fix(frontend): improve UX for expired or duplicate password reset links

[Bentlybro]

Summary

Improves the user experience when a password reset link has expired or been used, replacing the confusing generic error with a clean, helpful message.

Will be set as a draft for now as i am waiting for a review from design.

Changes

• Added ExpiredLinkMessage component that displays a user-friendly error state
• Updated reset password page to detect expired/used links from both:
  • Supabase error format (error=access_denied&error_code=otp_expired&error_description=...)
  • Internal clean format (error=link_expired)
• Enhanced callback route to detect and map expired/invalid link errors
• Clear, actionable UI with:
  • Friendly error message explaining what happened
  • "Send Me a New Link" button to request a new reset email
  • Login link for users who already have access

Before

Users saw a confusing URL with error parameters and an unclear form:
http://localhost:3000/reset-password?error=access_denied&error_code=otp_expired&error_description=Email+link+is+invalid+or+has+expired

After

Users see a clean, helpful message explaining the issue and how to fix it.

Checklist 📋

For code changes:

• I have clearly listed my changes in the PR description
• I have made a test plan
• I have tested my changes according to the test plan:
  • Navigate to http://localhost:3000/reset-password?error=access_denied&error_code=otp_expired&error_description=Email+link+is+invalid+or+has+expired and Verify the ExpiredLinkMessage component appears with proper messaging
  • Click "Send Me a New Link" and verify the email form appears

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch bently/secrt-1369-improve-ux-for-expired-or-duplicate-password-reset-links

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[deepsource-io]

Here's the code health analysis summary for commits 9c3f679..47815a1. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗
Python	✅ Success		View Check ↗

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[github-actions]

This pull request has conflicts with the base branch, please resolve those so we can evaluate the pull request.