docs: submit focus trap accessibility fix showcase

[WHENKEY2007]

Pull Request Description

Submits an interactive showcase and demo to resolve the escape-prone focus trap accessibility bug in modal.js.

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Type of Change

• ✨ New animation / hover effect
• 🧩 New component
• 📝 Documentation improvement
• 🐛 Bug fix in an existing submission
• Other (describe below)

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Submission Checklist

⚠️ PRs that fail this checklist will be closed without review.

• All changes are inside submissions/ (e.g., submissions/examples/your-feature-name/ or submissions/docs/your-feature-name/)
• Includes demo.html — self-contained, opens in browser with no server
• Includes style.css — raw CSS for the proposed feature
• Includes README.md — what it does, how to use it, why it fits EaseMotion CSS
• No changes to core/
• No changes to components/
• One feature per PR (no bundled unrelated changes)

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Feature Description

What does this add?
Showcase and interactive testing demo for fixing focus trap vulnerabilities in modal overlays.

How does a developer use it?

<!-- The interactive showcase is located under submissions/docs/fix-modal-focus-trap/ -->

[SAPTARSHI-coder]

✅ Submission Validation Passed!

Great job! All required files are present and valid.

📁 Folder: submissions/docs/fix-modal-focus-trap

Files found:

• ✅ demo.html
• ✅ style.css
• ✅ README.md

🚀 Next Steps:

• A maintainer will review your PR
• Respond to any feedback if requested
• Once approved, your contribution will be merged!

Thank you for contributing to EaseMotion CSS! 🎉

[SAPTARSHI-coder]

✅ Submission Validation Passed!

Great job! All required files are present and valid.

📁 Folder: submissions/docs/fix-modal-focus-trap

Files found:

• ✅ demo.html
• ✅ style.css
• ✅ README.md

🚀 Next Steps:

• A maintainer will review your PR
• Respond to any feedback if requested
• Once approved, your contribution will be merged!

Thank you for contributing to EaseMotion CSS! 🎉

[github-actions]

🎉 Congratulations on your PR merge, @WHENKEY2007! 🚀

Thank you so much for your valuable contribution to EaseMotion CSS! Your code is now merged into the main branch.

🎮 Join our Discord Server!
We have an official Discord server for EaseMotion CSS! Join us to connect with other developers, seek help, discuss design choices, and share your creations in the showcase channel: Join the EaseMotion CSS Discord 💜

Thank you again, and happy coding! 💻

[github-actions]

🎉 Pull Request Integrated!

Thank you for your contribution, @WHENKEY2007! Your changes have been successfully merged into main and will be credited to your wall. 🚀

📊 Daily Merge Progress: You have merged 11/150 PRs today. Daily quota resets in 4 hrs.

📢 GSSoC Leaderboard Status Update:
Please note that the GSSoC leaderboard servers are currently experiencing platform-wide downtime, so your points may take a few days to reflect. Rest assured, your merged PR is fully recorded in our repository history and all GSSoC labels are correctly assigned.

🎮 Join our Discord Server!
We have an official Discord server for EaseMotion CSS! Join us to connect with other developers, seek help, discuss design choices, and share your creations in the showcase channel: Join the EaseMotion CSS Discord 💜