diff --git a/app/ai-assistant/page.tsx b/app/ai-assistant/page.tsx
index 6e8e80d5..53b90397 100644
--- a/app/ai-assistant/page.tsx
+++ b/app/ai-assistant/page.tsx
@@ -1,13 +1,24 @@
-export default function AIAssistantPage() {
+import { getServerSession } from "next-auth/next";
+import { authOptions } from "@/app/api/auth/[...nextauth]/route";
+import { redirect } from "next/navigation";
+import { ResponsiveIframe } from "@/app/components/responsive-iframe";
+
+export default async function Page() {
+  const session = await getServerSession(authOptions);
+
+  if (!session) {
+    redirect("/signin");
+  }
+
   return (
-    <div className="w-full h-[calc(100vh-8rem)]">
-      <iframe 
-        src="https://example.com/ai-assistant"
-        className="w-full h-full border-none"
-        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
-        allowFullScreen
-      />
-    </div>
-  )
+    <main className="w-full h-screen bg-black">
+      <div className="w-full h-full px-4 pt-12 pb-4">
+        <ResponsiveIframe 
+          src={process.env.NEXT_PUBLIC_IFRAME_AI_ASSISTANT_URL || ''}
+          allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+        />
+      </div>
+    </main>
+  );
 }
 
diff --git a/app/conference/page.tsx b/app/conference/page.tsx
index 80131267..beed9827 100644
--- a/app/conference/page.tsx
+++ b/app/conference/page.tsx
@@ -1,7 +1,7 @@
 import { getServerSession } from "next-auth/next";
 import { authOptions } from "@/app/api/auth/[...nextauth]/route";
 import { redirect } from "next/navigation";
-import { ConferenceFrame } from "@/components/conference/conference-frame";
+import { ResponsiveIframe } from "@/app/components/responsive-iframe";
 
 export default async function Page() {
   const session = await getServerSession(authOptions);
@@ -10,5 +10,14 @@ export default async function Page() {
     redirect("/signin");
   }
 
-  return <ConferenceFrame />;
+  return (
+    <main className="w-full h-screen bg-black">
+      <div className="w-full h-full px-4 pt-12 pb-4">
+        <ResponsiveIframe 
+          src={process.env.NEXT_PUBLIC_IFRAME_CONFERENCE_URL || ''}
+          allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+        />
+      </div>
+    </main>
+  );
 } 
\ No newline at end of file
diff --git a/app/page.tsx b/app/page.tsx
index 60de4830..5a753fc9 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -1,5 +1,4 @@
 import { QuoteCard } from "@/components/quote-card";
-import { Messages } from "@/components/messages";
 import { Podcast } from "@/components/podcast";
 import { CalendarWidget } from "@/components/calendar-widget";
 import { News } from "@/components/news";
@@ -13,16 +12,13 @@ export default function DashboardPage() {
   return (
     <div className="w-full px-4 pt-12 pb-4">
       <div className='grid grid-cols-12 gap-4'>
-        <div className='col-span-3'>
+        <div className='col-span-4'>
           <QuoteCard />
           <div className='mt-4'>
             <News />
           </div>
         </div>
-        <div className='col-span-6'>
-          <Messages />
-        </div>
-        <div className='col-span-3 space-y-4'>
+        <div className='col-span-8 space-y-4'>
           <Podcast />
           <CalendarWidget />
           <Todo />
diff --git a/app/radio/page.tsx b/app/radio/page.tsx
index ac8e80ad..782db942 100644
--- a/app/radio/page.tsx
+++ b/app/radio/page.tsx
@@ -1,7 +1,7 @@
 import { getServerSession } from "next-auth/next";
 import { authOptions } from "@/app/api/auth/[...nextauth]/route";
 import { redirect } from "next/navigation";
-import { RadioFrame } from "@/components/radio/radio-frame";
+import { ResponsiveIframe } from "@/app/components/responsive-iframe";
 
 export default async function Page() {
   const session = await getServerSession(authOptions);
@@ -10,5 +10,14 @@ export default async function Page() {
     redirect("/signin");
   }
 
-  return <RadioFrame />;
+  return (
+    <main className="w-full h-screen bg-black">
+      <div className="w-full h-full px-4 pt-12 pb-4">
+        <ResponsiveIframe 
+          src={process.env.NEXT_PUBLIC_IFRAME_RADIO_URL || ''}
+          allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+        />
+      </div>
+    </main>
+  );
 } 
\ No newline at end of file
diff --git a/components/main-nav.tsx b/components/main-nav.tsx
index b28b8776..fb438c4c 100644
--- a/components/main-nav.tsx
+++ b/components/main-nav.tsx
@@ -166,37 +166,62 @@ export function MainNav() {
   // Base menu items (available for everyone)
   const baseMenuItems = [
     {
-      title: "HealthView",
-      icon: Heart,
-      href: '/health-view',
+      title: "TimeTracker",
+      icon: Clock,
+      href: '/timetracker',
     },
     {
-      title: "MissionView",
-      icon: Target,
-      href: '/mission-view',
+      title: "Calendar",
+      icon: Calendar,
+      href: '/calendar',
+    },
+    {
+      title: "Notes",
+      icon: PenLine,
+      href: '/notes',
+    },
+    {
+      title: "AI Assistant",
+      icon: Robot,
+      href: '/ai-assistant',
+    },
+    {
+      title: "Conference",
+      icon: Video,
+      href: '/conference',
+    },
+    {
+      title: "Radio",
+      icon: RadioIcon,
+      href: '/radio',
+    },
+    {
+      title: "Observatory",
+      icon: Telescope,
+      href: '/observatory',
     },
   ];
 
   // Role-specific menu items
   const roleSpecificItems = [
     {
-      title: "ShowCase",
+      title: "Announcement",
+      icon: Megaphone,
+      href: '/announcement',
+      requiredRoles: ["Admin", "Entrepreneurship", "Expression"],
+    },
+    {
+      title: "Artlab",
       icon: Lightbulb,
-      href: '/showcase',
+      href: '/design',
       requiredRoles: ["Expression"],
     },
     {
-      title: "UsersView",
+      title: "Management",
       icon: UserCog,
       href: '/management',
       requiredRoles: ["Admin", "Entrepreneurship"],
     },
-    {
-      title: "TheMessage",
-      icon: Mail,
-      href: '/the-message',
-      requiredRoles: ["Mediation", "Expression"],
-    },
   ];
 
   // Get visible menu items based on user roles
@@ -262,10 +287,12 @@ export function MainNav() {
               <RadioIcon className='w-5 h-5' />
               <span className="sr-only">Radio</span>
             </Link>
-            <Link href='/announcement' className='text-white/80 hover:text-white'>
-              <Megaphone className='w-5 h-5' />
-              <span className="sr-only">Announcement</span>
-            </Link>
+            {hasRole(["Admin", "Entrepreneurship", "Expression"]) && (
+              <Link href='/announcement' className='text-white/80 hover:text-white'>
+                <Megaphone className='w-5 h-5' />
+                <span className="sr-only">Announcement</span>
+              </Link>
+            )}
           </div>
 
           {/* Right side */}
diff --git a/components/messages.tsx b/components/messages.tsx
deleted file mode 100644
index 52b68d59..00000000
--- a/components/messages.tsx
+++ /dev/null
@@ -1,14 +0,0 @@
-import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
-
-export function Messages() {
-  return (
-    <Card className='transition-transform duration-500 ease-in-out transform hover:scale-105'>
-      <CardHeader>
-        <CardTitle>Messages - Non Lu</CardTitle>
-      </CardHeader>
-      <CardContent className='p-6 text-center text-gray-500'>
-        Aucun nouveau messages
-      </CardContent>
-    </Card>
-  );
-}
diff --git a/components/sidebar.tsx b/components/sidebar.tsx
index df7c09b5..59a18227 100644
--- a/components/sidebar.tsx
+++ b/components/sidebar.tsx
@@ -5,23 +5,20 @@ import { useState } from "react";
 
 import { cn } from "@/lib/utils";
 import {
-  BookOpen,
-  Share2,
-  Palette,
-  GitFork,
-  Building2,
+  Clock,
   Calendar,
-  Target,
-  Mail,
-  HardDrive,
-  GraduationCap,
-  MessageSquare,
   FileText,
-  Calculator,
-  Users,
-  Kanban,
+  Bot,
+  Video,
+  Radio,
+  Eye,
+  Bell,
   ChevronLeft,
   ChevronRight,
+  Palette,
+  GitFork,
+  Calculator,
+  Building2,
 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { ScrollArea } from "@/components/ui/scroll-area";
@@ -65,13 +62,22 @@ export function Sidebar({ isOpen, onClose }: SidebarProps) {
     });
   };
 
+  const handleNavigation = (href: string, external?: boolean) => {
+    if (external && href) {
+      window.open(href, "_blank");
+    } else {
+      router.push(href);
+    }
+    onClose();
+  };
+
   // Base menu items (available for everyone)
   const baseMenuItems: MenuItem[] = [
     {
-      title: "Diary",
-      icon: BookOpen,
-      href: "/diary",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_DIARY_URL,
+      title: "TimeTracker",
+      icon: Clock,
+      href: "/timetracker",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_TIMETRACKER_URL || '',
     },
     {
       title: "Calendar",
@@ -80,52 +86,40 @@ export function Sidebar({ isOpen, onClose }: SidebarProps) {
       external: false,
     },
     {
-      title: "Email",
-      icon: Mail,
-      href: "/email",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_MAIL_URL,
-    },
-    {
-      title: "Drive",
-      icon: HardDrive,
-      href: "/drive",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_DRIVE_URL,
-    },
-    {
-      title: "Contacts",
-      icon: Users,
-      href: "/contacts",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_CONTACTS_URL,
-    },
-    {
-      title: "Learn",
-      icon: GraduationCap,
-      href: "/learn",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_LEARN_URL,
-    },
-    {
-      title: "Parole",
-      icon: MessageSquare,
-      href: "/parole",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_PAROLE_URL,
-    },
-    {
-      title: "MissionsBoard",
-      icon: Kanban,
-      href: "/missions-board",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_MISSIONSBOARD_URL,
-    },
-    {
-      title: "Chapter",
+      title: "Notes",
       icon: FileText,
-      href: "/chapter",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_CHAPTER_URL,
+      href: "/notes",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_NOTES_URL || '',
     },
     {
-      title: "Agility",
-      icon: Share2,
-      href: "/flow",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_AGILITY_URL,
+      title: "AI Assistant",
+      icon: Bot,
+      href: "/ai-assistant",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_AI_ASSISTANT_URL || '',
+    },
+    {
+      title: "Conference",
+      icon: Video,
+      href: "/conference",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_CONFERENCE_URL || '',
+    },
+    {
+      title: "Radio",
+      icon: Radio,
+      href: "/radio",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_RADIO_URL || '',
+    },
+    {
+      title: "Observatory",
+      icon: Eye,
+      href: "/observatory",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_OBSERVATORY_URL || '',
+    },
+    {
+      title: "Announcement",
+      icon: Bell,
+      href: "/announcement",
+      iframe: process.env.NEXT_PUBLIC_IFRAME_ANNOUNCEMENT_URL || '',
     },
   ];
 
@@ -135,28 +129,28 @@ export function Sidebar({ isOpen, onClose }: SidebarProps) {
       title: "Artlab",
       icon: Palette,
       href: "/design",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_ARTLAB_URL,
+      iframe: process.env.NEXT_PUBLIC_IFRAME_ARTLAB_URL || '',
       requiredRole: "Expression",
     },
     {
       title: "Gite",
       icon: GitFork,
       href: "/gite",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_GITE_URL,
+      iframe: process.env.NEXT_PUBLIC_IFRAME_GITE_URL || '',
       requiredRole: "Coding",
     },
     {
       title: "Calculation",
       icon: Calculator,
       href: "/calculation",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_CALCULATION_URL,
+      iframe: process.env.NEXT_PUBLIC_IFRAME_CALCULATION_URL || '',
       requiredRole: "DataIntelligence",
     },
     {
       title: "Mediations",
       icon: Building2,
       href: "/crm",
-      iframe: process.env.NEXT_PUBLIC_IFRAME_MEDIATIONS_URL,
+      iframe: process.env.NEXT_PUBLIC_IFRAME_MEDIATIONS_URL || '',
       requiredRole: "Mediation",
     },
   ];
@@ -167,15 +161,6 @@ export function Sidebar({ isOpen, onClose }: SidebarProps) {
     ...roleSpecificItems.filter(item => hasRole(item.requiredRole))
   ];
 
-  const handleNavigation = (href: string, external?: boolean) => {
-    if (external && href) {
-      window.open(href, "_blank");
-    } else {
-      router.push(href);
-    }
-    onClose();
-  };
-
   return (
     <>
       {/* Backdrop */}