Fix canonical WordPress CalorieApp route

[xrpbanks]

Summary

• point the standalone CalorieApp launcher to the canonical WordPress page route
• align the frontend environment example
• add a regression test that rejects the non-canonical clean route

Reason

The site uses an /index.php/ permalink structure. The previous /calorieapp/ target returns 404, while WordPress page 7880 is prepared for /index.php/calorieapp/.

Rollback

Revert this pull request and redeploy the previous live commit 62ed99a.

[Copilot]

Pull request overview

This PR updates the standalone CalorieApp launcher to use the canonical WordPress permalink route (/index.php/calorieapp/) and adds a regression test to prevent reintroducing the non-canonical clean route (/calorieapp/) that returns 404 in the current WordPress configuration.

Changes:

• Updated the frontend launcher fallback URL to https://calorietoken.net/index.php/calorieapp/.
• Aligned frontend/.env.example to the canonical WordPress launcher URL.
• Added a backend pytest regression test ensuring the canonical URL is present (and the non-canonical URL is absent) in the relevant frontend sources.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
frontend/components/XamanLoginPanel.tsx	Updates the default WordPress launcher URL used when opening CalorieApp outside the embedded page.
frontend/.env.example	Updates the example env var to match the canonical WordPress route.
backend/tests/test_frontend_configuration.py	Adds a regression test guarding against reintroducing the non-canonical /calorieapp/ URL in frontend sources.

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