chore: phase 2 and 3 refactors

tests/renderer/navigation/sectionActivation.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it, vi } from 'vitest';
+import { activateSidebarSection } from '../../../src/renderer/navigation/sectionActivation';
+
+describe('sectionActivation', () => {
+  it('opens editor first and delays section activation when editor is not active', () => {
+    const ensureEditor = vi.fn();
+    const activateSection = vi.fn();
+    const schedule = vi.fn((callback: () => void) => callback());
+
+    activateSidebarSection({
+      isEditorTabActive: false,
+      ensureEditorTabActive: ensureEditor,
+      activateSection,
+      schedule,
+      delayWhenOpeningEditorMs: 100,
+    });
+
+    expect(ensureEditor).toHaveBeenCalledTimes(1);
+    expect(schedule).toHaveBeenCalledTimes(1);
+    expect(schedule).toHaveBeenCalledWith(expect.any(Function), 100);
+    expect(activateSection).toHaveBeenCalledTimes(1);
+  });
+
+  it('activates section immediately when editor tab is already active', () => {
+    const ensureEditor = vi.fn();
+    const activateSection = vi.fn();
+    const schedule = vi.fn((callback: () => void) => callback());
+
+    activateSidebarSection({
+      isEditorTabActive: true,
+      ensureEditorTabActive: ensureEditor,
+      activateSection,
+      schedule,
+    });
+
+    expect(ensureEditor).not.toHaveBeenCalled();
+    expect(schedule).toHaveBeenCalledWith(expect.any(Function), 0);
+    expect(activateSection).toHaveBeenCalledTimes(1);
+  });
+});