fix: login form and registerForm error KOs

src/components/auth/LoginForm.tsx

@@ -90,7 +90,7 @@ export function LoginForm({ from }: LoginFormProps) {
           {t("login.form.remember")}
         </label>
       </div>
-      {error && error instanceof AppError && <ErrorMessage errorCode={error.code} variant="form" />}
+      {error && <ErrorMessage errorCode={error.code} variant="form" />}
       <button
         type="submit"
         disabled={isLoading}

src/components/auth/RegisterForm.tsx

@@ -101,7 +101,7 @@ export function RegisterForm({ from }: RegisterFormProps) {
           className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50"
         />
       </div>
-      {error && error instanceof AppError && <ErrorMessage errorCode={error.code} variant="form" />}
+      {error && <ErrorMessage errorCode={error.code} variant="form" />}
       <button
         type="submit"
         disabled={isLoading}