refactor: complete website optimization - unified navigation, colors, and structure

- Created service detail pages with storytelling style
- Created service list page
- Removed service modal interactions
- Simplified homepage About section
- Added homepage Cases section
- Updated navigation to use page links instead of anchors
- Created products list page
- Updated footer links
- Unified color scheme to brand red (#C41E3A)
- Fixed TypeScript errors (removed unused imports)
- Fixed JSX syntax errors
- Split About page into server and client components
- All tests passing: typecheck and build successful

src/components/layout/header.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useState, useEffect, useCallback, useRef } from 'react';
+import { useState, useEffect, useCallback } from 'react';
 import Link from 'next/link';
 import { usePathname } from 'next/navigation';
 import { Menu, X } from 'lucide-react';