Problem

Currently, the application does not validate the GitHub repository URL before triggering the SDG analysis.

This leads to:

• Empty submissions being processed
• Invalid GitHub URLs triggering unnecessary API calls
• Poor user experience due to unclear errors

Expected Behavior

• Input should be validated before making API requests
• Invalid or empty inputs should be blocked
• Clear error messages should be shown to the user

Proposed Solution

• Add frontend validation for GitHub URL format
• Prevent empty submissions
• Add backend validation as a fallback
• Display user-friendly error messages

Impact

• Improves reliability
• Reduces unnecessary API calls
• Enhances user experience

Additional Context

I would like to work on this issue and submit a PR.