Add comprehensive user profile functionality with editing capabilities

[Copilot]

This PR implements a complete user profile system for CodeIQ.ai, providing users with a comprehensive view of their coding progress and account management capabilities.

Features Added

🎨 Modern Profile Interface

• Clean, responsive design matching existing UI patterns
• User avatar with fallback to user initials
• Profile information display (name, email, join date)
• Statistics cards showing total score, quizzes completed, and badges earned

✏️ Profile Editing

• Modal-based editing interface with real-time form validation
• Form validation for name and email fields
• Real-time updates with success/error messaging
• Seamless integration with existing user data storage

🏆 Achievement Display

• Badges section with visual icons and descriptions
• Badge categorization by programming language/topic
• Performance percentage and level indicators (Bronze, Silver, Gold)
• Quiz history with detailed results and timestamps

🔐 Security & Authentication

• Proper authentication checks with graceful redirect
• Non-authenticated users see "Access Denied" with sign-in prompt
• Sign-out functionality redirects to sign-in page
• Secure profile updates with validation

Technical Implementation

• Frontend: HTML5, CSS3 with Tailwind CSS
• JavaScript: ES6 modules with proper import/export
• Data Storage: localStorage integration with existing user system
• Architecture: Component-based structure following existing patterns

Files Added

• pages/profile.html - Complete profile page with responsive design
• assets/js/profile.js - Profile functionality with editing capabilities

Screenshots

Before: Homepage with logged-in user navigation

After: Complete profile page with all features

Testing Completed

✅ User authentication verification
✅ Profile data display and formatting
✅ Edit profile functionality with form validation
✅ Navigation integration (header dropdown, main content links)
✅ Badge and quiz history display with proper categorization
✅ Responsive design verification
✅ Security testing: Access control for unauthenticated users
✅ Sign-out functionality: Proper session termination
✅ Data persistence: Profile updates save correctly
✅ Error handling: Graceful degradation for all edge cases

The profile functionality is production-ready and provides users with complete account management capabilities while maintaining security and a consistent user experience.

Fixes #15.

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Name	Status	Preview	Comments	Updated (UTC)
codeiq-ai	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 24, 2025 8:14pm