Fix test: wrap App in AlertProvider and update assertion

[devin-ai-integration]

Summary

The single unit test in App.test.jsx was broken due to two issues:

1. Missing context provider: App uses useAlert() which requires AlertProvider from AlertContext. The test rendered <App /> without this provider, causing a crash: Cannot destructure property 'showAlert' of '...' as it is undefined.
2. Stale assertion: The test asserted on "learn react" text (leftover Create React App boilerplate), which doesn't exist in the Wordle app. Updated to assert on "WORDLE", the actual title rendered by the Header component.

Review & Testing Checklist for Human

• Verify AlertProvider is the only missing context provider needed to render App (check index.js for other providers that may need to be included in the test wrapper)
• Run CI=true npm test locally to confirm the test passes

Notes

• The test scope is intentionally minimal (render check only), matching the original intent of the boilerplate test. More comprehensive game logic tests could be added separately.

Link to Devin session: https://app.devin.ai/sessions/82e464daf0d44d42b5cab5f9ddd1d030
Requested by: @matthewguerra-cog

---

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.