app/layout.tsx

import type { Metadata } from 'next';
import { ThemeProvider } from '@/components/providers/ThemeProvider';
import './globals.css';

export const metadata: Metadata = {
  title: 'Unit Converter - Convert Any Unit Instantly',
  description: 'A spectacular, innovative unit conversion app supporting 23 measurement categories with 187 units. Real-time conversion with the best UX.',
};

export default function RootLayout({
  children,
}: Readonly<{
  children: React.ReactNode;
}>) {
  return (
    <html lang="en" suppressHydrationWarning>
      <head>
        <script
          dangerouslySetInnerHTML={{
            __html: `
              (function() {
                try {
                  const storageKey = 'units-ui-theme';
                  const stored = localStorage.getItem(storageKey);
                  const theme = stored || 'system';

                  if (theme === 'system') {
                    const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches
                      ? 'dark'
                      : 'light';
                    document.documentElement.classList.add(systemTheme);
                  } else {
                    document.documentElement.classList.add(theme);
                  }
                } catch (e) {}
              })();
            `,
          }}
        />
      </head>
      <body className="antialiased">
        <ThemeProvider defaultTheme="system" storageKey="units-ui-theme">
          {children}
        </ThemeProvider>
      </body>
    </html>
  );
}
feat: initialize Next.js 16 project with TypeScript and Tailwind CSS 4 Set up complete Next.js 16 development environment: - Next.js 16.0.1 with App Router and Turbopack - React 19.2.0 with TypeScript 5.9 - Tailwind CSS 4.1.17 with custom category colors - ESLint 9 with Next.js config - Static site generation enabled (output: 'export') Project structure: - app/ directory with layout, page, and globals.css - Tailwind config with 23 category-specific colors - TypeScript config with strict mode and path aliases - Complete .gitignore for Next.js projects Dependencies installed: - convert-units 2.3.4 for unit conversions - All React 19 and Next.js 16 dependencies - Development tooling (TypeScript, ESLint, Tailwind) Ready for Phase 2: Core conversion engine implementation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2025-11-08 09:21:56 +01:00			`import type { Metadata } from 'next';`
feat: implement Phase 3 - Advanced UX features and interactivity 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> 2025-11-08 10:14:03 +01:00			`import { ThemeProvider } from '@/components/providers/ThemeProvider';`
feat: initialize Next.js 16 project with TypeScript and Tailwind CSS 4 Set up complete Next.js 16 development environment: - Next.js 16.0.1 with App Router and Turbopack - React 19.2.0 with TypeScript 5.9 - Tailwind CSS 4.1.17 with custom category colors - ESLint 9 with Next.js config - Static site generation enabled (output: 'export') Project structure: - app/ directory with layout, page, and globals.css - Tailwind config with 23 category-specific colors - TypeScript config with strict mode and path aliases - Complete .gitignore for Next.js projects Dependencies installed: - convert-units 2.3.4 for unit conversions - All React 19 and Next.js 16 dependencies - Development tooling (TypeScript, ESLint, Tailwind) Ready for Phase 2: Core conversion engine implementation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2025-11-08 09:21:56 +01:00			`import './globals.css';`

			`export const metadata: Metadata = {`
			`title: 'Unit Converter - Convert Any Unit Instantly',`
			`description: 'A spectacular, innovative unit conversion app supporting 23 measurement categories with 187 units. Real-time conversion with the best UX.',`
			`};`

			`export default function RootLayout({`
			`children,`
			`}: Readonly<{`
			`children: React.ReactNode;`
			`}>) {`
			`return (`
feat: implement Phase 3 - Advanced UX features and interactivity 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> 2025-11-08 10:14:03 +01:00			`<html lang="en" suppressHydrationWarning>`
fix: prevent theme flicker on page load Add blocking script in HTML head to apply theme before React hydration. This eliminates the flash of wrong theme (FOUT) that occurred when the page loaded with default theme before useEffect could apply the saved theme. The script: - Runs synchronously before page render - Reads theme from localStorage - Applies dark/light class to <html> element immediately - Handles system theme preference detection - Wrapped in try-catch for safety This ensures users see the correct theme from the first paint, with no flicker. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2025-11-08 17:18:28 +01:00			`<head>`
			`<script`
			`dangerouslySetInnerHTML={{`
			__html: `
			`(function() {`
			`try {`
			`const storageKey = 'units-ui-theme';`
			`const stored = localStorage.getItem(storageKey);`
			`const theme = stored \|\| 'system';`

			`if (theme === 'system') {`
			`const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches`
			`? 'dark'`
			`: 'light';`
			`document.documentElement.classList.add(systemTheme);`
			`} else {`
			`document.documentElement.classList.add(theme);`
			`}`
			`} catch (e) {}`
			`})();`
			`,
			`}}`
			`/>`
			`</head>`
feat: initialize Next.js 16 project with TypeScript and Tailwind CSS 4 Set up complete Next.js 16 development environment: - Next.js 16.0.1 with App Router and Turbopack - React 19.2.0 with TypeScript 5.9 - Tailwind CSS 4.1.17 with custom category colors - ESLint 9 with Next.js config - Static site generation enabled (output: 'export') Project structure: - app/ directory with layout, page, and globals.css - Tailwind config with 23 category-specific colors - TypeScript config with strict mode and path aliases - Complete .gitignore for Next.js projects Dependencies installed: - convert-units 2.3.4 for unit conversions - All React 19 and Next.js 16 dependencies - Development tooling (TypeScript, ESLint, Tailwind) Ready for Phase 2: Core conversion engine implementation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2025-11-08 09:21:56 +01:00			`<body className="antialiased">`
feat: implement Phase 3 - Advanced UX features and interactivity 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> 2025-11-08 10:14:03 +01:00			`<ThemeProvider defaultTheme="system" storageKey="units-ui-theme">`
			`{children}`
			`</ThemeProvider>`
feat: initialize Next.js 16 project with TypeScript and Tailwind CSS 4 Set up complete Next.js 16 development environment: - Next.js 16.0.1 with App Router and Turbopack - React 19.2.0 with TypeScript 5.9 - Tailwind CSS 4.1.17 with custom category colors - ESLint 9 with Next.js config - Static site generation enabled (output: 'export') Project structure: - app/ directory with layout, page, and globals.css - Tailwind config with 23 category-specific colors - TypeScript config with strict mode and path aliases - Complete .gitignore for Next.js projects Dependencies installed: - convert-units 2.3.4 for unit conversions - All React 19 and Next.js 16 dependencies - Development tooling (TypeScript, ESLint, Tailwind) Ready for Phase 2: Core conversion engine implementation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2025-11-08 09:21:56 +01:00			`</body>`
			`</html>`
			`);`
			`}`