fix(ui): address PR review comments and fix E2E tests for unified sidebar

- Add try/catch for getElectronAPI() in sidebar-footer with window.open fallback
- Use formatShortcut() for OS-aware hotkey display in sidebar-header
- Remove unnecessary optional chaining on project.icon
- Remove redundant ternary in sidebar-navigation className
- Update E2E tests to use new project-dropdown-trigger data-testid

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/tests/features/feature-manual-review-flow.spec.ts

@@ -21,7 +21,6 @@ import {
   getKanbanColumn,
   authenticateForTests,
   handleLoginScreenIfPresent,
-  sanitizeForTestId,
 } from '../utils';
 
 const TEST_TEMP_DIR = createTempDirPath('manual-review-test');
@@ -131,10 +130,10 @@ test.describe('Feature Manual Review Flow', () => {
       await page.waitForTimeout(300);
     }
 
-    // Verify we're on the correct project (project switcher button shows project name)
-    // Use ends-with selector since data-testid format is: project-switcher-{id}-{sanitizedName}
-    const sanitizedProjectName = sanitizeForTestId(projectName);
-    await expect(page.locator(`[data-testid$="-${sanitizedProjectName}"]`)).toBeVisible({
+    // Verify we're on the correct project (project dropdown trigger shows project name)
+    await expect(
+      page.locator('[data-testid="project-dropdown-trigger"]').getByText(projectName)
+    ).toBeVisible({
       timeout: 10000,
     });