Add integration test for 404 page rendering on unknown routes

[Chucks1093]

Summary

The NotFoundPage component is registered for all unmatched routes but has no test confirming it actually renders when a user navigates to a path that does not exist.

Scope

• Navigate to a non-existent path in the test renderer
• Assert the NotFoundPage content is rendered
• Assert the page title or heading contains a 404 or not found message

Acceptance Criteria

• Unknown route renders NotFoundPage
• Page contains a recognizable not-found message

ETA: 12 hours

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Coordinate on Telegram

[Benedict315]

@Benedict315 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello please assign

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Benedict315 to this issue.

[Talentgift24-ux]

@Talentgift24-ux has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

i would love tto work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Talentgift24-ux to this issue.

[drips-wave]

Congratulations, @Benedict315! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Benedict315: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@Benedict315's PR #514 was approved and merged by @Chucks1093.

🏆 @Benedict315: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (293 total points). Track your full progress on GrantFox.

👏 Great work, @Benedict315! Keep contributing to accesslayerorg.

[drips-wave]

This issue has been completed by @Benedict315 as part of the Stellar Wave Program's 6th Wave 🥳

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