[AB-3423] Fix user authentication bug

[igzard]

Summary

This PR implements the changes requested in YouTrack ticket AB-3423.

Ticket Summary: Fix user authentication bug

Description

Fix user authentication bug

The login form is not validating email addresses properly. Users can submit invalid email formats and this causes errors in the backend.

Requirements:

• Add proper email validation to the frontend
• Ensure backend also validates email format
• Show user-friendly error messages
• Add tests for email validation

Generated Implementation

Mock AI Response for Testing

Task: Fix user authentication bug

Analysis: This is a mock response since Claude Code CLI is not available.
The task "Fix user authentication bug" has been received and would normally be processed by AI.

Implementation Plan:

1. Analyze the requirements: Fix user authentication bug

The login form is not validating email addresses properly. Users can submit invalid email formats and this causes errors in the backend.

Requirements:

• Add proper email validation to the frontend
• Ensure backend also validates email format
• Show user-friendly error messages
• Add tests for email validation

2. Generate appropriate code changes
3. Create necessary files and modifications
4. Apply best practices for the detected project type

Mock Code Changes:

• Files to be modified: (would be determined by AI analysis)
• Code snippets: (would be generated based on requirements)
• Tests: (would be created as needed)

Note: This is a mock response for testing purposes. In production, Claude Code CLI would provide actual AI-generated solutions.

Checklist

• Code has been tested
• Documentation has been updated if necessary
• All tests pass
• Code follows project style guidelines

---

This PR was automatically generated by Billy AI Dev Bot
YouTrack Ticket: AB-3423