feat: Complete Z.CRM system with all 6 modules

✨ Features:
- Complete authentication system with JWT
- Dashboard with all 6 modules visible
- Contact Management module (Salesforce-style)
- CRM & Sales Pipeline module (Pipedrive-style)
- Inventory & Assets module (SAP-style)
- Tasks & Projects module (Jira/Asana-style)
- HR Management module (BambooHR-style)
- Marketing Management module (HubSpot-style)
- Admin Panel with user management and role matrix
- World-class UI/UX with RTL Arabic support
- Cairo font (headings) + Readex Pro font (body)
- Sample data for all modules
- Protected routes and authentication flow
- Backend API with Prisma + PostgreSQL
- Comprehensive documentation

🎨 Design:
- Color-coded modules
- Professional data tables
- Stats cards with metrics
- Progress bars and status badges
- Search and filters
- Responsive layout

📊 Tech Stack:
- Frontend: Next.js 14, TypeScript, Tailwind CSS
- Backend: Node.js, Express, Prisma
- Database: PostgreSQL
- Auth: JWT with bcrypt

🚀 Production-ready frontend with all features accessible

frontend/src/components/ProtectedRoute.tsx

@@ -0,0 +1,34 @@
+'use client'
+
+import { useEffect } from 'react'
+import { useRouter } from 'next/navigation'
+import { useAuth } from '@/contexts/AuthContext'
+
+export default function ProtectedRoute({ children }: { children: React.ReactNode }) {
+  const { isAuthenticated, isLoading } = useAuth()
+  const router = useRouter()
+
+  useEffect(() => {
+    if (!isLoading && !isAuthenticated) {
+      router.push('/')
+    }
+  }, [isAuthenticated, isLoading, router])
+
+  if (isLoading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center">
+        <div className="text-center">
+          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-primary-600 mx-auto"></div>
+          <p className="mt-4 text-gray-600">جاري التحميل...</p>
+        </div>
+      </div>
+    )
+  }
+
+  if (!isAuthenticated) {
+    return null
+  }
+
+  return <>{children}</>
+}
+