feat: phase 5 refactor

tests/renderer/navigation/activityExecution.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it, vi } from 'vitest';
+import {
+  executeActivityClick,
+  executeActivityClickActions,
+} from '../../../src/renderer/navigation/activityExecution';
+import type { ActivityAction, ActivitySnapshot } from '../../../src/renderer/navigation/activityBehavior';
+
+const snapshot: ActivitySnapshot = {
+  activeView: 'media',
+  sidebarVisible: false,
+  tabs: [],
+  activeTabId: null,
+};
+
+describe('activityExecution', () => {
+  it('applies action descriptors in order', () => {
+    const actions: ActivityAction[] = [
+      { type: 'setActiveView', view: 'posts' },
+      { type: 'toggleSidebar' },
+    ];
+
+    const setActiveView = vi.fn();
+    const toggleSidebar = vi.fn();
+
+    executeActivityClickActions(actions, { setActiveView, toggleSidebar });
+
+    expect(setActiveView).toHaveBeenCalledWith('posts');
+    expect(toggleSidebar).toHaveBeenCalledTimes(1);
+    expect(setActiveView.mock.invocationCallOrder[0]).toBeLessThan(toggleSidebar.mock.invocationCallOrder[0]);
+  });
+
+  it('executes canonical click behavior from activity snapshot', () => {
+    const setActiveView = vi.fn();
+    const toggleSidebar = vi.fn();
+
+    executeActivityClick(snapshot, 'posts', { setActiveView, toggleSidebar });
+
+    expect(setActiveView).toHaveBeenCalledWith('posts');
+    expect(toggleSidebar).toHaveBeenCalledTimes(1);
+  });
+});