chore: more refactorings to make stuff more similar

tests/renderer/utils/windowEvents.test.ts

@@ -0,0 +1,61 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { addWindowEventListener, dispatchWindowEvent } from '../../../src/renderer/utils/windowEvents';
+
+describe('windowEvents utils', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+
+    const listeners = new Map<string, Set<(event: Event) => void>>();
+    (window as any).addEventListener = vi.fn((type: string, listener: (event: Event) => void) => {
+      if (!listeners.has(type)) {
+        listeners.set(type, new Set());
+      }
+      listeners.get(type)?.add(listener);
+    });
+    (window as any).removeEventListener = vi.fn((type: string, listener: (event: Event) => void) => {
+      listeners.get(type)?.delete(listener);
+    });
+    (window as any).dispatchEvent = vi.fn((event: Event) => {
+      listeners.get(event.type)?.forEach((listener) => listener(event));
+      return true;
+    });
+  });
+
+  it('dispatches custom events with detail payload', () => {
+    const listener = vi.fn();
+    addWindowEventListener('bds:scripts-changed', listener);
+
+    const dispatched = dispatchWindowEvent('bds:scripts-changed', { scriptId: 'script-1' });
+
+    expect(dispatched).toBe(true);
+    expect(listener).toHaveBeenCalledTimes(1);
+    const event = listener.mock.calls[0][0] as CustomEvent<{ scriptId: string }>;
+    expect(event.detail).toEqual({ scriptId: 'script-1' });
+  });
+
+  it('returns no-op unsubscribe when listener APIs are unavailable', () => {
+    const originalAdd = (window as any).addEventListener;
+    const originalRemove = (window as any).removeEventListener;
+    (window as any).addEventListener = undefined;
+    (window as any).removeEventListener = undefined;
+
+    const unsubscribe = addWindowEventListener('bds:scripts-changed', vi.fn());
+    expect(typeof unsubscribe).toBe('function');
+    expect(() => unsubscribe()).not.toThrow();
+
+    (window as any).addEventListener = originalAdd;
+    (window as any).removeEventListener = originalRemove;
+  });
+
+  it('subscribes and unsubscribes listeners', () => {
+    const listener = vi.fn();
+    const unsubscribe = addWindowEventListener('bds:scripts-changed', listener);
+
+    dispatchWindowEvent('bds:scripts-changed');
+    expect(listener).toHaveBeenCalledTimes(1);
+
+    unsubscribe();
+    dispatchWindowEvent('bds:scripts-changed');
+    expect(listener).toHaveBeenCalledTimes(1);
+  });
+});