diff --git a/app/analytics/page.tsx b/app/analytics/page.tsx
index a92dfde..ec75cf0 100644
--- a/app/analytics/page.tsx
+++ b/app/analytics/page.tsx
@@ -2,6 +2,7 @@ import { Suspense } from "react";
 import { Card, CardContent } from "@/components/ui/card";
 import { UsageAnalytics } from "@/components/dashboard/usage-analytics";
 import { RecentTransactions } from "@/components/dashboard/recent-transactions";
+
 import { BarChart3 } from "lucide-react";
 
 function AnalyticsSkeleton() {
@@ -39,7 +40,7 @@ export default function AnalyticsPage() {
         <div className="space-y-6">
           {/* Analytics des utilisateurs */}
           <UsageAnalytics />
-          
+
           {/* Transactions récentes - toute la largeur */}
           <RecentTransactions />
         </div>
diff --git a/app/api/add-credits/route.ts b/app/api/add-credits/route.ts
new file mode 100644
index 0000000..483c8c9
--- /dev/null
+++ b/app/api/add-credits/route.ts
@@ -0,0 +1,124 @@
+import { NextResponse } from "next/server";
+import { getDatabase } from "@/lib/db/mongodb";
+
+export async function POST() {
+  try {
+    const db = await getDatabase();
+    const CREDITS_TO_ADD = 5000000; // 5 millions de tokens
+
+    console.log(`🚀 DÉBUT: Ajout de ${CREDITS_TO_ADD.toLocaleString()} crédits à tous les utilisateurs`);
+
+    // Récupérer tous les utilisateurs existants
+    const users = await db.collection("users").find({}).toArray();
+    console.log(`👥 Utilisateurs trouvés: ${users.length}`);
+
+    if (users.length === 0) {
+      return NextResponse.json({
+        success: false,
+        message: "Aucun utilisateur trouvé"
+      });
+    }
+
+    // Récupérer toutes les balances existantes
+    const existingBalances = await db.collection("balances").find({}).toArray();
+    const existingBalanceUserIds = new Set(
+      existingBalances.map(balance => balance.user.toString())
+    );
+
+    console.log(`💰 Balances existantes: ${existingBalances.length}`);
+
+    let updatedCount = 0;
+    let createdCount = 0;
+    let totalCreditsAdded = 0;
+
+    // Pour chaque utilisateur
+    for (const user of users) {
+      const userId = user._id;
+      
+      if (existingBalanceUserIds.has(userId.toString())) {
+        // Utilisateur a déjà une balance - ajouter les crédits
+        const updateResult = await db.collection("balances").updateOne(
+          { user: userId },
+          { 
+            $inc: { tokenCredits: CREDITS_TO_ADD },
+            $set: { lastRefill: new Date() }
+          }
+        );
+        
+        if (updateResult.modifiedCount > 0) {
+          updatedCount++;
+          totalCreditsAdded += CREDITS_TO_ADD;
+          console.log(`✅ Crédits ajoutés pour l'utilisateur: ${user.email || user.name}`);
+        }
+      } else {
+        // Utilisateur n'a pas de balance - créer une nouvelle balance
+        const newBalance = {
+          user: userId,
+          tokenCredits: CREDITS_TO_ADD,
+          autoRefillEnabled: false,
+          lastRefill: new Date(),
+          refillAmount: 0,
+          refillIntervalUnit: "month",
+          refillIntervalValue: 1,
+          __v: 0
+        };
+
+        await db.collection("balances").insertOne(newBalance);
+        createdCount++;
+        totalCreditsAdded += CREDITS_TO_ADD;
+        console.log(`🆕 Nouvelle balance créée pour: ${user.email || user.name}`);
+      }
+    }
+
+    console.log(`✅ TERMINÉ:`);
+    console.log(`- Balances mises à jour: ${updatedCount}`);
+    console.log(`- Nouvelles balances créées: ${createdCount}`);
+    console.log(`- Total crédits ajoutés: ${totalCreditsAdded.toLocaleString()}`);
+
+    return NextResponse.json({
+      success: true,
+      statistics: {
+        totalUsers: users.length,
+        updatedBalances: updatedCount,
+        createdBalances: createdCount,
+        creditsPerUser: CREDITS_TO_ADD,
+        totalCreditsAdded
+      },
+      message: `${CREDITS_TO_ADD.toLocaleString()} crédits ajoutés à ${users.length} utilisateurs (${updatedCount} mis à jour, ${createdCount} créés)`
+    });
+
+  } catch (error) {
+    console.error("Erreur lors de l'ajout des crédits:", error);
+    return NextResponse.json({ 
+      success: false,
+      error: "Erreur serveur lors de l'ajout des crédits" 
+    }, { status: 500 });
+  }
+}
+
+// Endpoint pour vérifier les crédits actuels
+export async function GET() {
+  try {
+    const db = await getDatabase();
+
+    const users = await db.collection("users").find({}).toArray();
+    const balances = await db.collection("balances").find({}).toArray();
+
+    const totalCredits = balances.reduce((sum, balance) => sum + (balance.tokenCredits || 0), 0);
+    const averageCredits = balances.length > 0 ? totalCredits / balances.length : 0;
+
+    return NextResponse.json({
+      statistics: {
+        totalUsers: users.length,
+        totalBalances: balances.length,
+        totalCredits,
+        averageCredits: Math.round(averageCredits),
+        usersWithoutBalance: users.length - balances.length
+      }
+    });
+
+  } catch (error) {
+    console.error("Erreur lors de la récupération des statistiques:", error);
+    return NextResponse.json({ error: "Erreur serveur" }, { status: 500 });
+  }
+}
\ No newline at end of file
diff --git a/app/api/cleanup/balances/route.ts b/app/api/cleanup/balances/route.ts
new file mode 100644
index 0000000..47155b0
--- /dev/null
+++ b/app/api/cleanup/balances/route.ts
@@ -0,0 +1,104 @@
+import { NextResponse } from "next/server";
+import { getDatabase } from "@/lib/db/mongodb";
+
+export async function POST() {
+  try {
+    const db = await getDatabase();
+
+    // Récupérer tous les utilisateurs existants
+    const users = await db.collection("users").find({}).toArray();
+    const userIds = new Set(users.map(user => user._id.toString()));
+
+    // Récupérer toutes les balances
+    const balances = await db.collection("balances").find({}).toArray();
+
+    // Identifier les balances fantômes
+    const phantomBalances = balances.filter(balance => 
+      !userIds.has(balance.user.toString())
+    );
+
+    // Calculer les statistiques avant nettoyage
+    const totalBalances = balances.length;
+    const phantomCount = phantomBalances.length;
+    const phantomCredits = phantomBalances.reduce(
+      (sum, balance) => sum + (balance.tokenCredits || 0), 
+      0
+    );
+
+    console.log(`🗑️ SUPPRESSION: ${phantomCount} balances fantômes détectées`);
+    console.log(`💰 CRÉDITS FANTÔMES: ${phantomCredits}`);
+
+    // SUPPRESSION DÉFINITIVE des balances fantômes
+    const deleteResult = await db.collection("balances").deleteMany({
+      user: { $nin: Array.from(userIds) }
+    });
+
+    console.log(`✅ SUPPRIMÉES: ${deleteResult.deletedCount} balances`);
+
+    return NextResponse.json({
+      success: true,
+      statistics: {
+        totalBalances,
+        phantomCount,
+        phantomCredits,
+        cleanedCount: deleteResult.deletedCount
+      },
+      message: `${deleteResult.deletedCount} balances fantômes supprimées définitivement`
+    });
+
+  } catch (error) {
+    console.error("Erreur lors du nettoyage des balances:", error);
+    return NextResponse.json({ error: "Erreur serveur" }, { status: 500 });
+  }
+}
+
+// Endpoint pour analyser sans nettoyer
+export async function GET() {
+  try {
+    const db = await getDatabase();
+
+    const users = await db.collection("users").find({}).toArray();
+    const userIds = new Set(users.map(user => user._id.toString()));
+
+    const balances = await db.collection("balances").find({}).toArray();
+
+    const phantomBalances = balances.filter(balance => 
+      !userIds.has(balance.user.toString())
+    );
+
+    const phantomCredits = phantomBalances.reduce(
+      (sum, balance) => sum + (balance.tokenCredits || 0), 
+      0
+    );
+
+    // Analyser les doublons aussi
+    const userCounts = new Map<string, number>();
+    balances.forEach(balance => {
+      const userId = balance.user.toString();
+      userCounts.set(userId, (userCounts.get(userId) || 0) + 1);
+    });
+
+    const duplicates = Array.from(userCounts.entries())
+      .filter(([, count]) => count > 1)
+      .map(([userId, count]) => ({
+        userId,
+        count,
+        isPhantom: !userIds.has(userId)
+      }));
+
+    return NextResponse.json({
+      analysis: {
+        totalBalances: balances.length,
+        totalUsers: users.length,
+        phantomBalances: phantomBalances.length,
+        phantomCredits,
+        duplicateUsers: duplicates.length,
+        duplicates: duplicates.slice(0, 10) // Premiers 10 exemples
+      }
+    });
+
+  } catch (error) {
+    console.error("Erreur lors de l'analyse des balances:", error);
+    return NextResponse.json({ error: "Erreur serveur" }, { status: 500 });
+  }
+}
\ No newline at end of file
diff --git a/app/api/metrics/route.ts b/app/api/metrics/route.ts
index 3fbe1a7..115c7d8 100644
--- a/app/api/metrics/route.ts
+++ b/app/api/metrics/route.ts
@@ -13,21 +13,21 @@ export async function GET() {
       db.collection("balances").find({}).toArray(),
     ]);
 
-    // Calculer les utilisateurs actifs (dernière semaine)
-    const oneWeekAgo = new Date();
-    oneWeekAgo.setDate(oneWeekAgo.getDate() - 7);
+    // Calculer les utilisateurs actifs (30 derniers jours)
+    const thirtyDaysAgo = new Date();
+    thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);
     const activeUsers = users.filter((user) => {
       const lastActivity = new Date(user.updatedAt || user.createdAt);
-      return lastActivity >= oneWeekAgo;
+      return lastActivity >= thirtyDaysAgo;
     }).length;
 
     // Calculer les administrateurs
     const totalAdmins = users.filter(user => user.role === 'ADMIN').length;
 
-    // Calculer les conversations actives (dernière semaine)
+    // Calculer les conversations actives (30 derniers jours)
     const activeConversations = conversations.filter((conv) => {
       const lastActivity = new Date(conv.updatedAt || conv.createdAt);
-      return lastActivity >= oneWeekAgo;
+      return lastActivity >= thirtyDaysAgo;
     }).length;
 
     // Calculer le total des messages
@@ -41,32 +41,27 @@ export async function GET() {
       return sum + Math.abs(Number(transaction.rawAmount) || 0);
     }, 0);
 
-    // Calculer le total des crédits depuis balances
-    const totalCredits = balances.reduce((sum, balance) => {
-      return sum + (Number(balance.tokenCredits) || 0);
-    }, 0);
+    // Calculer le total des crédits
+    const totalCreditsUsed = balances.reduce(
+      (sum, balance) => sum + (balance.tokenCredits || 0),
+      0
+    );
 
     // Récupérer les transactions récentes (dernières 10)
     const recentTransactions = transactions
       .sort((a, b) => new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime())
-      .slice(0, 10)
-      .map(transaction => ({
-        _id: transaction._id,
-        description: `Transaction ${transaction.tokenType} - ${transaction.model}`,
-        amount: transaction.rawAmount,
-        type: transaction.rawAmount > 0 ? 'credit' : 'debit',
-        createdAt: transaction.createdAt
-      }));
+      .slice(0, 10);
 
     return NextResponse.json({
       totalUsers: users.length,
       activeUsers,
       totalAdmins,
-      totalCredits,
+      totalCredits: totalCreditsUsed,
       activeConversations,
-      totalMessages: totalMessages,
+      totalMessages,
       totalTokensConsumed,
-      recentTransactions
+      totalCreditsUsed,
+      recentTransactions,
     });
   } catch (error) {
     console.error("Erreur lors du calcul des métriques:", error);
diff --git a/app/api/stats/route.ts b/app/api/stats/route.ts
index 59083d5..16ffb09 100644
--- a/app/api/stats/route.ts
+++ b/app/api/stats/route.ts
@@ -7,6 +7,22 @@ export async function GET() {
 
     // Récupérer toutes les transactions
     const transactions = await db.collection("transactions").find({}).toArray();
+    
+    console.log(`Total transactions trouvées: ${transactions.length}`);
+    
+    // Vérifier les champs de date disponibles dans les transactions
+    if (transactions.length > 0) {
+      const sampleTransaction = transactions[0];
+      console.log("Exemple de transaction:", {
+        _id: sampleTransaction._id,
+        createdAt: sampleTransaction.createdAt,
+        updatedAt: sampleTransaction.updatedAt,
+        date: sampleTransaction.date,
+        timestamp: sampleTransaction.timestamp,
+        rawAmount: sampleTransaction.rawAmount,
+        model: sampleTransaction.model
+      });
+    }
 
     // Calculer les tokens par jour (7 derniers jours)
     const dailyStats = [];
@@ -22,14 +38,44 @@ export async function GET() {
       nextDate.setDate(nextDate.getDate() + 1);
       
       const dayTransactions = transactions.filter(transaction => {
-        const transactionDate = new Date(transaction.createdAt);
+        // Essayer différents champs de date
+        let transactionDate = null;
+        
+        if (transaction.createdAt) {
+          transactionDate = new Date(transaction.createdAt);
+        } else if (transaction.updatedAt) {
+          transactionDate = new Date(transaction.updatedAt);
+        } else if (transaction.date) {
+          transactionDate = new Date(transaction.date);
+        } else if (transaction.timestamp) {
+          transactionDate = new Date(transaction.timestamp);
+        } else if (transaction._id && transaction._id.getTimestamp) {
+          // Utiliser le timestamp de l'ObjectId MongoDB
+          transactionDate = transaction._id.getTimestamp();
+        }
+        
+        if (!transactionDate || isNaN(transactionDate.getTime())) {
+          return false;
+        }
+        
         return transactionDate >= date && transactionDate < nextDate;
       });
       
       const totalTokens = dayTransactions.reduce((sum, transaction) => {
-        return sum + Math.abs(Number(transaction.rawAmount) || 0);
+        // Essayer différents champs pour les tokens
+        let tokens = 0;
+        if (transaction.rawAmount) {
+          tokens = Math.abs(Number(transaction.rawAmount) || 0);
+        } else if (transaction.amount) {
+          tokens = Math.abs(Number(transaction.amount) || 0);
+        } else if (transaction.tokens) {
+          tokens = Math.abs(Number(transaction.tokens) || 0);
+        }
+        return sum + tokens;
       }, 0);
       
+      console.log(`${dayNames[date.getDay()]} (${date.toISOString().split('T')[0]}): ${dayTransactions.length} transactions, ${totalTokens} tokens`);
+      
       dailyStats.push({
         name: dayNames[date.getDay()],
         value: totalTokens
@@ -40,9 +86,19 @@ export async function GET() {
     const modelStats = new Map<string, number>();
     
     transactions.forEach(transaction => {
-      const model = transaction.model || "Inconnu";
-      const tokens = Math.abs(Number(transaction.rawAmount) || 0);
-      modelStats.set(model, (modelStats.get(model) || 0) + tokens);
+      const model = transaction.model || transaction.modelName || "Inconnu";
+      let tokens = 0;
+      if (transaction.rawAmount) {
+        tokens = Math.abs(Number(transaction.rawAmount) || 0);
+      } else if (transaction.amount) {
+        tokens = Math.abs(Number(transaction.amount) || 0);
+      } else if (transaction.tokens) {
+        tokens = Math.abs(Number(transaction.tokens) || 0);
+      }
+      
+      if (tokens > 0) {
+        modelStats.set(model, (modelStats.get(model) || 0) + tokens);
+      }
     });
 
     // Convertir en array et trier par usage
@@ -50,6 +106,12 @@ export async function GET() {
       .map(([name, value]) => ({ name, value }))
       .sort((a, b) => b.value - a.value);
 
+    console.log("Statistiques calculées:", {
+      dailyStats,
+      totalModels: modelData.length,
+      topModel: modelData[0]
+    });
+
     return NextResponse.json({
       dailyTokens: dailyStats,
       modelDistribution: modelData
diff --git a/app/api/user-activity/route.ts b/app/api/user-activity/route.ts
index 85b5563..b0ae9a3 100644
--- a/app/api/user-activity/route.ts
+++ b/app/api/user-activity/route.ts
@@ -8,16 +8,16 @@ export async function GET() {
     // Récupérer tous les utilisateurs
     const users = await db.collection("users").find({}).toArray();
 
-    // Calculer les utilisateurs actifs (dernière semaine)
-    const oneWeekAgo = new Date();
-    oneWeekAgo.setDate(oneWeekAgo.getDate() - 7);
+    // Calculer les utilisateurs actifs (30 derniers jours)
+    const thirtyDaysAgo = new Date();
+    thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);
 
     let activeUsers = 0;
     let inactiveUsers = 0;
 
     users.forEach(user => {
       const lastActivity = new Date(user.updatedAt || user.createdAt);
-      if (lastActivity >= oneWeekAgo) {
+      if (lastActivity >= thirtyDaysAgo) {
         activeUsers++;
       } else {
         inactiveUsers++;
diff --git a/app/login/page.tsx b/app/login/page.tsx
new file mode 100644
index 0000000..ba908c6
--- /dev/null
+++ b/app/login/page.tsx
@@ -0,0 +1,194 @@
+"use client";
+
+import { useState } from "react";
+import { createClient } from "@/lib/supabase/client";
+import { useRouter } from "next/navigation";
+import Image from "next/image";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Alert, AlertDescription } from "@/components/ui/alert";
+import { Loader2, Mail, Lock, Shield } from "lucide-react";
+
+export default function LoginPage() {
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState("");
+  const router = useRouter();
+
+  // Fonction pour traduire les erreurs Supabase en français
+  const getErrorMessage = (error: string) => {
+    const errorMessages: { [key: string]: string } = {
+      "Invalid login credentials": "Identifiants de connexion invalides",
+      "Email not confirmed": "Email non confirmé",
+      "Too many requests": "Trop de tentatives de connexion",
+      "User not found": "Utilisateur non trouvé",
+      "Invalid email": "Adresse email invalide",
+      "Password should be at least 6 characters": "Le mot de passe doit contenir au moins 6 caractères",
+      "Email rate limit exceeded": "Limite de tentatives dépassée",
+      "Invalid email or password": "Email ou mot de passe incorrect",
+      "Account not found": "Compte non trouvé",
+      "Invalid credentials": "Identifiants incorrects",
+      "Authentication failed": "Échec de l'authentification",
+      "Access denied": "Accès refusé",
+      "Unauthorized": "Non autorisé",
+    };
+
+    // Chercher une correspondance exacte
+    if (errorMessages[error]) {
+      return errorMessages[error];
+    }
+
+    // Chercher une correspondance partielle
+    for (const [englishError, frenchError] of Object.entries(errorMessages)) {
+      if (error.toLowerCase().includes(englishError.toLowerCase())) {
+        return frenchError;
+      }
+    }
+
+    // Message par défaut si aucune correspondance
+    return "Erreur de connexion. Vérifiez vos identifiants.";
+  };
+
+  const handleLogin = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setLoading(true);
+    setError("");
+
+    // Validation côté client
+    if (!email || !password) {
+      setError("Veuillez remplir tous les champs");
+      setLoading(false);
+      return;
+    }
+
+    if (!email.includes("@")) {
+      setError("Veuillez entrer une adresse email valide");
+      setLoading(false);
+      return;
+    }
+
+    const supabase = createClient();
+
+    try {
+      const { data, error: authError } = await supabase.auth.signInWithPassword({
+        email,
+        password,
+      });
+
+      if (authError) {
+        setError(getErrorMessage(authError.message));
+        return;
+      }
+
+      if (data.user) {
+        router.push("/");
+        router.refresh();
+      }
+    } catch (error) {
+      console.error('Login error:', error);
+      setError("Une erreur inattendue est survenue. Veuillez réessayer.");
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="min-h-screen bg-gray-50 flex items-center justify-center p-4">
+      <Card className="w-full max-w-md shadow-lg border border-gray-200">
+        <CardHeader className="space-y-6 pb-8">
+          <div className="flex justify-center">
+            <div className="relative w-16 h-16 rounded-full bg-gray-100 p-2">
+              <Image
+                src="/img/logo.png"
+                alt="Logo"
+                width={48}
+                height={48}
+                className="rounded-full"
+              />
+            </div>
+          </div>
+          <div className="text-center space-y-2">
+            <CardTitle className="text-2xl font-bold text-gray-900 flex items-center justify-center gap-2">
+              <Shield className="w-6 h-6 text-gray-700" />
+              Admin Dashboard
+            </CardTitle>
+            <p className="text-gray-600 text-sm">
+              Connectez-vous pour accéder au tableau de bord
+            </p>
+          </div>
+        </CardHeader>
+        
+        <CardContent className="space-y-6">
+          {error && (
+            <Alert className="border-red-200 bg-red-50">
+              <AlertDescription className="text-red-700">
+                {error}
+              </AlertDescription>
+            </Alert>
+          )}
+          
+          <form onSubmit={handleLogin} className="space-y-4">
+            <div className="space-y-2">
+              <label htmlFor="email" className="text-sm font-medium text-gray-700">
+                Email
+              </label>
+              <div className="relative">
+                <Mail className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 w-4 h-4" />
+                <Input
+                  id="email"
+                  type="email"
+                  placeholder="admin@example.com"
+                  value={email}
+                  onChange={(e) => setEmail(e.target.value)}
+                  className="pl-10 border-gray-300 focus:border-gray-900 focus:ring-gray-900"
+                  required
+                />
+              </div>
+            </div>
+            
+            <div className="space-y-2">
+              <label htmlFor="password" className="text-sm font-medium text-gray-700">
+                Mot de passe
+              </label>
+              <div className="relative">
+                <Lock className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 w-4 h-4" />
+                <Input
+                  id="password"
+                  type="password"
+                  placeholder="••••••••"
+                  value={password}
+                  onChange={(e) => setPassword(e.target.value)}
+                  className="pl-10 border-gray-300 focus:border-gray-900 focus:ring-gray-900"
+                  required
+                />
+              </div>
+            </div>
+            
+            <Button
+              type="submit"
+              className="w-full bg-gray-900 hover:bg-gray-800 text-white font-medium py-2.5 transition-colors"
+              disabled={loading}
+            >
+              {loading ? (
+                <>
+                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                  Connexion en cours...
+                </>
+              ) : (
+                "Se connecter"
+              )}
+            </Button>
+          </form>
+          
+          <div className="text-center">
+            <p className="text-xs text-gray-500">
+              Accès réservé aux administrateurs autorisés
+            </p>
+          </div>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}
diff --git a/app/settings/page.tsx b/app/settings/page.tsx
index 55126f7..f2fa0c6 100644
--- a/app/settings/page.tsx
+++ b/app/settings/page.tsx
@@ -1,5 +1,14 @@
-import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
 import { Badge } from "@/components/ui/badge";
+import { Database, Server, Settings } from "lucide-react";
+
+import AddCredits from "@/components/dashboard/add-credits";
 
 export default function SettingsPage() {
   return (
@@ -7,65 +16,73 @@ export default function SettingsPage() {
       <div>
         <h1 className="text-3xl font-bold tracking-tight">Paramètres</h1>
         <p className="text-muted-foreground">
-          Configuration du dashboard Cercle GPT
+          Configuration et maintenance du système
         </p>
       </div>
 
+      {/* Informations système */}
       <div className="grid gap-6 md:grid-cols-2">
         <Card>
-          <CardHeader>
-            <CardTitle>Connexion MongoDB</CardTitle>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium flex items-center gap-2">
+              <Database className="h-4 w-4" />
+              Base de données
+            </CardTitle>
           </CardHeader>
           <CardContent>
             <div className="space-y-2">
               <div className="flex justify-between">
-                <span className="text-sm text-muted-foreground">Statut:</span>
+                <span className="text-sm text-muted-foreground">
+                  Statut MongoDB
+                </span>
                 <Badge variant="default">Connecté</Badge>
               </div>
-              <div className="flex justify-between">
-                <span className="text-sm text-muted-foreground">
-                  Base de données:
-                </span>
-                <span className="text-sm font-mono">Cercle GPT</span>
-              </div>
-              <div className="flex justify-between">
-                <span className="text-sm text-muted-foreground">
-                  Collections:
-                </span>
-                <span className="text-sm">29 collections</span>
-              </div>
             </div>
           </CardContent>
         </Card>
 
         <Card>
-          <CardHeader>
-            <CardTitle>Informations système</CardTitle>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium flex items-center gap-2">
+              <Server className="h-4 w-4" />
+              Informations système
+            </CardTitle>
           </CardHeader>
           <CardContent>
             <div className="space-y-2">
               <div className="flex justify-between">
                 <span className="text-sm text-muted-foreground">
-                  Version Next.js:
+                  Version Next.js
                 </span>
-                <span className="text-sm">15.5.4</span>
+                <Badge variant="secondary">14.x</Badge>
               </div>
               <div className="flex justify-between">
                 <span className="text-sm text-muted-foreground">
-                  Version Node.js:
+                  Version Node.js
                 </span>
-                <span className="text-sm">{process.version}</span>
+                <Badge variant="secondary">18.x</Badge>
               </div>
               <div className="flex justify-between">
                 <span className="text-sm text-muted-foreground">
-                  Environnement:
+                  Environnement
                 </span>
-                <Badge variant="outline">{process.env.NODE_ENV}</Badge>
+                <Badge variant="outline">Development</Badge>
               </div>
             </div>
           </CardContent>
         </Card>
       </div>
+
+      {/* Gestion des crédits */}
+      <div>
+        <h2 className="text-2xl font-bold tracking-tight mb-4 flex items-center gap-2">
+          <Settings className="h-6 w-6" />
+          Gestion des Crédits
+        </h2>
+        <div className="space-y-6">
+          <AddCredits />
+        </div>
+      </div>
     </div>
   );
 }
diff --git a/components/collections/users-table.tsx b/components/collections/users-table.tsx
index 1279c30..8f7194a 100644
--- a/components/collections/users-table.tsx
+++ b/components/collections/users-table.tsx
@@ -96,7 +96,7 @@ export function UsersTable() {
               {users.map((user) => {
                 const userCredits = creditsMap.get(user._id) || 0;
                 const isActive = new Date(user.updatedAt || user.createdAt) > 
-                  new Date(Date.now() - 5 * 60 * 1000); // 5 minutes en millisecondes
+                  new Date(Date.now() - 30 * 24 * 60 * 60 * 1000); // 30 jours en millisecondes
                 
                 return (
                   <TableRow key={user._id}>
@@ -122,13 +122,13 @@ export function UsersTable() {
                       </span>
                     </TableCell>
                     <TableCell>
-                      <Badge variant={isActive ? 'default' : 'destructive'}>
+                      <Badge variant={isActive ? 'default' : 'secondary'}>
                         {isActive ? 'Actif' : 'Inactif'}
                       </Badge>
                     </TableCell>
                     <TableCell>
                       <span className="text-sm text-muted-foreground">
-                        {formatDate(new Date(user.createdAt))}
+                        {formatDate(user.createdAt)}
                       </span>
                     </TableCell>
                   </TableRow>
diff --git a/components/dashboard/add-credits.tsx b/components/dashboard/add-credits.tsx
new file mode 100644
index 0000000..dc88809
--- /dev/null
+++ b/components/dashboard/add-credits.tsx
@@ -0,0 +1,188 @@
+"use client";
+
+import { useState } from "react";
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { Badge } from "@/components/ui/badge";
+import { Plus, DollarSign, Users, TrendingUp } from "lucide-react";
+
+interface AddCreditsStats {
+  totalUsers: number;
+  totalBalances: number;
+  totalCredits: number;
+  averageCredits: number;
+  usersWithoutBalance: number;
+}
+
+interface AddCreditsResult {
+  totalUsers: number;
+  updatedBalances: number;
+  createdBalances: number;
+  creditsPerUser: number;
+  totalCreditsAdded: number;
+}
+
+export default function AddCredits() {
+  const [stats, setStats] = useState<AddCreditsStats | null>(null);
+  const [result, setResult] = useState<AddCreditsResult | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [analyzing, setAnalyzing] = useState(false);
+
+  const analyzeCurrentCredits = async () => {
+    setAnalyzing(true);
+    try {
+      const response = await fetch("/api/add-credits");
+      const data = await response.json();
+      
+      if (data.statistics) {
+        setStats(data.statistics);
+      }
+    } catch (error) {
+      console.error("Erreur lors de l'analyse:", error);
+    } finally {
+      setAnalyzing(false);
+    }
+  };
+
+  const addCreditsToAllUsers = async () => {
+    if (!confirm("Êtes-vous sûr de vouloir ajouter 5 millions de crédits à TOUS les utilisateurs ? Cette action est irréversible.")) {
+      return;
+    }
+
+    setLoading(true);
+    try {
+      const response = await fetch("/api/add-credits", {
+        method: "POST"
+      });
+      
+      const data = await response.json();
+      
+      if (data.success) {
+        setResult(data.statistics);
+        // Rafraîchir les stats
+        await analyzeCurrentCredits();
+      } else {
+        alert("Erreur: " + (data.error || data.message));
+      }
+    } catch (error) {
+      console.error("Erreur lors de l'ajout des crédits:", error);
+      alert("Erreur lors de l'ajout des crédits");
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <Card className="w-full">
+      <CardHeader>
+        <CardTitle className="flex items-center gap-2">
+          <Plus className="h-5 w-5" />
+          Ajouter des Crédits
+        </CardTitle>
+        <CardDescription>
+          Ajouter 5 millions de tokens à tous les utilisateurs existants
+        </CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-4">
+        {/* Bouton d'analyse */}
+        <div className="flex gap-2">
+          <Button 
+            onClick={analyzeCurrentCredits}
+            disabled={analyzing}
+            variant="outline"
+          >
+            {analyzing ? "Analyse..." : "Analyser les crédits actuels"}
+          </Button>
+        </div>
+
+        {/* Statistiques actuelles */}
+        {stats && (
+          <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+            <div className="bg-blue-50 p-3 rounded-lg">
+              <div className="flex items-center gap-2">
+                <Users className="h-4 w-4 text-blue-600" />
+                <span className="text-sm font-medium">Utilisateurs</span>
+              </div>
+              <p className="text-2xl font-bold text-blue-600">{stats.totalUsers}</p>
+            </div>
+            
+            <div className="bg-green-50 p-3 rounded-lg">
+              <div className="flex items-center gap-2">
+                <DollarSign className="h-4 w-4 text-green-600" />
+                <span className="text-sm font-medium">Total Crédits</span>
+              </div>
+              <p className="text-2xl font-bold text-green-600">
+                {stats.totalCredits.toLocaleString()}
+              </p>
+            </div>
+            
+            <div className="bg-purple-50 p-3 rounded-lg">
+              <div className="flex items-center gap-2">
+                <TrendingUp className="h-4 w-4 text-purple-600" />
+                <span className="text-sm font-medium">Moyenne</span>
+              </div>
+              <p className="text-2xl font-bold text-purple-600">
+                {stats.averageCredits.toLocaleString()}
+              </p>
+            </div>
+            
+            <div className="bg-orange-50 p-3 rounded-lg">
+              <div className="flex items-center gap-2">
+                <Users className="h-4 w-4 text-orange-600" />
+                <span className="text-sm font-medium">Sans Balance</span>
+              </div>
+              <p className="text-2xl font-bold text-orange-600">{stats.usersWithoutBalance}</p>
+            </div>
+          </div>
+        )}
+
+        {/* Bouton d'ajout de crédits */}
+        {stats && (
+          <div className="border-t pt-4">
+            <div className="bg-yellow-50 border border-yellow-200 rounded-lg p-4 mb-4">
+              <h4 className="font-semibold text-yellow-800 mb-2">⚠️ Action Importante</h4>
+              <p className="text-yellow-700 text-sm">
+                Cette action va ajouter <strong>5,000,000 crédits</strong> à chacun des {stats.totalUsers} utilisateurs.
+                <br />
+                Total de crédits qui seront ajoutés: <strong>{(stats.totalUsers * 5000000).toLocaleString()}</strong>
+              </p>
+            </div>
+            
+            <Button 
+              onClick={addCreditsToAllUsers}
+              disabled={loading}
+              className="w-full bg-green-600 hover:bg-green-700"
+            >
+              {loading ? "Ajout en cours..." : `Ajouter 5M crédits à ${stats.totalUsers} utilisateurs`}
+            </Button>
+          </div>
+        )}
+
+        {/* Résultats */}
+        {result && (
+          <div className="border-t pt-4">
+            <h4 className="font-semibold text-green-600 mb-3">✅ Crédits ajoutés avec succès !</h4>
+            <div className="grid grid-cols-2 gap-4 text-sm">
+              <div>
+                <span className="text-gray-600">Balances mises à jour:</span>
+                <Badge variant="secondary" className="ml-2">{result.updatedBalances}</Badge>
+              </div>
+              <div>
+                <span className="text-gray-600">Nouvelles balances:</span>
+                <Badge variant="secondary" className="ml-2">{result.createdBalances}</Badge>
+              </div>
+              <div>
+                <span className="text-gray-600">Crédits par utilisateur:</span>
+                <Badge variant="secondary" className="ml-2">{result.creditsPerUser.toLocaleString()}</Badge>
+              </div>
+              <div>
+                <span className="text-gray-600">Total ajouté:</span>
+                <Badge variant="secondary" className="ml-2">{result.totalCreditsAdded.toLocaleString()}</Badge>
+              </div>
+            </div>
+          </div>
+        )}
+      </CardContent>
+    </Card>
+  );
+}
\ No newline at end of file
diff --git a/components/dashboard/charts/model-distribution-chart.tsx b/components/dashboard/charts/model-distribution-chart.tsx
index aeeee0a..0c6ee3f 100644
--- a/components/dashboard/charts/model-distribution-chart.tsx
+++ b/components/dashboard/charts/model-distribution-chart.tsx
@@ -9,14 +9,23 @@ import {
   CartesianGrid,
   Tooltip,
   ResponsiveContainer,
+  Cell,
 } from "recharts";
 
 interface ModelDistributionChartProps {
   title: string;
+  subtitle?: string;
   data: Array<{
     name: string;
     value: number;
+    color?: string;
+    models?: Array<{
+      name: string;
+      value: number;
+    }>;
   }>;
+  showLegend?: boolean;
+  totalTokens?: number;
 }
 
 interface TooltipPayload {
@@ -24,6 +33,11 @@ interface TooltipPayload {
   payload: {
     name: string;
     value: number;
+    color?: string;
+    models?: Array<{
+      name: string;
+      value: number;
+    }>;
   };
 }
 
@@ -32,63 +46,211 @@ interface CustomTooltipProps {
   payload?: TooltipPayload[];
 }
 
-const CustomTooltip = ({ active, payload }: CustomTooltipProps) => {
-  if (active && payload && payload.length) {
-    return (
-      <div style={{
-        backgroundColor: "hsl(var(--background))",
-        border: "1px solid hsl(var(--border))",
-        borderRadius: "8px",
-        padding: "8px",
-        fontSize: "12px"
-      }}>
-        <p style={{ margin: 0, color: "#ff0000" }}>
-          {`${payload[0].value.toLocaleString()} tokens`}
-        </p>
-        <p style={{ margin: 0, color: "#ff0000" }}>
-          {payload[0].payload.name}
-        </p>
-      </div>
-    );
-  }
+// Couleurs par fournisseur selon l'image
+const providerColors: { [key: string]: string } = {
+  Anthropic: "#7C3AED", // Violet vif
+  OpenAI: "#059669", // Vert turquoise vif
+  "Mistral AI": "#D97706", // Orange vif
+  Meta: "#DB2777", // Rose/Magenta vif
+  Google: "#2563EB", // Bleu vif
+  Cohere: "#0891B2", // Cyan vif
+};
+
+// Fonction pour regrouper les modèles par fournisseur
+const groupByProvider = (modelData: Array<{ name: string; value: number }>) => {
+  const providerMap: {
+    [key: string]: {
+      value: number;
+      models: Array<{ name: string; value: number }>;
+    };
+  } = {};
+
+  modelData.forEach((model) => {
+    let provider = "";
+
+    // Déterminer le fournisseur basé sur le nom du modèle
+    if (
+      model.name.toLowerCase().includes("claude") ||
+      model.name.toLowerCase().includes("anthropic")
+    ) {
+      provider = "Anthropic";
+    } else if (
+      model.name.toLowerCase().includes("gpt") ||
+      model.name.toLowerCase().includes("openai")
+    ) {
+      provider = "OpenAI";
+    } else if (model.name.toLowerCase().includes("mistral")) {
+      provider = "Mistral AI";
+    } else if (
+      model.name.toLowerCase().includes("llama") ||
+      model.name.toLowerCase().includes("meta")
+    ) {
+      provider = "Meta";
+    } else if (
+      model.name.toLowerCase().includes("palm") ||
+      model.name.toLowerCase().includes("gemini") ||
+      model.name.toLowerCase().includes("google")
+    ) {
+      provider = "Google";
+    } else if (model.name.toLowerCase().includes("cohere")) {
+      provider = "Cohere";
+    } else {
+      provider = "Autres";
+    }
+
+    if (!providerMap[provider]) {
+      providerMap[provider] = { value: 0, models: [] };
+    }
+
+    providerMap[provider].value += model.value;
+    providerMap[provider].models.push(model);
+  });
+
+  return Object.entries(providerMap).map(([name, data]) => ({
+    name,
+    value: data.value,
+    models: data.models,
+    color: providerColors[name] || "#6B7280",
+  }));
+};
+
+const CustomTooltip = () => {
   return null;
 };
 
 export function ModelDistributionChart({
   title,
+  subtitle,
   data,
+  totalTokens,
 }: ModelDistributionChartProps) {
+  // Si les données sont déjà groupées par fournisseur, les utiliser directement
+  // Sinon, les regrouper automatiquement
+  const groupedData = data[0]?.models ? data : groupByProvider(data);
+
+  // Créer une liste de tous les modèles avec leurs couleurs
+  const allModels = groupedData.flatMap((provider) => 
+    provider.models?.map((model) => ({
+      name: model.name,
+      color: provider.color,
+      value: model.value
+    })) || []
+  );
+
   return (
     <Card>
       <CardHeader className="pb-2">
         <CardTitle className="text-sm font-medium text-muted-foreground">
           {title}
         </CardTitle>
+        {subtitle && (
+          <p className="text-xs text-muted-foreground mt-1">{subtitle}</p>
+        )}
       </CardHeader>
       <CardContent className="pt-0">
         <ResponsiveContainer width="100%" height={200}>
-          <BarChart data={data}>
+          <BarChart
+            data={groupedData}
+            margin={{ top: 10, right: 10, left: 10, bottom: 10 }}
+          >
             <CartesianGrid strokeDasharray="3 3" className="stroke-muted/20" />
             <XAxis
               dataKey="name"
               axisLine={false}
               tickLine={false}
               className="text-xs fill-muted-foreground"
-              tick={false}
+              angle={-45}
+              textAnchor="end"
+              height={60}
+              interval={0}
             />
             <YAxis
               axisLine={false}
               tickLine={false}
               className="text-xs fill-muted-foreground"
+              tickFormatter={(value) => {
+                if (value >= 1000000) return `${(value / 1000000).toFixed(1)}M`;
+                if (value >= 1000) return `${(value / 1000).toFixed(1)}K`;
+                return value.toString();
+              }}
             />
             <Tooltip content={<CustomTooltip />} />
-            <Bar
-              dataKey="value"
-              fill="#000000"
-              radius={[4, 4, 0, 0]}
-            />
+            <Bar dataKey="value" radius={[2, 2, 0, 0]}>
+              {groupedData.map((entry, index) => (
+                <Cell key={`cell-${index}`} fill={entry.color} />
+              ))}
+            </Bar>
           </BarChart>
         </ResponsiveContainer>
+
+        {/* Petites cartes légères pour chaque provider */}
+        <div className="mt-4 grid grid-cols-2 gap-3">
+          {groupedData.map((item, index) => (
+            <div
+              key={index}
+              className="p-3 rounded-lg border border-muted/20 bg-muted/5 hover:bg-muted/10 transition-colors"
+              style={{
+                borderLeftColor: item.color,
+                borderLeftWidth: "3px",
+                borderLeftStyle: "solid",
+              }}
+            >
+              <div className="flex items-center gap-2 mb-1">
+                <div
+                  className="w-2 h-2 rounded-full"
+                  style={{ backgroundColor: item.color }}
+                ></div>
+                <h3
+                  className="text-sm font-medium"
+                  style={{ color: item.color }}
+                >
+                  {item.name}
+                </h3>
+              </div>
+              <p className="text-lg font-semibold text-foreground">
+                {item.value.toLocaleString()}
+              </p>
+              <p className="text-xs text-muted-foreground">tokens</p>
+            </div>
+          ))}
+        </div>
+
+        {/* Total général */}
+        {totalTokens && (
+          <div className="mt-4 pt-3 border-t border-muted/20 text-center">
+            <p className="text-sm text-muted-foreground">
+              Total général:{" "}
+              <span className="font-semibold text-foreground">
+                {totalTokens.toLocaleString()}
+              </span>{" "}
+              tokens
+            </p>
+          </div>
+        )}
+
+        {/* Légende dynamique des modèles */}
+        {allModels.length > 0 && (
+          <div className="mt-4 pt-3 border-t border-muted/20">
+            <h4 className="text-sm font-medium text-muted-foreground mb-3 text-center">
+              Modèles utilisés
+            </h4>
+            <div className="flex flex-wrap justify-center gap-x-4 gap-y-2">
+              {allModels
+                .sort((a, b) => b.value - a.value) // Trier par usage décroissant
+                .map((model, index) => (
+                <div key={index} className="flex items-center gap-2">
+                  <div
+                    className="w-3 h-3 rounded-full flex-shrink-0"
+                    style={{ backgroundColor: model.color }}
+                  ></div>
+                  <span className="text-xs text-muted-foreground">
+                    {model.name}
+                  </span>
+                </div>
+              ))}
+            </div>
+          </div>
+        )}
       </CardContent>
     </Card>
   );
diff --git a/components/dashboard/charts/real-user-activity-chart.tsx b/components/dashboard/charts/real-user-activity-chart.tsx
index a8cec6a..683661b 100644
--- a/components/dashboard/charts/real-user-activity-chart.tsx
+++ b/components/dashboard/charts/real-user-activity-chart.tsx
@@ -44,12 +44,12 @@ export function RealUserActivityChart() {
     {
       name: "Utilisateurs actifs",
       value: activity.activeUsers,
-      color: "#22c55e", // Vert clair pour actifs
+      color: "#000000", // Noir pour actifs
     },
     {
       name: "Utilisateurs inactifs",
       value: activity.inactiveUsers,
-      color: "#ef4444", // Rouge pour inactifs
+      color: "#666666", // Gris pour inactifs
     },
   ];
 
@@ -62,7 +62,7 @@ export function RealUserActivityChart() {
           Activité des utilisateurs
         </CardTitle>
         <p className="text-sm text-muted-foreground">
-          Actifs = connectés dans les 7 derniers jours
+          Actifs = connectés dans les 30 derniers jours
         </p>
       </CardHeader>
       <CardContent>
@@ -74,8 +74,10 @@ export function RealUserActivityChart() {
               cy="50%"
               innerRadius={60}
               outerRadius={100}
-              paddingAngle={5}
+              paddingAngle={2}
               dataKey="value"
+              stroke="#ffffff"
+              strokeWidth={2}
             >
               {data.map((entry, index) => (
                 <Cell key={`cell-${index}`} fill={entry.color} />
@@ -86,17 +88,20 @@ export function RealUserActivityChart() {
                 backgroundColor: "hsl(var(--background))",
                 border: "1px solid hsl(var(--border))",
                 borderRadius: "8px",
+                fontSize: "12px"
               }}
               formatter={(value: number) => [
-                `${value} utilisateurs (${((value / total) * 100).toFixed(
-                  1
-                )}%)`,
+                `${value} utilisateurs (${((value / total) * 100).toFixed(1)}%)`,
                 "",
               ]}
             />
             <Legend
+              wrapperStyle={{
+                paddingTop: "20px",
+                fontSize: "12px"
+              }}
               formatter={(value, entry) => (
-                <span style={{ color: entry.color }}>
+                <span style={{ color: entry.color, fontWeight: 500 }}>
                   {value}: {entry.payload?.value} (
                   {((entry.payload?.value / total) * 100).toFixed(1)}%)
                 </span>
diff --git a/components/dashboard/charts/simple-stats-chart.tsx b/components/dashboard/charts/simple-stats-chart.tsx
index 7b2d06c..1560699 100644
--- a/components/dashboard/charts/simple-stats-chart.tsx
+++ b/components/dashboard/charts/simple-stats-chart.tsx
@@ -31,8 +31,8 @@ export function SimpleStatsChart({ title, data, color = "hsl(var(--primary))" }:
           <AreaChart data={data}>
             <defs>
               <linearGradient id="colorGradient" x1="0" y1="0" x2="0" y2="1">
-                <stop offset="5%" stopColor={color} stopOpacity={0.3}/>
-                <stop offset="95%" stopColor={color} stopOpacity={0}/>
+                <stop offset="5%" stopColor={color} stopOpacity={0.8}/>
+                <stop offset="95%" stopColor={color} stopOpacity={0.2}/>
               </linearGradient>
             </defs>
             <CartesianGrid strokeDasharray="3 3" className="stroke-muted/20" />
@@ -46,6 +46,11 @@ export function SimpleStatsChart({ title, data, color = "hsl(var(--primary))" }:
               axisLine={false}
               tickLine={false}
               className="text-xs fill-muted-foreground"
+              tickFormatter={(value) => {
+                if (value >= 1000000) return `${(value / 1000000).toFixed(1)}M`;
+                if (value >= 1000) return `${(value / 1000).toFixed(1)}K`;
+                return value.toString();
+              }}
             />
             <Tooltip 
               contentStyle={{
@@ -54,12 +59,16 @@ export function SimpleStatsChart({ title, data, color = "hsl(var(--primary))" }:
                 borderRadius: '8px',
                 fontSize: '12px'
               }}
+              formatter={(value: number) => [
+                value >= 1000 ? `${(value / 1000).toFixed(1)}K tokens` : `${value} tokens`,
+                'Tokens consommés'
+              ]}
             />
             <Area 
               type="monotone" 
               dataKey="value" 
               stroke={color}
-              strokeWidth={2}
+              strokeWidth={3}
               fill="url(#colorGradient)"
             />
           </AreaChart>
diff --git a/components/dashboard/charts/user-activity-chart.tsx b/components/dashboard/charts/user-activity-chart.tsx
index 20441c4..fa9b603 100644
--- a/components/dashboard/charts/user-activity-chart.tsx
+++ b/components/dashboard/charts/user-activity-chart.tsx
@@ -20,12 +20,12 @@ export function UserActivityChart({ activeUsers, inactiveUsers }: UserActivityCh
     { 
       name: 'Utilisateurs actifs', 
       value: activeUsers, 
-      color: '#22c55e' // Vert clair pour actifs
+      color: '#000000' // Noir pour actifs
     },
     { 
       name: 'Utilisateurs inactifs', 
       value: inactiveUsers, 
-      color: '#ef4444' // Rouge pour inactifs
+      color: '#666666' // Gris pour inactifs
     },
   ];
 
@@ -36,7 +36,7 @@ export function UserActivityChart({ activeUsers, inactiveUsers }: UserActivityCh
       <CardHeader>
         <CardTitle className="text-base font-medium">Activité des utilisateurs</CardTitle>
         <p className="text-sm text-muted-foreground">
-          Actifs = connectés dans les 7 derniers jours
+          Actifs = connectés dans les 30 derniers jours
         </p>
       </CardHeader>
       <CardContent>
@@ -48,8 +48,10 @@ export function UserActivityChart({ activeUsers, inactiveUsers }: UserActivityCh
               cy="50%"
               innerRadius={60}
               outerRadius={100}
-              paddingAngle={5}
+              paddingAngle={2}
               dataKey="value"
+              stroke="#ffffff"
+              strokeWidth={2}
             >
               {data.map((entry, index) => (
                 <Cell key={`cell-${index}`} fill={entry.color} />
@@ -60,16 +62,22 @@ export function UserActivityChart({ activeUsers, inactiveUsers }: UserActivityCh
                 backgroundColor: 'hsl(var(--background))',
                 border: '1px solid hsl(var(--border))',
                 borderRadius: '8px',
+                fontSize: '12px'
               }}
               formatter={(value: number) => [
                 `${value} utilisateurs (${((value / total) * 100).toFixed(1)}%)`,
-                ''
+                '',
               ]}
             />
-            <Legend 
+            <Legend
+              wrapperStyle={{
+                paddingTop: "20px",
+                fontSize: "12px"
+              }}
               formatter={(value, entry) => (
-                <span style={{ color: entry.color }}>
-                  {value}: {entry.payload?.value} ({((entry.payload?.value / total) * 100).toFixed(1)}%)
+                <span style={{ color: entry.color, fontWeight: 500 }}>
+                  {value}: {entry.payload?.value} (
+                  {((entry.payload?.value / total) * 100).toFixed(1)}%)
                 </span>
               )}
             />
diff --git a/components/dashboard/real-time-stats.tsx b/components/dashboard/real-time-stats.tsx
index e575aad..51bf1bb 100644
--- a/components/dashboard/real-time-stats.tsx
+++ b/components/dashboard/real-time-stats.tsx
@@ -11,7 +11,7 @@ export function RealTimeStats() {
 
   if (loading) {
     return (
-      <div className="grid gap-6 md:grid-cols-2">
+      <div className="space-y-6">
         <div className="h-64 bg-muted animate-pulse rounded-lg" />
         <div className="h-64 bg-muted animate-pulse rounded-lg" />
       </div>
@@ -20,7 +20,7 @@ export function RealTimeStats() {
 
   if (error) {
     return (
-      <div className="grid gap-6 md:grid-cols-2">
+      <div className="space-y-6">
         <Card>
           <CardContent className="flex items-center justify-center h-64">
             <div className="text-center">
@@ -47,7 +47,7 @@ export function RealTimeStats() {
 
   if (!stats) {
     return (
-      <div className="grid gap-6 md:grid-cols-2">
+      <div className="space-y-6">
         <Card>
           <CardContent className="flex items-center justify-center h-64">
             <p className="text-sm text-muted-foreground">
@@ -67,7 +67,7 @@ export function RealTimeStats() {
   }
 
   return (
-    <div className="grid gap-6 md:grid-cols-2">
+    <div className="space-y-6">
       <SimpleStatsChart
         title="Tokens consommés par jour"
         data={stats.dailyTokens}
diff --git a/components/dashboard/usage-analytics.tsx b/components/dashboard/usage-analytics.tsx
index 114b916..bc6e98a 100644
--- a/components/dashboard/usage-analytics.tsx
+++ b/components/dashboard/usage-analytics.tsx
@@ -46,24 +46,20 @@ export function UsageAnalytics() {
 
     setLoading(true);
 
-    // Console log pour débugger les données balances
-    console.log("=== DONNÉES BALANCES RÉCUPÉRÉES ===");
-    console.log("Nombre total d'entrées balances:", balances.length);
-    console.log("Toutes les entrées balances:", balances);
-    
-    // NOUVEAU : Console log pour débugger les utilisateurs
-    console.log("=== DONNÉES UTILISATEURS ===");
-    console.log("Nombre total d'utilisateurs:", users.length);
-    console.log("Premiers 5 utilisateurs:", users.slice(0, 5));
-    
-    // Analyser les doublons
+    console.log("=== CALCUL DES STATISTIQUES ===");
+    console.log("Utilisateurs:", users.length);
+    console.log("Conversations:", conversations.length);
+    console.log("Transactions:", transactions.length);
+    console.log("Balances:", balances.length);
+
+    // Analyser les doublons dans les balances
     const userCounts = new Map<string, number>();
-    balances.forEach(balance => {
+    balances.forEach((balance) => {
       const userId = balance.user;
       userCounts.set(userId, (userCounts.get(userId) || 0) + 1);
     });
-    
-    const duplicateUsers = Array.from(userCounts.entries()).filter(([_, count]) => count > 1);
+
+    const duplicateUsers = Array.from(userCounts.entries()).filter(([, count]) => count > 1);
     console.log("Utilisateurs avec plusieurs entrées:", duplicateUsers);
     
     // Afficher quelques exemples d'entrées
@@ -73,6 +69,29 @@ export function UsageAnalytics() {
     const totalBrut = balances.reduce((sum, balance) => sum + (balance.tokenCredits || 0), 0);
     console.log("Total brut (avec doublons potentiels):", totalBrut);
 
+    // Ajouter des logs détaillés pour comprendre le problème
+    console.log("=== DIAGNOSTIC DÉTAILLÉ ===");
+    
+    // Analyser les doublons
+    const duplicateDetails = Array.from(userCounts.entries())
+      .filter(([, count]) => count > 1)
+      .map(([userId, count]) => {
+        const userBalances = balances.filter(b => b.user === userId);
+        const totalCredits = userBalances.reduce((sum, b) => sum + (b.tokenCredits || 0), 0);
+        return {
+          userId,
+          count,
+          totalCredits,
+          balances: userBalances.map(b => ({
+            credits: b.tokenCredits,
+            createdAt: b.createdAt,
+            updatedAt: b.updatedAt
+          }))
+        };
+      });
+    
+    console.log("Détails des doublons:", duplicateDetails);
+
     // NOUVEAU : Identifier les utilisateurs fantômes
     console.log("=== ANALYSE DES UTILISATEURS FANTÔMES ===");
     const userIds = new Set(users.map(user => user._id));
@@ -90,41 +109,58 @@ export function UsageAnalytics() {
     
     console.log("Crédits des utilisateurs fantômes:", phantomCredits);
     console.log("Crédits des vrais utilisateurs:", totalBrut - phantomCredits);
+    
+    // Analyser les utilisateurs fantômes
+    const phantomDetails = uniquePhantomUsers.map(userId => {
+      const userBalances = balances.filter(b => b.user === userId);
+      const totalCredits = userBalances.reduce((sum, b) => sum + (b.tokenCredits || 0), 0);
+      return { userId, totalCredits, count: userBalances.length };
+    });
+    
+    console.log("Détails des utilisateurs fantômes:", phantomDetails);
 
-    // Calculer les utilisateurs actifs (5 dernières minutes)
-    const fiveMinutesAgo = new Date();
-    fiveMinutesAgo.setMinutes(fiveMinutesAgo.getMinutes() - 5);
+    // Calculer les utilisateurs actifs (30 derniers jours)
+    const thirtyDaysAgo = new Date();
+    thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);
     const activeUsers = users.filter((user) => {
       const lastActivity = new Date(user.updatedAt || user.createdAt);
-      return lastActivity >= fiveMinutesAgo;
+      return lastActivity >= thirtyDaysAgo;
     }).length;
 
-    // CORRECTION : Créer une map des crédits par utilisateur en évitant les doublons
+    // CORRECTION AMÉLIORÉE : Créer une map des crédits par utilisateur
     const creditsMap = new Map<string, number>();
     
     // Grouper les balances par utilisateur
     const balancesByUser = new Map<string, LibreChatBalance[]>();
     balances.forEach((balance) => {
       const userId = balance.user;
-      if (!balancesByUser.has(userId)) {
-        balancesByUser.set(userId, []);
+      // Ignorer les utilisateurs fantômes (qui n'existent plus)
+      if (users.some(user => user._id === userId)) {
+        if (!balancesByUser.has(userId)) {
+          balancesByUser.set(userId, []);
+        }
+        balancesByUser.get(userId)!.push(balance);
       }
-      balancesByUser.get(userId)!.push(balance);
     });
 
-    // Pour chaque utilisateur, prendre seulement la dernière entrée
+    // Pour chaque utilisateur, calculer les crédits selon votre logique métier
     balancesByUser.forEach((userBalances, userId) => {
       if (userBalances.length > 0) {
-        // Trier par date de mise à jour (plus récent en premier)
+        // OPTION A: Prendre la balance la plus récente
         const sortedBalances = userBalances.sort((a, b) => {
           const aDate = new Date((a.updatedAt as string) || (a.createdAt as string) || 0);
           const bDate = new Date((b.updatedAt as string) || (b.createdAt as string) || 0);
           return bDate.getTime() - aDate.getTime();
         });
+        creditsMap.set(userId, sortedBalances[0].tokenCredits || 0);
         
-        // Prendre la plus récente
-        const latestBalance = sortedBalances[0];
-        creditsMap.set(userId, latestBalance.tokenCredits || 0);
+        // OPTION B: Sommer toutes les balances (si c'est votre logique)
+        // const totalCredits = userBalances.reduce((sum, balance) => sum + (balance.tokenCredits || 0), 0);
+        // creditsMap.set(userId, totalCredits);
+        
+        // OPTION C: Prendre la balance avec le plus de crédits
+        // const maxCredits = Math.max(...userBalances.map(b => b.tokenCredits || 0));
+        // creditsMap.set(userId, maxCredits);
       }
     });
 
@@ -167,12 +203,16 @@ export function UsageAnalytics() {
       }
     });
 
-    // CORRECTION : Calculer le total des crédits depuis la map corrigée
+    // Calculer le total des crédits depuis la map corrigée (sans doublons ni fantômes)
     const totalCreditsUsed = Array.from(creditsMap.values()).reduce(
       (sum, credits) => sum + credits,
       0
     );
 
+    console.log("=== RÉSULTATS CORRIGÉS ===");
+    console.log("Crédits totaux (sans doublons ni fantômes):", totalCreditsUsed);
+    console.log("Utilisateurs avec crédits:", creditsMap.size);
+
     // Tous les utilisateurs triés par tokens puis conversations
     const allUsers = Array.from(userStats.entries())
       .map(([userId, stats]) => ({
@@ -242,7 +282,7 @@ export function UsageAnalytics() {
           <CardContent>
             <div className="text-2xl font-bold">{stats.totalUsers}</div>
             <p className="text-xs text-muted-foreground">
-              {stats.activeUsers} actifs cette semaine
+              {stats.activeUsers} actifs ce mois
             </p>
           </CardContent>
         </Card>
diff --git a/components/layout/sidebar.tsx b/components/layout/sidebar.tsx
index b0e8966..861977c 100644
--- a/components/layout/sidebar.tsx
+++ b/components/layout/sidebar.tsx
@@ -1,12 +1,11 @@
 "use client";
 
-import { useState } from "react";
+import { useState, useEffect } from "react";
 import Link from "next/link";
-import { usePathname } from "next/navigation";
+import { usePathname, useRouter } from "next/navigation";
 import { cn } from "@/lib/utils";
 import { Button } from "@/components/ui/button";
-import { Badge } from "@/components/ui/badge";
-import { Separator } from "@/components/ui/separator";
+import { createClient } from "@/lib/supabase/client";
 import Image from "next/image";
 import {
   LayoutDashboard,
@@ -21,135 +20,164 @@ import {
   ChevronLeft,
   ChevronRight,
   BarChart3,
-  Activity,
+  LogOut,
+  User,
+  Mail,
 } from "lucide-react";
+import type { User as SupabaseUser } from "@supabase/supabase-js";
 
-interface NavigationItem {
-  name: string;
-  href: string;
-  icon: React.ElementType;
-  badge?: string | null;
-}
-
-const navigation: NavigationItem[] = [
+const topLevelNavigation = [
   {
-    name: "Vue d'ensemble",
+    name: "Dashboard",
     href: "/",
     icon: LayoutDashboard,
-    badge: null,
   },
   {
     name: "Analytics",
     href: "/analytics",
     icon: BarChart3,
-    badge: "Nouveau",
   },
 ];
 
-const dataNavigation: NavigationItem[] = [
-  { name: "Utilisateurs", href: "/users", icon: Users, badge: null },
+const navigationGroups = [
   {
-    name: "Conversations",
-    href: "/conversations",
-    icon: MessageSquare,
-    badge: null,
+    name: "Données",
+    items: [
+      {
+        name: "Utilisateurs",
+        href: "/users",
+        icon: Users,
+      },
+      {
+        name: "Conversations",
+        href: "/conversations",
+        icon: MessageSquare,
+      },
+      {
+        name: "Messages",
+        href: "/messages",
+        icon: FileText,
+      },
+      {
+        name: "Transactions",
+        href: "/transactions",
+        icon: CreditCard,
+      },
+    ],
   },
-  { name: "Messages", href: "/messages", icon: FileText, badge: null },
   {
-    name: "Transactions",
-    href: "/transactions",
-    icon: CreditCard,
-    badge: null,
+    name: "Système",
+    items: [
+      {
+        name: "Collections",
+        href: "/collections",
+        icon: Database,
+      },
+      {
+        name: "Agents",
+        href: "/agents",
+        icon: Bot,
+      },
+      {
+        name: "Rôles",
+        href: "/roles",
+        icon: Shield,
+      },
+      {
+        name: "Paramètres",
+        href: "/settings",
+        icon: Settings,
+      },
+    ],
   },
 ];
 
-const systemNavigation: NavigationItem[] = [
-  { name: "Agents", href: "/agents", icon: Bot, badge: null },
-  { name: "Rôles", href: "/roles", icon: Shield, badge: null },
-  { name: "Collections", href: "/collections", icon: Database, badge: null },
-  { name: "Paramètres", href: "/settings", icon: Settings, badge: null },
-];
-
 export function Sidebar() {
-  const [collapsed, setCollapsed] = useState(false);
   const pathname = usePathname();
+  const router = useRouter();
+  const [collapsed, setCollapsed] = useState(false);
+  const [user, setUser] = useState<SupabaseUser | null>(null);
+  const [loading, setLoading] = useState(true);
+  const supabase = createClient();
 
-  const NavSection = ({
-    title,
-    items,
-    showTitle = true,
-  }: {
-    title: string;
-    items: NavigationItem[];
-    showTitle?: boolean;
-  }) => (
-    <div className="space-y-2">
-      {!collapsed && showTitle && (
-        <h3 className="px-3 text-xs font-semibold text-muted-foreground uppercase tracking-wider">
-          {title}
-        </h3>
-      )}
-      {items.map((item) => {
-        const isActive = pathname === item.href;
-        return (
-          <Link key={item.name} href={item.href}>
-            <Button
-              variant={isActive ? "secondary" : "ghost"}
-              className={cn(
-                "w-full justify-start h-9 px-3",
-                collapsed && "px-2 justify-center",
-                isActive && "bg-secondary font-medium"
-              )}
-            >
-              <item.icon className={cn("h-4 w-4", collapsed ? "" : "mr-3")} />
-              {!collapsed && (
-                <div className="flex items-center justify-between w-full">
-                  <span>{item.name}</span>
-                  {item.badge && (
-                    <Badge variant="secondary" className="text-xs">
-                      {item.badge}
-                    </Badge>
-                  )}
-                </div>
-              )}
-            </Button>
-          </Link>
+  useEffect(() => {
+    const getUser = async () => {
+      try {
+        const {
+          data: { user },
+        } = await supabase.auth.getUser();
+        setUser(user);
+      } catch (error) {
+        console.error(
+          "Erreur lors de la récupération de l'utilisateur:",
+          error
         );
-      })}
-    </div>
-  );
+        setUser(null);
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    getUser();
+
+    // Écouter les changements d'authentification
+    const {
+      data: { subscription },
+    } = supabase.auth.onAuthStateChange((event, session) => {
+      setUser(session?.user || null);
+      setLoading(false);
+    });
+
+    return () => subscription.unsubscribe();
+  }, [supabase.auth]);
+
+  const handleLogout = async () => {
+    try {
+      await supabase.auth.signOut();
+      router.push("/login");
+      router.refresh();
+    } catch (error) {
+      console.error("Erreur lors de la déconnexion:", error);
+    }
+  };
+
+  // Ne pas afficher la sidebar si l'utilisateur n'est pas connecté ou en cours de chargement
+  if (loading || !user) {
+    return null;
+  }
 
   return (
     <div
       className={cn(
-        "flex flex-col h-screen bg-background border-r border-border transition-all duration-300 ease-in-out",
+        "flex flex-col h-screen bg-white border-r border-gray-200 transition-all duration-300",
         collapsed ? "w-16" : "w-64"
       )}
     >
       {/* Header */}
-      <div className="flex items-center justify-between p-4 border-b border-border">
+      <div className="flex items-center justify-between p-4 border-b border-gray-200 flex-shrink-0">
         {!collapsed && (
-          <div className="flex items-center space-x-2">
-            <div className="w-8 h-8 rounded-lg flex items-center justify-center">
+          <div className="flex items-center space-x-3">
+            <div className="relative w-8 h-8">
               <Image
                 src="/img/logo.png"
-                alt="Cercle GPT Logo"
-                width={32}
-                height={32}
-                className="rounded-lg"
+                alt="Logo"
+                fill
+                className="object-contain"
               />
             </div>
             <div>
-              <h1 className="text-sm font-semibold">Cercle GPT</h1>
-              <p className="text-xs text-muted-foreground">Admin Dashboard</p>
+              <h1 className="text-lg font-semibold text-gray-900">
+                Cercle GPT
+              </h1>
+              <p className="text-xs text-gray-500">Admin Dashboard</p>
             </div>
           </div>
         )}
         <Button
           variant="ghost"
-          size="icon"
+          size="sm"
           onClick={() => setCollapsed(!collapsed)}
-          className="h-8 w-8"
+          className="p-1.5 hover:bg-gray-100"
         >
           {collapsed ? (
             <ChevronRight className="h-4 w-4" />
@@ -160,32 +188,112 @@ export function Sidebar() {
       </div>
 
       {/* Navigation */}
-      <nav className="flex-1 p-3 space-y-6 overflow-y-auto">
-        <NavSection title="Dashboard" items={navigation} showTitle={false} />
+      <nav className="flex-1 p-4 space-y-6 overflow-y-auto">
+        {/* Navigation de niveau supérieur */}
+        <div className="space-y-1">
+          {topLevelNavigation.map((item) => {
+            const isActive = pathname === item.href;
+            return (
+              <Link
+                key={item.name}
+                href={item.href}
+                className={cn(
+                  "flex items-center space-x-3 px-3 py-2 rounded-md text-sm font-medium transition-colors",
+                  isActive
+                    ? "bg-gray-900 text-white"
+                    : "text-gray-700 hover:bg-gray-100 hover:text-gray-900"
+                )}
+              >
+                <item.icon className="h-5 w-5 flex-shrink-0" />
+                {!collapsed && <span>{item.name}</span>}
+              </Link>
+            );
+          })}
+        </div>
 
-        {!collapsed && <Separator />}
+        {/* Séparateur */}
+        <div className="border-t border-gray-200"></div>
 
-        <NavSection title="Données" items={dataNavigation} />
+        {/* Groupes de navigation */}
+        {navigationGroups.map((group) => (
+          <div key={group.name}>
+            {/* Titre du groupe */}
+            {!collapsed && (
+              <h3 className="px-3 mb-2 text-xs font-semibold text-gray-500 uppercase tracking-wider">
+                {group.name}
+              </h3>
+            )}
 
-        {!collapsed && <Separator />}
+            {/* Séparateur visuel quand collapsed */}
+            {collapsed && (
+              <div className="mb-2 mx-auto w-8 h-px bg-gray-300"></div>
+            )}
 
-        <NavSection title="Système" items={systemNavigation} />
-      </nav>
-
-      {/* Footer */}
-      {!collapsed && (
-        <div className="p-3 border-t border-border">
-          <div className="flex items-center space-x-3 p-2 rounded-lg bg-muted/50">
-            <div className="w-8 h-8 bg-primary/10 rounded-full flex items-center justify-center">
-              <Activity className="h-4 w-4 text-primary" />
-            </div>
-            <div className="flex-1 min-w-0">
-              <p className="text-xs font-medium">Système en ligne</p>
-              <p className="text-xs text-muted-foreground">Tout fonctionne</p>
+            {/* Items du groupe */}
+            <div className="space-y-1">
+              {group.items.map((item) => {
+                const isActive = pathname === item.href;
+                return (
+                  <Link
+                    key={item.name}
+                    href={item.href}
+                    className={cn(
+                      "flex items-center space-x-3 px-3 py-2 rounded-md text-sm font-medium transition-colors",
+                      isActive
+                        ? "bg-gray-900 text-white"
+                        : "text-gray-700 hover:bg-gray-100 hover:text-gray-900"
+                    )}
+                  >
+                    <item.icon className="h-5 w-5 flex-shrink-0" />
+                    {!collapsed && <span>{item.name}</span>}
+                  </Link>
+                );
+              })}
             </div>
           </div>
+        ))}
+      </nav>
+
+      {/* Section utilisateur connecté */}
+      <div className="p-4 border-t border-gray-200 space-y-3 flex-shrink-0 bg-white">
+        {/* Informations utilisateur */}
+        <div
+          className={cn(
+            "flex items-center space-x-3 px-3 py-2 bg-gray-50 rounded-md",
+            collapsed && "justify-center"
+          )}
+        >
+          <div className="flex-shrink-0">
+            <div className="w-8 h-8 bg-gray-200 rounded-full flex items-center justify-center">
+              <User className="h-4 w-4 text-gray-600" />
+            </div>
+          </div>
+          {!collapsed && (
+            <div className="flex-1 min-w-0">
+              <p className="text-sm font-medium text-gray-900 truncate">
+                Administrateur
+              </p>
+              <div className="flex items-center space-x-1">
+                <Mail className="h-3 w-3 text-gray-400" />
+                <p className="text-xs text-gray-500 truncate">{user.email}</p>
+              </div>
+            </div>
+          )}
         </div>
-      )}
+
+        {/* Bouton de déconnexion */}
+        <Button
+          variant="outline"
+          onClick={handleLogout}
+          className={cn(
+            "w-full flex items-center space-x-2 text-sm font-medium border-gray-200 hover:bg-gray-50",
+            collapsed && "justify-center px-2"
+          )}
+        >
+          <LogOut className="h-4 w-4" />
+          {!collapsed && <span>Déconnexion</span>}
+        </Button>
+      </div>
     </div>
   );
 }
diff --git a/components/ui/alert.tsx b/components/ui/alert.tsx
new file mode 100644
index 0000000..16b823b
--- /dev/null
+++ b/components/ui/alert.tsx
@@ -0,0 +1,46 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+import { cn } from "@/lib/utils"
+
+const alertVariants = cva(
+  "relative w-full rounded-lg border p-4 [&>svg~*]:pl-7 [&>svg+div]:translate-y-[-3px] [&>svg]:absolute [&>svg]:left-4 [&>svg]:top-4 [&>svg]:text-foreground",
+  {
+    variants: {
+      variant: {
+        default: "bg-background text-foreground",
+        destructive:
+          "border-destructive/50 text-destructive dark:border-destructive [&>svg]:text-destructive",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+const Alert = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement> & VariantProps<typeof alertVariants>
+>(({ className, variant, ...props }, ref) => (
+  <div
+    ref={ref}
+    role="alert"
+    className={cn(alertVariants({ variant }), className)}
+    {...props}
+  />
+))
+Alert.displayName = "Alert"
+
+const AlertDescription = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn("text-sm [&_p]:leading-relaxed", className)}
+    {...props}
+  />
+))
+AlertDescription.displayName = "AlertDescription"
+
+export { Alert, AlertDescription }
\ No newline at end of file
diff --git a/lib/supabase/client.ts b/lib/supabase/client.ts
new file mode 100644
index 0000000..78ff395
--- /dev/null
+++ b/lib/supabase/client.ts
@@ -0,0 +1,8 @@
+import { createBrowserClient } from '@supabase/ssr'
+
+export function createClient() {
+  return createBrowserClient(
+    process.env.NEXT_PUBLIC_SUPABASE_URL!,
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!
+  )
+}
\ No newline at end of file
diff --git a/lib/supabase/server.ts b/lib/supabase/server.ts
new file mode 100644
index 0000000..a627460
--- /dev/null
+++ b/lib/supabase/server.ts
@@ -0,0 +1,29 @@
+import { createServerClient as createSupabaseServerClient } from '@supabase/ssr'
+import { cookies } from 'next/headers'
+
+export async function createServerClient() {
+  const cookieStore = await cookies()
+
+  return createSupabaseServerClient(
+    process.env.NEXT_PUBLIC_SUPABASE_URL!,
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    {
+      cookies: {
+        getAll() {
+          return cookieStore.getAll()
+        },
+        setAll(cookiesToSet: Array<{ name: string; value: string; options?: Record<string, unknown> }>) {
+          try {
+            cookiesToSet.forEach(({ name, value, options }) =>
+              cookieStore.set(name, value, options)
+            )
+          } catch {
+            // The `setAll` method was called from a Server Component.
+            // This can be ignored if you have middleware refreshing
+            // user sessions.
+          }
+        },
+      },
+    }
+  )
+}
\ No newline at end of file
diff --git a/middleware.ts b/middleware.ts
new file mode 100644
index 0000000..ebae12d
--- /dev/null
+++ b/middleware.ts
@@ -0,0 +1,65 @@
+import { createServerClient } from '@supabase/ssr'
+import { NextResponse, type NextRequest } from 'next/server'
+
+export async function middleware(request: NextRequest) {
+  let supabaseResponse = NextResponse.next({
+    request,
+  })
+
+  const supabase = createServerClient(
+    process.env.NEXT_PUBLIC_SUPABASE_URL!,
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    {
+      cookies: {
+        getAll() {
+          return request.cookies.getAll()
+        },
+        setAll(cookiesToSet: Array<{ name: string; value: string; options?: Record<string, unknown> }>) {
+          cookiesToSet.forEach(({ name, value }) => request.cookies.set(name, value))
+          supabaseResponse = NextResponse.next({
+            request,
+          })
+          cookiesToSet.forEach(({ name, value, options }) =>
+            supabaseResponse.cookies.set(name, value, options)
+          )
+        },
+      },
+    }
+  )
+
+  // Rafraîchir la session
+  const { data: { user } } = await supabase.auth.getUser()
+
+  // Si l'utilisateur est sur la page de login
+  if (request.nextUrl.pathname === '/login') {
+    if (user) {
+      // Utilisateur connecté, rediriger vers le dashboard
+      const redirectUrl = new URL('/', request.url)
+      return NextResponse.redirect(redirectUrl)
+    }
+    // Utilisateur non connecté, autoriser l'accès à la page de login
+    return supabaseResponse
+  }
+
+  // Pour toutes les autres pages, vérifier l'authentification
+  if (!user) {
+    // Utilisateur non connecté, rediriger vers login
+    const redirectUrl = new URL('/login', request.url)
+    return NextResponse.redirect(redirectUrl)
+  }
+
+  return supabaseResponse
+}
+
+export const config = {
+  matcher: [
+    /*
+     * Match all request paths except for the ones starting with:
+     * - _next/static (static files)
+     * - _next/image (image optimization files)
+     * - favicon.ico (favicon file)
+     * - public folder
+     */
+    '/((?!_next/static|_next/image|favicon.ico|public|img).*)',
+  ],
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index cade4d0..fab096f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,6 +15,8 @@
         "@radix-ui/react-slot": "^1.2.3",
         "@radix-ui/react-tabs": "^1.1.13",
         "@radix-ui/react-tooltip": "^1.2.8",
+        "@supabase/ssr": "^0.7.0",
+        "@supabase/supabase-js": "^2.58.0",
         "@types/mongodb": "^4.0.6",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
@@ -1761,6 +1763,115 @@
       "integrity": "sha512-e7Mew686owMaPJVNNLs55PUvgz371nKgwsc4vxE49zsODpJEnxgxRo2y/OKrqueavXgZNMDVj3DdHFlaSAeU8g==",
       "license": "MIT"
     },
+    "node_modules/@supabase/auth-js": {
+      "version": "2.72.0",
+      "resolved": "https://registry.npmjs.org/@supabase/auth-js/-/auth-js-2.72.0.tgz",
+      "integrity": "sha512-4+bnUrtTDK1YD0/FCx2YtMiQH5FGu9Jlf4IQi5kcqRwRwqp2ey39V61nHNdH86jm3DIzz0aZKiWfTW8qXk1swQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/functions-js": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/@supabase/functions-js/-/functions-js-2.5.0.tgz",
+      "integrity": "sha512-SXBx6Jvp+MOBekeKFu+G11YLYPeVeGQl23eYyAG9+Ro0pQ1aIP0UZNIBxHKNHqxzR0L0n6gysNr2KT3841NATw==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/node-fetch": {
+      "version": "2.6.15",
+      "resolved": "https://registry.npmjs.org/@supabase/node-fetch/-/node-fetch-2.6.15.tgz",
+      "integrity": "sha512-1ibVeYUacxWYi9i0cf5efil6adJ9WRyZBLivgjs+AUpewx1F3xPi7gLgaASI2SmIQxPoCEjAsLAzKPgMJVgOUQ==",
+      "license": "MIT",
+      "dependencies": {
+        "whatwg-url": "^5.0.0"
+      },
+      "engines": {
+        "node": "4.x || >=6.0.0"
+      }
+    },
+    "node_modules/@supabase/node-fetch/node_modules/tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "license": "MIT"
+    },
+    "node_modules/@supabase/node-fetch/node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "license": "BSD-2-Clause"
+    },
+    "node_modules/@supabase/node-fetch/node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
+    "node_modules/@supabase/postgrest-js": {
+      "version": "1.21.4",
+      "resolved": "https://registry.npmjs.org/@supabase/postgrest-js/-/postgrest-js-1.21.4.tgz",
+      "integrity": "sha512-TxZCIjxk6/dP9abAi89VQbWWMBbybpGWyvmIzTd79OeravM13OjR/YEYeyUOPcM1C3QyvXkvPZhUfItvmhY1IQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/realtime-js": {
+      "version": "2.15.5",
+      "resolved": "https://registry.npmjs.org/@supabase/realtime-js/-/realtime-js-2.15.5.tgz",
+      "integrity": "sha512-/Rs5Vqu9jejRD8ZeuaWXebdkH+J7V6VySbCZ/zQM93Ta5y3mAmocjioa/nzlB6qvFmyylUgKVS1KpE212t30OA==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.13",
+        "@types/phoenix": "^1.6.6",
+        "@types/ws": "^8.18.1",
+        "ws": "^8.18.2"
+      }
+    },
+    "node_modules/@supabase/ssr": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/@supabase/ssr/-/ssr-0.7.0.tgz",
+      "integrity": "sha512-G65t5EhLSJ5c8hTCcXifSL9Q/ZRXvqgXeNo+d3P56f4U1IxwTqjB64UfmfixvmMcjuxnq2yGqEWVJqUcO+AzAg==",
+      "license": "MIT",
+      "dependencies": {
+        "cookie": "^1.0.2"
+      },
+      "peerDependencies": {
+        "@supabase/supabase-js": "^2.43.4"
+      }
+    },
+    "node_modules/@supabase/storage-js": {
+      "version": "2.12.2",
+      "resolved": "https://registry.npmjs.org/@supabase/storage-js/-/storage-js-2.12.2.tgz",
+      "integrity": "sha512-SiySHxi3q7gia7NBYpsYRu8gyI0NhFwSORMxbZIxJ/zAVkN6QpwDRan158CJ+UdzD4WB/rQMAGRqIJQP+7ccAQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/supabase-js": {
+      "version": "2.58.0",
+      "resolved": "https://registry.npmjs.org/@supabase/supabase-js/-/supabase-js-2.58.0.tgz",
+      "integrity": "sha512-Tm1RmQpoAKdQr4/8wiayGti/no+If7RtveVZjHR8zbO7hhQjmPW2Ok5ZBPf1MGkt5c+9R85AVMsTfSaqAP1sUg==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@supabase/auth-js": "2.72.0",
+        "@supabase/functions-js": "2.5.0",
+        "@supabase/node-fetch": "2.6.15",
+        "@supabase/postgrest-js": "1.21.4",
+        "@supabase/realtime-js": "2.15.5",
+        "@supabase/storage-js": "2.12.2"
+      }
+    },
     "node_modules/@swc/helpers": {
       "version": "0.5.15",
       "resolved": "https://registry.npmjs.org/@swc/helpers/-/helpers-0.5.15.tgz",
@@ -2154,12 +2265,17 @@
       "version": "20.19.19",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.19.tgz",
       "integrity": "sha512-pb1Uqj5WJP7wrcbLU7Ru4QtA0+3kAXrkutGiD26wUKzSMgNNaPARTUDQmElUXp64kh3cWdou3Q0C7qwwxqSFmg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "undici-types": "~6.21.0"
       }
     },
+    "node_modules/@types/phoenix": {
+      "version": "1.6.6",
+      "resolved": "https://registry.npmjs.org/@types/phoenix/-/phoenix-1.6.6.tgz",
+      "integrity": "sha512-PIzZZlEppgrpoT2QgbnDU+MMzuR6BbCjllj0bM70lWoejMeNJAxCchxnv7J3XFkI8MpygtRpzXrIlmWUBclP5A==",
+      "license": "MIT"
+    },
     "node_modules/@types/react": {
       "version": "19.2.0",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.0.tgz",
@@ -2203,6 +2319,15 @@
         "@types/webidl-conversions": "*"
       }
     },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "8.45.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.45.0.tgz",
@@ -3261,6 +3386,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cookie": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.0.2.tgz",
+      "integrity": "sha512-9Kr/j4O16ISv8zBBhJoi4bXOYNTkFLOqSL3UDB0njXxCXNezjeyVrJyGOWtgfs/q2km1gwBcfH8q1yEGoMYunA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -7280,7 +7414,6 @@
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
       "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/unrs-resolver": {
@@ -7539,6 +7672,27 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/ws": {
+      "version": "8.18.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
+      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/yallist": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-5.0.0.tgz",
diff --git a/package.json b/package.json
index 532fca4..96193f2 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,8 @@
     "@radix-ui/react-slot": "^1.2.3",
     "@radix-ui/react-tabs": "^1.1.13",
     "@radix-ui/react-tooltip": "^1.2.8",
+    "@supabase/ssr": "^0.7.0",
+    "@supabase/supabase-js": "^2.58.0",
     "@types/mongodb": "^4.0.6",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",