fix: make public profile lookup case-insensitive

[sanzzzz-g]

Summary

Fixes the issue where public profile URLs returned a 404 when usernames contained uppercase characters.

Closes #933

Type of Change

• Bug fix
• New feature
• Documentation update
• Refactor / code cleanup

Changes Made

• Replaced case-sensitive .eq("github_login", username) queries with .ilike(...)
• Added canonical lowercase redirect for public profile URLs
• Prevented 404 errors for usernames with uppercase characters
• Improved URL consistency and canonical routing behavior

How to Test

Steps for the reviewer to verify this works:

1. Run the application locally
2. Navigate to a public profile URL using uppercase characters
3. Example: /u/PriyanshU
4. Verify the profile loads successfully instead of returning 404
5. Verify the URL redirects to the lowercase canonical version

Screenshots (if UI change)

N/A

Checklist

• Linked issue in summary
• npm run lint passes locally
• No TypeScript errors (npm run type-check)
• Self-reviewed the diff
• Added/updated tests if applicable

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[sanzzzz-g]

Hey @Priyanshu-byte-coder Implemented the fix for case-insensitive public profile routing.

Changes made

• Replaced case-sensitive .eq("github_login", username) queries with .ilike(...)
• Added canonical lowercase redirect handling
• Prevented 404 errors for usernames containing uppercase characters

PR submitted for review. Thanks!

[sanzzzz-g]

Hey @Priyanshu-byte-coder Implemented the fix for case-insensitive public profile routing.

Changes made

• Replaced case-sensitive .eq("github_login", username) queries with .ilike(...)
• Added canonical lowercase redirect handling
• Prevented 404 errors for usernames containing uppercase characters

PR submitted for review. Thanks!

[github-actions]

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