Add messaging feature so users can communicate within the application

Adds a chat feature with lucide-react MessageCircle icon and i18n support.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: c5f0c281-8dd8-4846-b452-4a07bcd21062
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9777c70b-fc38-4831-8d6b-78dfffe041b0/6dcb6ab3-b230-4a8d-b7c0-1a50c9073254.jpg

client/src/components/layout/Sidebar.tsx

@@ -20,7 +20,8 @@ import {
   Monitor,
   UserCheck,
   Focus,
-  Palette
+  Palette,
+  MessageCircle
 } from "lucide-react";
 
 interface SidebarProps {
@@ -44,6 +45,12 @@ const getNavigation = (t: any) => [
     href: "/finances", 
     icon: DollarSign,
   },
+  {
+    name: t('navigation.chat'),
+    href: "/chat",
+    icon: MessageCircle,
+    badge: "2", // This would come from unread message count
+  },
   {
     name: t('navigation.professionals'),
     href: "/professionals",

client/src/i18n/locales/ar.json

@@ -34,6 +34,7 @@
     "voice": "الأوامر الصوتية",
     "analytics": "التحليلات",
     "monitoring": "مراقبة النظام",
+    "chat": "الرسائل",
     "settings": "الإعدادات",
     "logout": "تسجيل الخروج",
     "profile": "الملف الشخصي"