feat: add admin role management with user authentication checks and update sidebar for admin access

package.json

@@ -12,6 +12,8 @@
   },
   "dependencies": {
     "@prisma/client": "^6.17.1",
+    "@radix-ui/react-alert-dialog": "^1.1.15",
+    "@radix-ui/react-checkbox": "^1.3.3",
     "@radix-ui/react-dialog": "1.0.5",
     "@radix-ui/react-dropdown-menu": "^2.1.6",
     "@radix-ui/react-progress": "^1.1.2",

pnpm-lock.yaml

@@ -11,6 +11,12 @@ importers:
       '@prisma/client':
         specifier: ^6.17.1
         version: 6.17.1(prisma@6.17.1(typescript@5.3.3))(typescript@5.3.3)
+      '@radix-ui/react-alert-dialog':
+        specifier: ^1.1.15
+        version: 1.1.15(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-checkbox':
+        specifier: ^1.3.3
+        version: 1.3.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
       '@radix-ui/react-dialog':
         specifier: 1.0.5
         version: 1.0.5(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
@@ -578,6 +584,19 @@ packages:
   '@radix-ui/primitive@1.1.3':
     resolution: {integrity: sha512-JTF99U/6XIjCBo0wqkU5sK10glYe27MRRsfwoiq5zzOEZLHU3A3KCMa5X/azekYRCJ0HlwI0crAXS/5dEHTzDg==}
 
+  '@radix-ui/react-alert-dialog@1.1.15':
+    resolution: {integrity: sha512-oTVLkEw5GpdRe29BqJ0LSDFWI3qu0vR1M0mUkOQWDIUnY/QIkLpgDMWuKxP94c2NAC2LGcgVhG1ImF3jkZ5wXw==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
   '@radix-ui/react-arrow@1.1.7':
     resolution: {integrity: sha512-F+M1tLhO+mlQaOWspE8Wstg+z6PwxwRd8oQ8IXceWz92kfAmalTRf0EjrouQeo7QssEPfCn05B4Ihs1K9WQ/7w==}
     peerDependencies:
@@ -591,6 +610,19 @@ packages:
       '@types/react-dom':
         optional: true
 
+  '@radix-ui/react-checkbox@1.3.3':
+    resolution: {integrity: sha512-wBbpv+NQftHDdG86Qc0pIyXk5IR3tM8Vd0nWLKDcX8nNn4nXFOFwsKuqw2okA/1D/mpaAkmuyndrPJTYDNZtFw==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
   '@radix-ui/react-collection@1.0.3':
     resolution: {integrity: sha512-3SzW+0PW7yBBoQlT8wNcGtaxaD0XSu0uLUFgrtHY08Acx05TaHaOmVLR73c0j/cqpDy53KBMO7s0dx2wmOIDIA==}
     peerDependencies:
@@ -666,6 +698,19 @@ packages:
       '@types/react-dom':
         optional: true
 
+  '@radix-ui/react-dialog@1.1.15':
+    resolution: {integrity: sha512-TCglVRtzlffRNxRMEyR36DGBLJpeusFcgMVD9PZEzAKnUs1lKCgX5u9BmC2Yg+LL9MgZDugFFs1Vl+Jp4t/PGw==}
+    peerDependencies:
+      '@types/react': '*'
+      '@types/react-dom': '*'
+      react: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      '@types/react-dom':
+        optional: true
+
   '@radix-ui/react-direction@1.1.1':
     resolution: {integrity: sha512-1UEWRX6jnOA2y4H5WczZ44gOOjTEmlqv1uNW4GAJEO5+bauCBhv8snY65Iw5/VOS/ghKN9gr2KjnLKxrsvoMVw==}
     peerDependencies:
@@ -3483,6 +3528,20 @@ snapshots:
 
   '@radix-ui/primitive@1.1.3': {}
 
+  '@radix-ui/react-alert-dialog@1.1.15(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-context': 1.1.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-dialog': 1.1.15(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-slot': 1.2.3(@types/react@18.2.64)(react@18.2.0)
+      react: 18.2.0
+      react-dom: 18.2.0(react@18.2.0)
+    optionalDependencies:
+      '@types/react': 18.2.64
+      '@types/react-dom': 18.2.21
+
   '@radix-ui/react-arrow@1.1.7(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)':
     dependencies:
       '@radix-ui/react-primitive': 2.1.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
@@ -3492,6 +3551,22 @@ snapshots:
       '@types/react': 18.2.64
       '@types/react-dom': 18.2.21
 
+  '@radix-ui/react-checkbox@1.3.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-context': 1.1.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-presence': 1.1.5(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-use-previous': 1.1.1(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-use-size': 1.1.1(@types/react@18.2.64)(react@18.2.0)
+      react: 18.2.0
+      react-dom: 18.2.0(react@18.2.0)
+    optionalDependencies:
+      '@types/react': 18.2.64
+      '@types/react-dom': 18.2.21
+
   '@radix-ui/react-collection@1.0.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)':
     dependencies:
       '@babel/runtime': 7.28.4
@@ -3566,6 +3641,28 @@ snapshots:
       '@types/react': 18.2.64
       '@types/react-dom': 18.2.21
 
+  '@radix-ui/react-dialog@1.1.15(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)':
+    dependencies:
+      '@radix-ui/primitive': 1.1.3
+      '@radix-ui/react-compose-refs': 1.1.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-context': 1.1.2(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-dismissable-layer': 1.1.11(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-focus-guards': 1.1.3(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-focus-scope': 1.1.7(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-id': 1.1.1(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-portal': 1.1.9(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-presence': 1.1.5(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-primitive': 2.1.3(@types/react-dom@18.2.21)(@types/react@18.2.64)(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
+      '@radix-ui/react-slot': 1.2.3(@types/react@18.2.64)(react@18.2.0)
+      '@radix-ui/react-use-controllable-state': 1.2.2(@types/react@18.2.64)(react@18.2.0)
+      aria-hidden: 1.2.6
+      react: 18.2.0
+      react-dom: 18.2.0(react@18.2.0)
+      react-remove-scroll: 2.7.1(@types/react@18.2.64)(react@18.2.0)
+    optionalDependencies:
+      '@types/react': 18.2.64
+      '@types/react-dom': 18.2.21
+
   '@radix-ui/react-direction@1.1.1(@types/react@18.2.64)(react@18.2.0)':
     dependencies:
       react: 18.2.0

src/app/admin/page.tsx

@@ -0,0 +1,24 @@
+import { AdminService } from "@/lib/services/admin.service";
+import { redirect } from "next/navigation";
+import { isAdmin } from "@/lib/auth-utils";
+import { AdminContent } from "@/components/admin/AdminContent";
+
+export default async function AdminPage() {
+  try {
+    const hasAdminAccess = await isAdmin();
+    
+    if (!hasAdminAccess) {
+      redirect("/");
+    }
+
+    const [users, stats] = await Promise.all([
+      AdminService.getAllUsers(),
+      AdminService.getUserStats(),
+    ]);
+
+    return <AdminContent initialUsers={users} initialStats={stats} />;
+  } catch (error) {
+    console.error("Erreur lors du chargement de la page admin:", error);
+    redirect("/");
+  }
+}

src/app/api/admin/stats/route.ts

@@ -0,0 +1,28 @@
+import { NextResponse } from "next/server";
+import { AdminService } from "@/lib/services/admin.service";
+import { AppError } from "@/utils/errors";
+
+export async function GET() {
+  try {
+    const stats = await AdminService.getUserStats();
+    return NextResponse.json(stats);
+  } catch (error) {
+    console.error("Erreur lors de la récupération des stats:", error);
+
+    if (error instanceof AppError) {
+      return NextResponse.json(
+        { error: error.message, code: error.code },
+        { 
+          status: error.code === "AUTH_FORBIDDEN" ? 403 : 
+                  error.code === "AUTH_UNAUTHENTICATED" ? 401 : 500 
+        }
+      );
+    }
+
+    return NextResponse.json(
+      { error: "Erreur lors de la récupération des stats" },
+      { status: 500 }
+    );
+  }
+}
+

src/app/api/admin/users/[userId]/password/route.ts

@@ -0,0 +1,56 @@
+import { NextRequest, NextResponse } from "next/server";
+import { AdminService } from "@/lib/services/admin.service";
+import { AppError } from "@/utils/errors";
+import { AuthServerService } from "@/lib/services/auth-server.service";
+
+export async function PUT(
+  request: NextRequest,
+  { params }: { params: Promise<{ userId: string }> }
+) {
+  try {
+    const { userId } = await params;
+    const body = await request.json();
+    const { newPassword } = body;
+
+    if (!newPassword) {
+      return NextResponse.json(
+        { error: "Nouveau mot de passe manquant" },
+        { status: 400 }
+      );
+    }
+
+    // Vérifier que le mot de passe est fort
+    if (!AuthServerService.isPasswordStrong(newPassword)) {
+      return NextResponse.json(
+        { 
+          error: "Le mot de passe doit contenir au moins 8 caractères, une majuscule et un chiffre" 
+        },
+        { status: 400 }
+      );
+    }
+
+    await AdminService.resetUserPassword(userId, newPassword);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error("Erreur lors de la réinitialisation du mot de passe:", error);
+
+    if (error instanceof AppError) {
+      return NextResponse.json(
+        { error: error.message, code: error.code },
+        { 
+          status: error.code === "AUTH_FORBIDDEN" ? 403 : 
+                  error.code === "AUTH_UNAUTHENTICATED" ? 401 :
+                  error.code === "AUTH_USER_NOT_FOUND" ? 404 :
+                  error.code === "ADMIN_CANNOT_RESET_OWN_PASSWORD" ? 400 : 500 
+        }
+      );
+    }
+
+    return NextResponse.json(
+      { error: "Erreur lors de la réinitialisation du mot de passe" },
+      { status: 500 }
+    );
+  }
+}
+

src/app/api/admin/users/[userId]/route.ts

@@ -0,0 +1,75 @@
+import { NextRequest, NextResponse } from "next/server";
+import { AdminService } from "@/lib/services/admin.service";
+import { AppError } from "@/utils/errors";
+
+export async function PATCH(
+  request: NextRequest,
+  { params }: { params: Promise<{ userId: string }> }
+) {
+  try {
+    const { userId } = await params;
+    const body = await request.json();
+    const { roles } = body;
+
+    if (!roles || !Array.isArray(roles)) {
+      return NextResponse.json(
+        { error: "Rôles invalides" },
+        { status: 400 }
+      );
+    }
+
+    await AdminService.updateUserRoles(userId, roles);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error("Erreur lors de la mise à jour de l'utilisateur:", error);
+
+    if (error instanceof AppError) {
+      return NextResponse.json(
+        { error: error.message, code: error.code },
+        { 
+          status: error.code === "AUTH_FORBIDDEN" ? 403 : 
+                  error.code === "AUTH_UNAUTHENTICATED" ? 401 :
+                  error.code === "AUTH_USER_NOT_FOUND" ? 404 : 500 
+        }
+      );
+    }
+
+    return NextResponse.json(
+      { error: "Erreur lors de la mise à jour de l'utilisateur" },
+      { status: 500 }
+    );
+  }
+}
+
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ userId: string }> }
+) {
+  try {
+    const { userId } = await params;
+    await AdminService.deleteUser(userId);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error("Erreur lors de la suppression de l'utilisateur:", error);
+
+    if (error instanceof AppError) {
+      return NextResponse.json(
+        { error: error.message, code: error.code },
+        { 
+          status: error.code === "AUTH_FORBIDDEN" ? 403 : 
+                  error.code === "AUTH_UNAUTHENTICATED" ? 401 :
+                  error.code === "AUTH_USER_NOT_FOUND" ? 404 :
+                  error.code === "ADMIN_CANNOT_DELETE_SELF" ? 400 : 500 
+        }
+      );
+    }
+
+    return NextResponse.json(
+      { error: "Erreur lors de la suppression de l'utilisateur" },
+      { status: 500 }
+    );
+  }
+}
+

src/app/api/admin/users/route.ts

@@ -0,0 +1,27 @@
+import { NextResponse } from "next/server";
+import { AdminService } from "@/lib/services/admin.service";
+import { AppError } from "@/utils/errors";
+
+export async function GET() {
+  try {
+    const users = await AdminService.getAllUsers();
+    return NextResponse.json(users);
+  } catch (error) {
+    console.error("Erreur lors de la récupération des utilisateurs:", error);
+
+    if (error instanceof AppError) {
+      return NextResponse.json(
+        { error: error.message, code: error.code },
+        { 
+          status: error.code === "AUTH_FORBIDDEN" ? 403 : 
+                  error.code === "AUTH_UNAUTHENTICATED" ? 401 : 500 
+        }
+      );
+    }
+
+    return NextResponse.json(
+      { error: "Erreur lors de la récupération des utilisateurs" },
+      { status: 500 }
+    );
+  }
+}

src/app/layout.tsx

@@ -74,14 +74,16 @@ export default async function RootLayout({ children }: { children: React.ReactNo
   let libraries: KomgaLibrary[] = [];
   let favorites: KomgaSeries[] = [];
   let preferences: UserPreferences = defaultPreferences;
+  let userIsAdmin = false;
 
   try {
     // Tentative de chargement des données. Si l'utilisateur n'est pas authentifié,
     // les services lanceront une erreur mais l'application continuera de fonctionner
-    const [librariesData, favoritesData, preferencesData] = await Promise.allSettled([
+    const [librariesData, favoritesData, preferencesData, isAdminCheck] = await Promise.allSettled([
       LibraryService.getLibraries(),
       FavoriteService.getAllFavoriteIds(),
       PreferencesService.getPreferences(),
+      import("@/lib/auth-utils").then((m) => m.isAdmin()),
     ]);
 
     if (librariesData.status === "fulfilled") {
@@ -95,6 +97,10 @@ export default async function RootLayout({ children }: { children: React.ReactNo
     if (preferencesData.status === "fulfilled") {
       preferences = preferencesData.value;
     }
+
+    if (isAdminCheck.status === "fulfilled") {
+      userIsAdmin = isAdminCheck.value;
+    }
   } catch (error) {
     console.error("Erreur lors du chargement des données de la sidebar:", error);
   }
@@ -162,7 +168,11 @@ export default async function RootLayout({ children }: { children: React.ReactNo
         <AuthProvider>
           <I18nProvider locale={locale}>
             <PreferencesProvider initialPreferences={preferences}>
-              <ClientLayout initialLibraries={libraries} initialFavorites={favorites}>
+              <ClientLayout 
+                initialLibraries={libraries} 
+                initialFavorites={favorites}
+                userIsAdmin={userIsAdmin}
+              >
                 {children}
               </ClientLayout>
             </PreferencesProvider>

src/components/admin/AdminContent.tsx

@@ -0,0 +1,88 @@
+"use client";
+
+import { useState, useCallback } from "react";
+import type { AdminUserData } from "@/lib/services/admin.service";
+import { StatsCards } from "./StatsCards";
+import { UsersTable } from "./UsersTable";
+import { Button } from "@/components/ui/button";
+import { RefreshCw } from "lucide-react";
+import { useToast } from "@/components/ui/use-toast";
+
+interface AdminContentProps {
+  initialUsers: AdminUserData[];
+  initialStats: {
+    totalUsers: number;
+    totalAdmins: number;
+    usersWithKomga: number;
+    usersWithPreferences: number;
+  };
+}
+
+export function AdminContent({ initialUsers, initialStats }: AdminContentProps) {
+  const [users, setUsers] = useState(initialUsers);
+  const [stats, setStats] = useState(initialStats);
+  const [isRefreshing, setIsRefreshing] = useState(false);
+  const { toast } = useToast();
+
+  const refreshData = useCallback(async () => {
+    setIsRefreshing(true);
+    try {
+      const [usersResponse, statsResponse] = await Promise.all([
+        fetch("/api/admin/users"),
+        fetch("/api/admin/stats"),
+      ]);
+
+      if (!usersResponse.ok || !statsResponse.ok) {
+        throw new Error("Erreur lors du rafraîchissement");
+      }
+
+      const [newUsers, newStats] = await Promise.all([
+        usersResponse.json(),
+        statsResponse.json(),
+      ]);
+
+      setUsers(newUsers);
+      setStats(newStats);
+
+      toast({
+        title: "Données rafraîchies",
+        description: "Les données ont été mises à jour",
+      });
+    } catch {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: "Impossible de rafraîchir les données",
+      });
+    } finally {
+      setIsRefreshing(false);
+    }
+  }, [toast]);
+
+  return (
+    <div className="container mx-auto px-4 py-8">
+      <div className="max-w-7xl mx-auto space-y-8">
+        <div className="flex items-center justify-between">
+          <div>
+            <h1 className="text-3xl font-bold">Administration</h1>
+            <p className="text-muted-foreground mt-2">
+              Gérez les utilisateurs de la plateforme
+            </p>
+          </div>
+          <Button onClick={refreshData} disabled={isRefreshing}>
+            <RefreshCw className={`h-4 w-4 mr-2 ${isRefreshing ? "animate-spin" : ""}`} />
+            Rafraîchir
+          </Button>
+        </div>
+
+        <StatsCards stats={stats} />
+
+        <div>
+          <h2 className="text-2xl font-semibold mb-4">Utilisateurs</h2>
+          <UsersTable users={users} onUserUpdated={refreshData} />
+        </div>
+      </div>
+    </div>
+  );
+}
+

src/components/admin/DeleteUserDialog.tsx

@@ -0,0 +1,92 @@
+"use client";
+
+import { useState } from "react";
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from "@/components/ui/alert-dialog";
+import { useToast } from "@/components/ui/use-toast";
+import type { AdminUserData } from "@/lib/services/admin.service";
+
+interface DeleteUserDialogProps {
+  user: AdminUserData;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onSuccess: () => void;
+}
+
+export function DeleteUserDialog({
+  user,
+  open,
+  onOpenChange,
+  onSuccess,
+}: DeleteUserDialogProps) {
+  const [isLoading, setIsLoading] = useState(false);
+  const { toast } = useToast();
+
+  const handleDelete = async () => {
+    setIsLoading(true);
+
+    try {
+      const response = await fetch(`/api/admin/users/${user.id}`, {
+        method: "DELETE",
+      });
+
+      if (!response.ok) {
+        const data = await response.json();
+        throw new Error(data.error || "Erreur lors de la suppression");
+      }
+
+      toast({
+        title: "Succès",
+        description: "L'utilisateur a été supprimé",
+      });
+
+      onSuccess();
+    } catch (error) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: error instanceof Error ? error.message : "Une erreur est survenue",
+      });
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <AlertDialog open={open} onOpenChange={onOpenChange}>
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>Êtes-vous sûr?</AlertDialogTitle>
+          <AlertDialogDescription>
+            Vous allez supprimer l&apos;utilisateur <strong>{user.email}</strong>.
+            <br />
+            Cette action est irréversible et supprimera également :
+            <ul className="list-disc list-inside mt-2">
+              <li>Sa configuration Komga</li>
+              <li>Ses préférences</li>
+              <li>Ses favoris ({user._count?.favorites || 0})</li>
+            </ul>
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel disabled={isLoading}>Annuler</AlertDialogCancel>
+          <AlertDialogAction
+            onClick={handleDelete}
+            disabled={isLoading}
+            className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
+          >
+            {isLoading ? "Suppression..." : "Supprimer"}
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  );
+}
+

src/components/admin/EditUserDialog.tsx

@@ -0,0 +1,128 @@
+"use client";
+
+import { useState } from "react";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Button } from "@/components/ui/button";
+import { Checkbox } from "@/components/ui/checkbox";
+import { Label } from "@/components/ui/label";
+import { useToast } from "@/components/ui/use-toast";
+import type { AdminUserData } from "@/lib/services/admin.service";
+
+interface EditUserDialogProps {
+  user: AdminUserData;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onSuccess: () => void;
+}
+
+const AVAILABLE_ROLES = [
+  { value: "ROLE_USER", label: "User" },
+  { value: "ROLE_ADMIN", label: "Admin" },
+];
+
+export function EditUserDialog({
+  user,
+  open,
+  onOpenChange,
+  onSuccess,
+}: EditUserDialogProps) {
+  const [selectedRoles, setSelectedRoles] = useState<string[]>(user.roles);
+  const [isLoading, setIsLoading] = useState(false);
+  const { toast } = useToast();
+
+  const handleRoleToggle = (role: string) => {
+    setSelectedRoles((prev) =>
+      prev.includes(role) ? prev.filter((r) => r !== role) : [...prev, role]
+    );
+  };
+
+  const handleSubmit = async () => {
+    if (selectedRoles.length === 0) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: "L'utilisateur doit avoir au moins un rôle",
+      });
+      return;
+    }
+
+    setIsLoading(true);
+
+    try {
+      const response = await fetch(`/api/admin/users/${user.id}`, {
+        method: "PATCH",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ roles: selectedRoles }),
+      });
+
+      if (!response.ok) {
+        const data = await response.json();
+        throw new Error(data.error || "Erreur lors de la mise à jour");
+      }
+
+      toast({
+        title: "Succès",
+        description: "Les rôles ont été mis à jour",
+      });
+
+      onSuccess();
+    } catch (error) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: error instanceof Error ? error.message : "Une erreur est survenue",
+      });
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>Modifier l&apos;utilisateur</DialogTitle>
+          <DialogDescription>
+            Gérer les rôles de <strong>{user.email}</strong>
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-4 py-4">
+          <div className="space-y-2">
+            <Label>Rôles</Label>
+            {AVAILABLE_ROLES.map((role) => (
+              <div key={role.value} className="flex items-center space-x-2">
+                <Checkbox
+                  id={role.value}
+                  checked={selectedRoles.includes(role.value)}
+                  onCheckedChange={() => handleRoleToggle(role.value)}
+                  disabled={isLoading}
+                />
+                <Label htmlFor={role.value} className="font-normal cursor-pointer">
+                  {role.label}
+                </Label>
+              </div>
+            ))}
+          </div>
+        </div>
+
+        <DialogFooter>
+          <Button variant="outline" onClick={() => onOpenChange(false)} disabled={isLoading}>
+            Annuler
+          </Button>
+          <Button onClick={handleSubmit} disabled={isLoading}>
+            {isLoading ? "Enregistrement..." : "Enregistrer"}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
+

src/components/admin/ResetPasswordDialog.tsx

@@ -0,0 +1,170 @@
+"use client";
+
+import { useState } from "react";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { useToast } from "@/components/ui/use-toast";
+import { Lock } from "lucide-react";
+import type { AdminUserData } from "@/lib/services/admin.service";
+
+interface ResetPasswordDialogProps {
+  user: AdminUserData;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onSuccess: () => void;
+}
+
+export function ResetPasswordDialog({
+  user,
+  open,
+  onOpenChange,
+  onSuccess,
+}: ResetPasswordDialogProps) {
+  const [newPassword, setNewPassword] = useState("");
+  const [confirmPassword, setConfirmPassword] = useState("");
+  const [isLoading, setIsLoading] = useState(false);
+  const { toast } = useToast();
+
+  const handleSubmit = async () => {
+    if (!newPassword || !confirmPassword) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: "Veuillez remplir tous les champs",
+      });
+      return;
+    }
+
+    if (newPassword !== confirmPassword) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: "Les mots de passe ne correspondent pas",
+      });
+      return;
+    }
+
+    if (newPassword.length < 8) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: "Le mot de passe doit contenir au moins 8 caractères",
+      });
+      return;
+    }
+
+    setIsLoading(true);
+
+    try {
+      const response = await fetch(`/api/admin/users/${user.id}/password`, {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ newPassword }),
+      });
+
+      if (!response.ok) {
+        const data = await response.json();
+        throw new Error(data.error || "Erreur lors de la réinitialisation");
+      }
+
+      toast({
+        title: "Succès",
+        description: "Le mot de passe a été réinitialisé",
+      });
+
+      setNewPassword("");
+      setConfirmPassword("");
+      onSuccess();
+    } catch (error) {
+      toast({
+        variant: "destructive",
+        title: "Erreur",
+        description: error instanceof Error ? error.message : "Une erreur est survenue",
+      });
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  const handleOpenChange = (open: boolean) => {
+    if (!open) {
+      setNewPassword("");
+      setConfirmPassword("");
+    }
+    onOpenChange(open);
+  };
+
+  return (
+    <Dialog open={open} onOpenChange={handleOpenChange}>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>Réinitialiser le mot de passe</DialogTitle>
+          <DialogDescription>
+            Définir un nouveau mot de passe pour <strong>{user.email}</strong>
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-4 py-4">
+          <div className="space-y-2">
+            <Label htmlFor="newPassword">Nouveau mot de passe</Label>
+            <div className="relative">
+              <Lock className="absolute left-3 top-3 h-4 w-4 text-muted-foreground" />
+              <Input
+                id="newPassword"
+                type="password"
+                value={newPassword}
+                onChange={(e) => setNewPassword(e.target.value)}
+                className="pl-9"
+                placeholder="Minimum 8 caractères"
+                disabled={isLoading}
+              />
+            </div>
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="confirmPassword">Confirmer le mot de passe</Label>
+            <div className="relative">
+              <Lock className="absolute left-3 top-3 h-4 w-4 text-muted-foreground" />
+              <Input
+                id="confirmPassword"
+                type="password"
+                value={confirmPassword}
+                onChange={(e) => setConfirmPassword(e.target.value)}
+                className="pl-9"
+                placeholder="Confirmer le nouveau mot de passe"
+                disabled={isLoading}
+              />
+            </div>
+          </div>
+
+          <p className="text-sm text-muted-foreground">
+            Le mot de passe doit contenir au moins 8 caractères, une majuscule et un chiffre.
+          </p>
+        </div>
+
+        <DialogFooter>
+          <Button 
+            variant="outline" 
+            onClick={() => handleOpenChange(false)} 
+            disabled={isLoading}
+          >
+            Annuler
+          </Button>
+          <Button onClick={handleSubmit} disabled={isLoading}>
+            {isLoading ? "Réinitialisation..." : "Réinitialiser"}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
+

src/components/admin/StatsCards.tsx

@@ -0,0 +1,63 @@
+"use client";
+
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Users, Shield, Settings, Bookmark } from "lucide-react";
+
+interface StatsCardsProps {
+  stats: {
+    totalUsers: number;
+    totalAdmins: number;
+    usersWithKomga: number;
+    usersWithPreferences: number;
+  };
+}
+
+export function StatsCards({ stats }: StatsCardsProps) {
+  const cards = [
+    {
+      title: "Utilisateurs totaux",
+      value: stats.totalUsers,
+      icon: Users,
+      description: "Comptes enregistrés",
+    },
+    {
+      title: "Administrateurs",
+      value: stats.totalAdmins,
+      icon: Shield,
+      description: "Avec privilèges admin",
+    },
+    {
+      title: "Config Komga",
+      value: stats.usersWithKomga,
+      icon: Bookmark,
+      description: "Utilisateurs configurés",
+    },
+    {
+      title: "Préférences",
+      value: stats.usersWithPreferences,
+      icon: Settings,
+      description: "Préférences personnalisées",
+    },
+  ];
+
+  return (
+    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
+      {cards.map((card) => {
+        const Icon = card.icon;
+        return (
+          <Card key={card.title}>
+            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+              <CardTitle className="text-sm font-medium">{card.title}</CardTitle>
+              <Icon className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">{card.value}</div>
+              <p className="text-xs text-muted-foreground">{card.description}</p>
+            </CardContent>
+          </Card>
+        );
+      })}
+    </div>
+  );
+}
+

src/components/admin/UsersTable.tsx

@@ -0,0 +1,170 @@
+"use client";
+
+import { useState } from "react";
+import {
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+} from "@/components/ui/table";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import { Pencil, Trash2, Check, X, KeyRound } from "lucide-react";
+import type { AdminUserData } from "@/lib/services/admin.service";
+import { EditUserDialog } from "./EditUserDialog";
+import { DeleteUserDialog } from "./DeleteUserDialog";
+import { ResetPasswordDialog } from "./ResetPasswordDialog";
+
+interface UsersTableProps {
+  users: AdminUserData[];
+  onUserUpdated: () => void;
+}
+
+export function UsersTable({ users, onUserUpdated }: UsersTableProps) {
+  const [editingUser, setEditingUser] = useState<AdminUserData | null>(null);
+  const [deletingUser, setDeletingUser] = useState<AdminUserData | null>(null);
+  const [resettingPasswordUser, setResettingPasswordUser] = useState<AdminUserData | null>(null);
+
+  return (
+    <>
+      <div className="rounded-md border">
+        <Table>
+          <TableHeader>
+            <TableRow>
+              <TableHead>Email</TableHead>
+              <TableHead>Rôles</TableHead>
+              <TableHead>Config Komga</TableHead>
+              <TableHead>Préférences</TableHead>
+              <TableHead>Favoris</TableHead>
+              <TableHead>Créé le</TableHead>
+              <TableHead className="text-right">Actions</TableHead>
+            </TableRow>
+          </TableHeader>
+          <TableBody>
+            {users.length === 0 ? (
+              <TableRow>
+                <TableCell colSpan={7} className="text-center text-muted-foreground">
+                  Aucun utilisateur
+                </TableCell>
+              </TableRow>
+            ) : (
+              users.map((user) => (
+                <TableRow key={user.id}>
+                  <TableCell className="font-medium">{user.email}</TableCell>
+                  <TableCell>
+                    <div className="flex gap-1">
+                      {user.roles.map((role) => (
+                        <Badge
+                          key={role}
+                          variant={role === "ROLE_ADMIN" ? "default" : "secondary"}
+                        >
+                          {role.replace("ROLE_", "")}
+                        </Badge>
+                      ))}
+                    </div>
+                  </TableCell>
+                  <TableCell>
+                    {user.hasKomgaConfig ? (
+                      <div className="flex items-center gap-2">
+                        <Check className="h-4 w-4 text-green-500" />
+                        <span className="text-xs text-green-600 dark:text-green-400">Configuré</span>
+                      </div>
+                    ) : (
+                      <div className="flex items-center gap-2">
+                        <X className="h-4 w-4 text-red-500" />
+                        <span className="text-xs text-red-600 dark:text-red-400">Non configuré</span>
+                      </div>
+                    )}
+                  </TableCell>
+                  <TableCell>
+                    {user.hasPreferences ? (
+                      <div className="flex items-center gap-2">
+                        <Check className="h-4 w-4 text-green-500" />
+                        <span className="text-xs text-green-600 dark:text-green-400">Oui</span>
+                      </div>
+                    ) : (
+                      <div className="flex items-center gap-2">
+                        <X className="h-4 w-4 text-red-500" />
+                        <span className="text-xs text-red-600 dark:text-red-400">Non</span>
+                      </div>
+                    )}
+                  </TableCell>
+                  <TableCell>{user._count?.favorites || 0}</TableCell>
+                  <TableCell>
+                    {new Date(user.createdAt).toLocaleDateString("fr-FR")}
+                  </TableCell>
+                  <TableCell className="text-right">
+                    <div className="flex justify-end gap-2">
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => setEditingUser(user)}
+                        title="Modifier les rôles"
+                      >
+                        <Pencil className="h-4 w-4" />
+                      </Button>
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => setResettingPasswordUser(user)}
+                        title="Réinitialiser le mot de passe"
+                      >
+                        <KeyRound className="h-4 w-4 text-blue-500" />
+                      </Button>
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => setDeletingUser(user)}
+                        title="Supprimer l'utilisateur"
+                      >
+                        <Trash2 className="h-4 w-4 text-destructive" />
+                      </Button>
+                    </div>
+                  </TableCell>
+                </TableRow>
+              ))
+            )}
+          </TableBody>
+        </Table>
+      </div>
+
+      {editingUser && (
+        <EditUserDialog
+          user={editingUser}
+          open={!!editingUser}
+          onOpenChange={(open) => !open && setEditingUser(null)}
+          onSuccess={() => {
+            setEditingUser(null);
+            onUserUpdated();
+          }}
+        />
+      )}
+
+      {resettingPasswordUser && (
+        <ResetPasswordDialog
+          user={resettingPasswordUser}
+          open={!!resettingPasswordUser}
+          onOpenChange={(open) => !open && setResettingPasswordUser(null)}
+          onSuccess={() => {
+            setResettingPasswordUser(null);
+          }}
+        />
+      )}
+
+      {deletingUser && (
+        <DeleteUserDialog
+          user={deletingUser}
+          open={!!deletingUser}
+          onOpenChange={(open) => !open && setDeletingUser(null)}
+          onSuccess={() => {
+            setDeletingUser(null);
+            onUserUpdated();
+          }}
+        />
+      )}
+    </>
+  );
+}
+

src/components/layout/ClientLayout.tsx

@@ -20,9 +20,10 @@ interface ClientLayoutProps {
   children: React.ReactNode;
   initialLibraries: KomgaLibrary[];
   initialFavorites: KomgaSeries[];
+  userIsAdmin?: boolean;
 }
 
-export default function ClientLayout({ children, initialLibraries = [], initialFavorites = [] }: ClientLayoutProps) {
+export default function ClientLayout({ children, initialLibraries = [], initialFavorites = [], userIsAdmin = false }: ClientLayoutProps) {
   const [isSidebarOpen, setIsSidebarOpen] = useState(false);
   const pathname = usePathname();
 
@@ -77,7 +78,8 @@ export default function ClientLayout({ children, initialLibraries = [], initialF
               isOpen={isSidebarOpen} 
               onClose={handleCloseSidebar} 
               initialLibraries={initialLibraries} 
-              initialFavorites={initialFavorites} 
+              initialFavorites={initialFavorites}
+              userIsAdmin={userIsAdmin}
             />
           )}
           <main className={`${!isPublicRoute ? "container pt-safe" : ""}`}>{children}</main>

src/components/layout/Sidebar.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { Home, Library, Settings, LogOut, RefreshCw, Star, Download, User } from "lucide-react";
+import { Home, Library, Settings, LogOut, RefreshCw, Star, Download, User, Shield } from "lucide-react";
 import { usePathname, useRouter } from "next/navigation";
 import { cn } from "@/lib/utils";
 import { signOut } from "next-auth/react";
@@ -18,9 +18,10 @@ interface SidebarProps {
   onClose: () => void;
   initialLibraries: KomgaLibrary[];
   initialFavorites: KomgaSeries[];
+  userIsAdmin?: boolean;
 }
 
-export function Sidebar({ isOpen, onClose, initialLibraries, initialFavorites }: SidebarProps) {
+export function Sidebar({ isOpen, onClose, initialLibraries, initialFavorites, userIsAdmin = false }: SidebarProps) {
   const { t } = useTranslate();
   const pathname = usePathname();
   const router = useRouter();
@@ -294,6 +295,18 @@ export function Sidebar({ isOpen, onClose, initialLibraries, initialFavorites }:
               <Settings className="mr-2 h-4 w-4" />
               {t("sidebar.settings.preferences")}
             </button>
+            {userIsAdmin && (
+              <button
+                onClick={() => handleLinkClick("/admin")}
+                className={cn(
+                  "w-full flex items-center rounded-lg px-3 py-2 text-sm font-medium hover:bg-accent hover:text-accent-foreground",
+                  pathname === "/admin" ? "bg-accent" : "transparent"
+                )}
+              >
+                <Shield className="mr-2 h-4 w-4" />
+                {t("sidebar.admin")}
+              </button>
+            )}
           </div>
         </div>
       </div>

src/components/ui/alert-dialog.tsx

@@ -0,0 +1,117 @@
+"use client";
+
+import * as React from "react";
+import * as AlertDialogPrimitive from "@radix-ui/react-alert-dialog";
+
+import { cn } from "@/lib/utils";
+import { buttonVariants } from "@/components/ui/button";
+
+const AlertDialog = AlertDialogPrimitive.Root;
+
+const AlertDialogTrigger = AlertDialogPrimitive.Trigger;
+
+const AlertDialogPortal = AlertDialogPrimitive.Portal;
+
+const AlertDialogOverlay = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Overlay
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+    ref={ref}
+  />
+));
+AlertDialogOverlay.displayName = AlertDialogPrimitive.Overlay.displayName;
+
+const AlertDialogContent = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Content>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPortal>
+    <AlertDialogOverlay />
+    <AlertDialogPrimitive.Content
+      ref={ref}
+      className={cn(
+        "fixed left-[50%] top-[50%] z-50 grid w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] sm:rounded-lg",
+        className
+      )}
+      {...props}
+    />
+  </AlertDialogPortal>
+));
+AlertDialogContent.displayName = AlertDialogPrimitive.Content.displayName;
+
+const AlertDialogHeader = ({ className, ...props }: React.HTMLAttributes<HTMLDivElement>) => (
+  <div className={cn("flex flex-col space-y-2 text-center sm:text-left", className)} {...props} />
+);
+AlertDialogHeader.displayName = "AlertDialogHeader";
+
+const AlertDialogFooter = ({ className, ...props }: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn("flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2", className)}
+    {...props}
+  />
+);
+AlertDialogFooter.displayName = "AlertDialogFooter";
+
+const AlertDialogTitle = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Title
+    ref={ref}
+    className={cn("text-lg font-semibold", className)}
+    {...props}
+  />
+));
+AlertDialogTitle.displayName = AlertDialogPrimitive.Title.displayName;
+
+const AlertDialogDescription = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+));
+AlertDialogDescription.displayName = AlertDialogPrimitive.Description.displayName;
+
+const AlertDialogAction = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Action>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Action>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Action ref={ref} className={cn(buttonVariants(), className)} {...props} />
+));
+AlertDialogAction.displayName = AlertDialogPrimitive.Action.displayName;
+
+const AlertDialogCancel = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Cancel>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Cancel>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Cancel
+    ref={ref}
+    className={cn(buttonVariants({ variant: "outline" }), "mt-2 sm:mt-0", className)}
+    {...props}
+  />
+));
+AlertDialogCancel.displayName = AlertDialogPrimitive.Cancel.displayName;
+
+export {
+  AlertDialog,
+  AlertDialogPortal,
+  AlertDialogOverlay,
+  AlertDialogTrigger,
+  AlertDialogContent,
+  AlertDialogHeader,
+  AlertDialogFooter,
+  AlertDialogTitle,
+  AlertDialogDescription,
+  AlertDialogAction,
+  AlertDialogCancel,
+};

src/components/ui/checkbox.tsx

@@ -0,0 +1,29 @@
+"use client";
+
+import * as React from "react";
+import * as CheckboxPrimitive from "@radix-ui/react-checkbox";
+import { Check } from "lucide-react";
+
+import { cn } from "@/lib/utils";
+
+const Checkbox = React.forwardRef<
+  React.ElementRef<typeof CheckboxPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof CheckboxPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <CheckboxPrimitive.Root
+    ref={ref}
+    className={cn(
+      "peer h-4 w-4 shrink-0 rounded-sm border border-primary ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=checked]:text-primary-foreground",
+      className
+    )}
+    {...props}
+  >
+    <CheckboxPrimitive.Indicator className={cn("flex items-center justify-center text-current")}>
+      <Check className="h-4 w-4" />
+    </CheckboxPrimitive.Indicator>
+  </CheckboxPrimitive.Root>
+));
+Checkbox.displayName = CheckboxPrimitive.Root.displayName;
+
+export { Checkbox };
+

src/components/ui/dialog.tsx

@@ -0,0 +1,104 @@
+"use client";
+
+import * as React from "react";
+import * as DialogPrimitive from "@radix-ui/react-dialog";
+import { X } from "lucide-react";
+
+import { cn } from "@/lib/utils";
+
+const Dialog = DialogPrimitive.Root;
+
+const DialogTrigger = DialogPrimitive.Trigger;
+
+const DialogPortal = DialogPrimitive.Portal;
+
+const DialogClose = DialogPrimitive.Close;
+
+const DialogOverlay = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Overlay
+    ref={ref}
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+  />
+));
+DialogOverlay.displayName = DialogPrimitive.Overlay.displayName;
+
+const DialogContent = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content>
+>(({ className, children, ...props }, ref) => (
+  <DialogPortal>
+    <DialogOverlay />
+    <DialogPrimitive.Content
+      ref={ref}
+      className={cn(
+        "fixed left-[50%] top-[50%] z-50 grid w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] sm:rounded-lg",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      <DialogPrimitive.Close className="absolute right-4 top-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
+        <X className="h-4 w-4" />
+        <span className="sr-only">Close</span>
+      </DialogPrimitive.Close>
+    </DialogPrimitive.Content>
+  </DialogPortal>
+));
+DialogContent.displayName = DialogPrimitive.Content.displayName;
+
+const DialogHeader = ({ className, ...props }: React.HTMLAttributes<HTMLDivElement>) => (
+  <div className={cn("flex flex-col space-y-1.5 text-center sm:text-left", className)} {...props} />
+);
+DialogHeader.displayName = "DialogHeader";
+
+const DialogFooter = ({ className, ...props }: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn("flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2", className)}
+    {...props}
+  />
+);
+DialogFooter.displayName = "DialogFooter";
+
+const DialogTitle = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Title
+    ref={ref}
+    className={cn("text-lg font-semibold leading-none tracking-tight", className)}
+    {...props}
+  />
+));
+DialogTitle.displayName = DialogPrimitive.Title.displayName;
+
+const DialogDescription = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+));
+DialogDescription.displayName = DialogPrimitive.Description.displayName;
+
+export {
+  Dialog,
+  DialogPortal,
+  DialogOverlay,
+  DialogClose,
+  DialogTrigger,
+  DialogContent,
+  DialogHeader,
+  DialogFooter,
+  DialogTitle,
+  DialogDescription,
+};

src/components/ui/table.tsx

@@ -0,0 +1,96 @@
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+const Table = React.forwardRef<HTMLTableElement, React.HTMLAttributes<HTMLTableElement>>(
+  ({ className, ...props }, ref) => (
+    <div className="relative w-full overflow-auto">
+      <table
+        ref={ref}
+        className={cn("w-full caption-bottom text-sm", className)}
+        {...props}
+      />
+    </div>
+  )
+);
+Table.displayName = "Table";
+
+const TableHeader = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <thead ref={ref} className={cn("[&_tr]:border-b", className)} {...props} />
+));
+TableHeader.displayName = "TableHeader";
+
+const TableBody = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <tbody ref={ref} className={cn("[&_tr:last-child]:border-0", className)} {...props} />
+));
+TableBody.displayName = "TableBody";
+
+const TableFooter = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <tfoot
+    ref={ref}
+    className={cn("border-t bg-muted/50 font-medium [&>tr]:last:border-b-0", className)}
+    {...props}
+  />
+));
+TableFooter.displayName = "TableFooter";
+
+const TableRow = React.forwardRef<HTMLTableRowElement, React.HTMLAttributes<HTMLTableRowElement>>(
+  ({ className, ...props }, ref) => (
+    <tr
+      ref={ref}
+      className={cn(
+        "border-b transition-colors hover:bg-muted/50 data-[state=selected]:bg-muted",
+        className
+      )}
+      {...props}
+    />
+  )
+);
+TableRow.displayName = "TableRow";
+
+const TableHead = React.forwardRef<
+  HTMLTableCellElement,
+  React.ThHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <th
+    ref={ref}
+    className={cn(
+      "h-12 px-4 text-left align-middle font-medium text-muted-foreground [&:has([role=checkbox])]:pr-0",
+      className
+    )}
+    {...props}
+  />
+));
+TableHead.displayName = "TableHead";
+
+const TableCell = React.forwardRef<
+  HTMLTableCellElement,
+  React.TdHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <td
+    ref={ref}
+    className={cn("p-4 align-middle [&:has([role=checkbox])]:pr-0", className)}
+    {...props}
+  />
+));
+TableCell.displayName = "TableCell";
+
+const TableCaption = React.forwardRef<
+  HTMLTableCaptionElement,
+  React.HTMLAttributes<HTMLTableCaptionElement>
+>(({ className, ...props }, ref) => (
+  <caption ref={ref} className={cn("mt-4 text-sm text-muted-foreground", className)} {...props} />
+));
+TableCaption.displayName = "TableCaption";
+
+export { Table, TableHeader, TableBody, TableFooter, TableHead, TableRow, TableCell, TableCaption };
+

src/constants/errorCodes.ts

@@ -18,6 +18,7 @@ export const ERROR_CODES = {
     INVALID_PASSWORD: "AUTH_INVALID_PASSWORD",
     PASSWORD_CHANGE_ERROR: "AUTH_PASSWORD_CHANGE_ERROR",
     FETCH_ERROR: "AUTH_FETCH_ERROR",
+    FORBIDDEN: "AUTH_FORBIDDEN",
   },
   KOMGA: {
     MISSING_CONFIG: "KOMGA_MISSING_CONFIG",
@@ -95,6 +96,15 @@ export const ERROR_CODES = {
     NETWORK_ERROR: "CLIENT_NETWORK_ERROR",
     REQUEST_FAILED: "CLIENT_REQUEST_FAILED",
   },
+  ADMIN: {
+    FETCH_USERS_ERROR: "ADMIN_FETCH_USERS_ERROR",
+    UPDATE_USER_ERROR: "ADMIN_UPDATE_USER_ERROR",
+    DELETE_USER_ERROR: "ADMIN_DELETE_USER_ERROR",
+    FETCH_STATS_ERROR: "ADMIN_FETCH_STATS_ERROR",
+    CANNOT_DELETE_SELF: "ADMIN_CANNOT_DELETE_SELF",
+    RESET_PASSWORD_ERROR: "ADMIN_RESET_PASSWORD_ERROR",
+    CANNOT_RESET_OWN_PASSWORD: "ADMIN_CANNOT_RESET_OWN_PASSWORD",
+  },
 } as const;
 
 type Values<T> = T[keyof T];

src/i18n/messages/en/common.json

@@ -62,6 +62,7 @@
       "title": "Settings",
       "preferences": "Preferences"
     },
+    "admin": "Administration",
     "logout": "Sign out"
   },
   "settings": {

src/i18n/messages/fr/common.json

@@ -62,6 +62,7 @@
       "title": "Configuration",
       "preferences": "Préférences"
     },
+    "admin": "Administration",
     "logout": "Se déconnecter"
   },
   "settings": {

src/lib/auth-utils.ts

@@ -15,3 +15,22 @@ export async function getCurrentUser(): Promise<UserData | null> {
     authenticated: true,
   };
 }
+
+export async function isAdmin(): Promise<boolean> {
+  const user = await getCurrentUser();
+  return user?.roles.includes("ROLE_ADMIN") ?? false;
+}
+
+export async function requireAdmin(): Promise<UserData> {
+  const user = await getCurrentUser();
+  
+  if (!user) {
+    throw new Error("Unauthenticated");
+  }
+  
+  if (!user.roles.includes("ROLE_ADMIN")) {
+    throw new Error("Forbidden: Admin access required");
+  }
+  
+  return user;
+}

src/lib/services/admin.service.ts

@@ -0,0 +1,208 @@
+import prisma from "@/lib/prisma";
+import { requireAdmin } from "../auth-utils";
+import { ERROR_CODES } from "../../constants/errorCodes";
+import { AppError } from "../../utils/errors";
+
+export interface AdminUserData {
+  id: string;
+  email: string;
+  roles: string[];
+  createdAt: Date;
+  updatedAt: Date;
+  _count?: {
+    favorites: number;
+  };
+  hasKomgaConfig: boolean;
+  hasPreferences: boolean;
+}
+
+export class AdminService {
+  static async getAllUsers(): Promise<AdminUserData[]> {
+    try {
+      await requireAdmin();
+
+      const users = await prisma.user.findMany({
+        select: {
+          id: true,
+          email: true,
+          roles: true,
+          createdAt: true,
+          updatedAt: true,
+          _count: {
+            select: {
+              favorites: true,
+            },
+          },
+        },
+        orderBy: {
+          createdAt: "desc",
+        },
+      });
+
+      // Vérifier les configs pour chaque user
+      const usersWithConfigs = await Promise.all(
+        users.map(async (user) => {
+          const [komgaConfig, preferences] = await Promise.all([
+            prisma.komgaConfig.findUnique({
+              where: { userId: user.id },
+              select: { id: true },
+            }),
+            prisma.preferences.findUnique({
+              where: { userId: user.id },
+              select: { id: true },
+            }),
+          ]);
+
+          return {
+            ...user,
+            hasKomgaConfig: !!komgaConfig,
+            hasPreferences: !!preferences,
+          };
+        })
+      );
+
+      return usersWithConfigs;
+    } catch (error) {
+      if (error instanceof Error && error.message.includes("Forbidden")) {
+        throw new AppError(ERROR_CODES.AUTH.FORBIDDEN);
+      }
+      if (error instanceof AppError) {
+        throw error;
+      }
+      throw new AppError(ERROR_CODES.ADMIN.FETCH_USERS_ERROR, {}, error);
+    }
+  }
+
+  static async updateUserRoles(userId: string, roles: string[]): Promise<void> {
+    try {
+      await requireAdmin();
+
+      // Vérifier que l'utilisateur existe
+      const user = await prisma.user.findUnique({
+        where: { id: userId },
+      });
+
+      if (!user) {
+        throw new AppError(ERROR_CODES.AUTH.USER_NOT_FOUND);
+      }
+
+      // Mettre à jour les rôles
+      await prisma.user.update({
+        where: { id: userId },
+        data: { roles },
+      });
+    } catch (error) {
+      if (error instanceof Error && error.message.includes("Forbidden")) {
+        throw new AppError(ERROR_CODES.AUTH.FORBIDDEN);
+      }
+      if (error instanceof AppError) {
+        throw error;
+      }
+      throw new AppError(ERROR_CODES.ADMIN.UPDATE_USER_ERROR, {}, error);
+    }
+  }
+
+  static async deleteUser(userId: string): Promise<void> {
+    try {
+      const admin = await requireAdmin();
+
+      // Empêcher la suppression de son propre compte
+      if (admin.id === userId) {
+        throw new AppError(ERROR_CODES.ADMIN.CANNOT_DELETE_SELF);
+      }
+
+      // Vérifier que l'utilisateur existe
+      const user = await prisma.user.findUnique({
+        where: { id: userId },
+      });
+
+      if (!user) {
+        throw new AppError(ERROR_CODES.AUTH.USER_NOT_FOUND);
+      }
+
+      // Supprimer l'utilisateur (cascade supprimera les relations)
+      await prisma.user.delete({
+        where: { id: userId },
+      });
+    } catch (error) {
+      if (error instanceof Error && error.message.includes("Forbidden")) {
+        throw new AppError(ERROR_CODES.AUTH.FORBIDDEN);
+      }
+      if (error instanceof AppError) {
+        throw error;
+      }
+      throw new AppError(ERROR_CODES.ADMIN.DELETE_USER_ERROR, {}, error);
+    }
+  }
+
+  static async resetUserPassword(userId: string, newPassword: string): Promise<void> {
+    try {
+      const admin = await requireAdmin();
+
+      // Empêcher la modification de son propre mot de passe via cette méthode
+      if (admin.id === userId) {
+        throw new AppError(ERROR_CODES.ADMIN.CANNOT_RESET_OWN_PASSWORD);
+      }
+
+      // Vérifier que l'utilisateur existe
+      const user = await prisma.user.findUnique({
+        where: { id: userId },
+      });
+
+      if (!user) {
+        throw new AppError(ERROR_CODES.AUTH.USER_NOT_FOUND);
+      }
+
+      // Hasher le nouveau mot de passe
+      const bcrypt = await import("bcryptjs");
+      const hashedPassword = await bcrypt.hash(newPassword, 10);
+
+      // Mettre à jour le mot de passe
+      await prisma.user.update({
+        where: { id: userId },
+        data: { password: hashedPassword },
+      });
+    } catch (error) {
+      if (error instanceof Error && error.message.includes("Forbidden")) {
+        throw new AppError(ERROR_CODES.AUTH.FORBIDDEN);
+      }
+      if (error instanceof AppError) {
+        throw error;
+      }
+      throw new AppError(ERROR_CODES.ADMIN.RESET_PASSWORD_ERROR, {}, error);
+    }
+  }
+
+  static async getUserStats() {
+    try {
+      await requireAdmin();
+
+      const [totalUsers, totalAdmins, usersWithKomga, usersWithPreferences] =
+        await Promise.all([
+          prisma.user.count(),
+          prisma.user.count({
+            where: {
+              roles: {
+                has: "ROLE_ADMIN",
+              },
+            },
+          }),
+          prisma.komgaConfig.count(),
+          prisma.preferences.count(),
+        ]);
+
+      return {
+        totalUsers,
+        totalAdmins,
+        usersWithKomga,
+        usersWithPreferences,
+      };
+    } catch (error) {
+      if (error instanceof Error && error.message.includes("Forbidden")) {
+        throw new AppError(ERROR_CODES.AUTH.FORBIDDEN);
+      }
+      throw new AppError(ERROR_CODES.ADMIN.FETCH_STATS_ERROR, {}, error);
+    }
+  }
+}
+