects.requireNonNull(project));
+    final ToolWindow runToolWindow = manager.getToolWindow(ToolWindowId.RUN);
+    final ToolWindow debugToolWindow = manager.getToolWindow(ToolWindowId.DEBUG);
+
+    if(Objects.requireNonNull(app).getMode() == RunMode.RUN) {
+      if (runToolWindow != null) {
+        manager.invokeLater(() -> {
+          Icon baseIcon = AllIcons.Toolwindows.ToolWindowRun;
+          BadgeIcon iconWithBadge = new BadgeIcon(baseIcon, BADGE_PAINT);
+
+          runToolWindow.setIcon(iconWithBadge);
+        });
+      }
+    }
+    else if(app.getMode() == RunMode.DEBUG) {
+      manager.invokeLater(() -> {
+        Icon baseIcon = AllIcons.Toolwindows.ToolWindowDebugger;
+        BadgeIcon iconWithBadge = new BadgeIcon(baseIcon, BADGE_PAINT);
+
+        Objects.requireNonNull(debugToolWindow).setIcon(iconWithBadge);
+      });
+    }
+
+  }
+}