fixing for compile

src/lib/devicePresence.ts

@@ -1,6 +1,16 @@
 const DEVICE_ID_KEY = "fpsms_device_id";
 const DISPLAY_NAME_KEY = "fpsms_device_display_name";
 
+/** Chromium User-Agent Client Hints (not in lib.dom Navigator yet). */
+interface NavigatorUAData {
+  mobile?: boolean;
+  platform?: string;
+}
+
+interface NavigatorWithUAData extends Navigator {
+  readonly userAgentData?: NavigatorUAData;
+}
+
 export function getOrCreateDeviceId(): string {
   if (typeof window === "undefined") return "";
   let id = localStorage.getItem(DEVICE_ID_KEY);
@@ -68,7 +78,7 @@ export function detectClientTypeFromUa(): string {
   }
 
   // User-Agent Client Hints (Chromium)
-  const uad = navigator.userAgentData;
+  const uad = (navigator as NavigatorWithUAData).userAgentData;
   if (uad) {
     const platform = uad.platform?.toLowerCase() ?? "";
     if (platform.includes("android")) {