feat: implement user authentication and route protection using NextAuth middleware and server actions.

src/features/auth/api/login-action.ts

@@ -11,7 +11,7 @@ export async function loginAction(prevState: string | undefined, formData: FormD
         await signIn("credentials", {
             username: formData.get("username"),
             password: formData.get("password"),
-            redirectTo: "/dashboard"
+            redirectTo: "/grid"
         });
     } catch (error) {
         if (error instanceof AuthError) {

src/middleware.ts

@@ -21,7 +21,7 @@ export default auth((req) => {
 
     // 3. Rediriger vers le dashboard si déjà connecté et sur /login
     if (isLoggedIn && isPublicRoute) {
-        return NextResponse.redirect(new URL("/dashboard", nextUrl));
+        return NextResponse.redirect(new URL("/grid", nextUrl));
     }
 
     // 4. Protection par rôle (Admin seulement pour les paramètres)
@@ -29,7 +29,7 @@ export default auth((req) => {
     const userRole = (req.auth?.user as any)?.role;
 
     if (isAdminRoute && userRole !== "admin") {
-        return NextResponse.redirect(new URL("/dashboard", nextUrl));
+        return NextResponse.redirect(new URL("/grid", nextUrl));
     }
 
     return NextResponse.next();