Initial commit: Coastal Timesheet App with comprehensive features

- Employee name validation for all submissions
- Complete entry validation (all fields required when any field has input)
- Dynamic auto-resizing work description fields
- Optimized field layout (Homeowner → Hours → Work Description)
- Professional PDF generation with validation
- Email/share functionality with validation
- Data import/export capabilities
- Dark/light theme support
- Mobile-responsive design
- Local data persistence
- Multiple entries per day support
- Custom homeowner management
- Comprehensive README with deployment instructions
- Production build ready for web hosting

src/components/ThemeToggle.jsx

@@ -0,0 +1,19 @@
+import { Sun, Moon } from 'lucide-react';
+
+const ThemeToggle = ({ isDark, toggleTheme }) => {
+  return (
+    <button
+      onClick={toggleTheme}
+      className="p-2 rounded-lg bg-gray-200 dark:bg-gray-700 hover:bg-gray-300 dark:hover:bg-gray-600 transition-colors"
+      aria-label="Toggle theme"
+    >
+      {isDark ? (
+        <Sun className="h-5 w-5 text-yellow-500" />
+      ) : (
+        <Moon className="h-5 w-5 text-gray-700" />
+      )}
+    </button>
+  );
+};
+
+export default ThemeToggle;