chore: implementiere Zustandsprüfung für DiscoveryService und ConnectivityTracker, verbessere Plug-and-Play-Kompatibilität und optimiere LAN-Discovery

Signed-off-by: StefanMoCoAt <stefan.mo.co@gmail.com>

frontend/core/network/src/commonMain/kotlin/at/mocode/frontend/core/network/ConnectivityTracker.kt

@@ -21,11 +21,8 @@ class ConnectivityTracker : KoinComponent {
 
   private val scope = CoroutineScope(Dispatchers.Default + SupervisorJob())
 
-  init {
-    startTracking()
-  }
-
-  private fun startTracking() {
+  fun startTracking() {
+    if (scope.isActive && _isOnline.value) return // Bereits aktiv (Dummy-Check)
     scope.launch {
       while (isActive) {
         _isOnline.value = checkConnection()