Complete light theme with comprehensive improvements

[Pierry]

Summary

This PR completes the transition from dark theme to light theme and syncs all the comprehensive improvements that were previously working on the gh-pages branch.

✨ Key Changes

• Light Theme Implementation: Full conversion from dark theme to light theme for better readability
• Projects Section Enhancement: Added proper project cards for "How Much I Run" iOS app and "SpaceMetrics.ai" platform
• Contact Form Integration: Added functional contact form with Formspree integration (https://formspree.io/f/xpwzkkld)
• Section Removal: Removed GitHub Activity and Current Focus sections as requested
• Styling Consistency: Updated footer and all components to match the new light theme

🎨 Theme Changes

• Background: bg-gradient-to-br from-slate-50 via-white to-gray-50 → bg-gradient-to-br from-slate-50 to-blue-50
• Navigation: Dark navigation converted to light with proper contrast
• Cards: Updated all card styling for light theme compatibility
• Footer: Updated from dark footer to light theme styling

📱 Projects Added

1. How Much I Run: iOS running app with Apple Health integration

   • App Store link: https://apps.apple.com/us/app/how-much-i-run/id6748591105
   • Custom icon with running person SVG
   • Proper badges: iOS App, Health & Fitness, Free

2. SpaceMetrics.ai: Engineering Productivity Analytics Platform

   • Website link: https://spacemetrics.ai
   • Custom analytics icon
   • Proper badges: Analytics, SaaS, Productivity

📧 Contact Form

• Formspree integration for reliable form submission
• Fields: Name, Email, Subject, Message
• Proper validation and styling
• Responsive design for mobile and desktop

🧹 Cleanup

• Removed unused ReadmeDisplay import reference
• Removed GitHub Activity section completely
• Removed Current Focus section completely
• Consistent color scheme throughout

Test Plan

• Verify light theme renders correctly across all sections
• Test Projects section displays both apps with correct links
• Ensure contact form submits properly to Formspree
• Confirm all removed sections are gone
• Check responsive design on mobile and desktop
• Validate all external links work correctly

🤖 Generated with Claude Code