Add comprehensive UX enhancements with innovative features: 🔍 Fuzzy Search Component (SearchUnits.tsx): - Powered by Fuse.js for intelligent fuzzy matching - Searches across unit abbreviations, names, and categories - Real-time dropdown with results - Keyboard shortcut: Press "/" to focus search - Press Escape to close - Click outside to dismiss - Shows measure category with color dot - Top 10 results displayed - Smart weighting: abbr (2x), singular/plural (1.5x), measure (1x) 💾 Conversion History (ConversionHistory.tsx): - LocalStorage persistence (max 50 entries) - Auto-saves conversions as user types - Collapsible history panel - Click to restore previous conversion - Clear all with confirmation - Shows relative time (just now, 5m ago, etc.) - Live updates across tabs with storage events - Custom event dispatch for same-window updates 🌓 Dark Mode Support: - ThemeProvider with light/dark/system modes - Persistent theme preference in localStorage - Smooth theme transitions - ThemeToggle component with animated sun/moon icons - Gradient text adapts to theme - System preference detection ⭐ Favorites & Copy Features: - Star button to favorite units (localStorage) - Copy to clipboard with visual feedback - Hover to reveal action buttons - Check icon confirmation for 2 seconds - Yellow star fill for favorited units ⌨️ Keyboard Shortcuts: - "/" - Focus search input - "Escape" - Close search, blur inputs - More shortcuts ready to add (Tab, Ctrl+K, etc.) 📦 LocalStorage Utilities (lib/storage.ts): - saveToHistory() - Add conversion record - getHistory() - Retrieve history - clearHistory() - Clear all history - getFavorites() / addToFavorites() / removeFromFavorites() - toggleFavorite() - Toggle favorite status - Type-safe ConversionRecord interface - Automatic error handling 🎨 Enhanced MainConverter: - Integrated search at top - Conversion history at bottom - Copy & favorite buttons on each result card - Hover effects with opacity transitions - Auto-save to history on conversion - Click history item to restore conversion - Visual feedback for all interactions 📱 Updated Layout & Page: - ThemeProvider wraps entire app - suppressHydrationWarning for SSR - Top navigation bar with theme toggle - Keyboard hint for search - Dark mode gradient text variants Dependencies Added: - fuse.js 7.1.0 - Fuzzy search engine - lucide-react 0.553.0 - Icon library (Search, Copy, Star, Check, etc.) Features Now Working: ✅ Intelligent fuzzy search across 187 units ✅ Conversion history with persistence ✅ Dark mode with system detection ✅ Copy any result to clipboard ✅ Favorite units for quick access ✅ Keyboard shortcuts (/, Esc) ✅ Smooth animations and transitions ✅ Mobile-responsive design 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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