fix error2

src/app/devices/page.tsx

@@ -70,7 +70,7 @@ export default function DevicesPage() {
             // فراخوانی API برای بررسی دستگاه
             const device = await api.CheckDevice(currentDeviceName.trim(), currentPassword.trim())
 
-            if (device) {
+            if (device !=undefined) {
                 setSelected(device)
             } else {
                 setError('دستگاه یافت نشد یا رمز عبور نادرست است')

src/lib/api.ts

@@ -58,7 +58,7 @@ async function http<T>(url: string, init?: RequestInit): Promise<T> {
 }
 
 export const api = {
-    CheckDevice: (deviceName: string, password: string) => http<boolean>(`${API_BASE}/api/devices/CheckDevice?deviceName=${deviceName}&password=${password}`),
+    CheckDevice: (deviceName: string, password: string) => http<DeviceDto>(`${API_BASE}/api/devices/CheckDevice?deviceName=${deviceName}&password=${password}`),
     listDevices: () => http<DeviceDto[]>(`${API_BASE}/api/devices`),
     createDevice: (dto: DeviceDto) => http<number>(`${API_BASE}/api/devices`, { method: 'POST', body: JSON.stringify(dto) }),
     listTelemetry: (q: { deviceId?: number; startUtc?: string; endUtc?: string; page?: number; pageSize?: number }) => {