Add Custom 404 Page for Invalid Routes

[BHUVANSH855]

🚀 Feature Request

The project currently does not have a dedicated custom 404 page.

When users navigate to a non-existing route, they should see a properly designed error page instead of a blank screen or default browser message.

🎯 Proposed Changes

• Create a custom 404 page
• Add:
  • Friendly error message
  • "Go Back" button
  • "Return to Home" button
• Maintain consistent theme with rest of the website
• Ensure responsive design

✅ Benefits

• Improved user experience
• Professional routing behavior
• Prevents confusion for users

[github-actions]

Thanks for opening this issue 🎉, @BHUVANSH855!

We'll look into it as soon as possible, estimated time for response is 5–8 hrs.

Don't raise PR unless assigned to you.In the meantime, please ensure you've filled out all required details. If you have more information (logs, screenshots, reproduction steps), feel free to add them here.

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If your issue goes stale for more than one day, you can tag and comment on this same issue by tagging @singh-odyssey — singh-odyssey

[BHUVANSH855]

Hi @singh-odyssey,

Assign this to me under ECWoC'26.

[github-actions]

👤 Issue assigned to @BHUVANSH855.

[github-actions]

✅ This issue has been closed. Thank you for your contribution!