Studio: Avoid showing what's new modal in new empty screen

[gavande1]

Related issues

• Fixes STU-1066

Proposed Changes

• Do not display the "What's new" modal on the onboarding screen if no sites have been created.

Testing Instructions

• Checkout trunk branch
• Delete or move your existing appdata-v1.json. We need fresh installation for testing. It exists at ~/Library/Application Support/Studio
• Apply following patch to force showing the modal on empty screen.

diff --git a/src/modules/whats-new/hooks/use-last-seen-version.tsx b/src/modules/whats-new/hooks/use-last-seen-version.tsx
index e2bb55e4..24047caf 100644
--- a/src/modules/whats-new/hooks/use-last-seen-version.tsx
+++ b/src/modules/whats-new/hooks/use-last-seen-version.tsx
@@ -33,7 +33,7 @@ export function useLastSeenVersion(): UseLastSeenVersion {
 
        return {
                lastSeenVersion,
-               isNewVersion,
+               isNewVersion: true,
                updateLastSeenVersion,
        };
 }

• Run npm start
• You will be shown onboarding screen that will ask to login to WordPress.com account.
• Click on "Skip" button on right bottom
• You will see the "What's new" modal. Don't close it yet.
• Now checkout to this branch.
• Refresh the window, Assert that "What's new" modal is not shown.

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[github-actions]

📊 Performance Test Results

Comparing 4705c1b vs trunk

site-editor

Metric	trunk	4705c1b	Diff	Change
load	13918.00 ms	7147.00 ms	-6771.00 ms	🟢 -48.6%

site-startup

Metric	trunk	4705c1b	Diff	Change
siteCreation	24495.00 ms	19883.00 ms	-4612.00 ms	🟢 -18.8%
siteStartup	8046.00 ms	9049.00 ms	+1003.00 ms	🔴 12.5%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change