feat: verbessere Onboarding-Workflow, verbessere mDNS-Discovery & ZNS-Import

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

frontend/core/network/src/commonMain/kotlin/at/mocode/frontend/core/network/discovery/NetworkDiscoveryService.kt

@@ -1,5 +1,7 @@
 package at.mocode.frontend.core.network.discovery
 
+import kotlinx.coroutines.flow.StateFlow
+
 /**
  * Modell für einen entdeckten Dienst im lokalen Netzwerk.
  */
@@ -16,6 +18,12 @@ data class DiscoveredService(
  */
 interface NetworkDiscoveryService {
     /**
+     * Ein StateFlow, der die aktuell entdeckten Dienste enthält.
+     * Ideal für reaktive UIs (Compose).
+     */
+    val discoveredServices: StateFlow<List<DiscoveredService>>
+
+  /**
      * Startet das Scannen nach verfügbaren Diensten im Netzwerk.
      */
     fun startDiscovery()
@@ -32,7 +40,7 @@ interface NetworkDiscoveryService {
     fun registerService(port: Int)
 
     /**
-     * Gibt die Liste der aktuell entdeckten Dienste zurück.
+     * Gibt die Liste der aktuell entdeckten Dienste zurück (Snapshot).
      */
     fun getDiscoveredServices(): List<DiscoveredService>
 }

frontend/core/network/src/jvmMain/kotlin/at/mocode/frontend/core/network/discovery/JmDnsDiscoveryService.kt

@@ -1,11 +1,14 @@
 package at.mocode.frontend.core.network.discovery
 
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import java.net.InetAddress
+import java.util.concurrent.ConcurrentHashMap
 import javax.jmdns.JmDNS
 import javax.jmdns.ServiceEvent
 import javax.jmdns.ServiceInfo
 import javax.jmdns.ServiceListener
-import java.net.InetAddress
-import java.util.concurrent.ConcurrentHashMap
 
 /**
  * JVM-spezifische Implementierung der Netzwerk-Discovery mittels JmDNS.
@@ -13,9 +16,12 @@ import java.util.concurrent.ConcurrentHashMap
 class JmDnsDiscoveryService : NetworkDiscoveryService {
 
     private var jmdns: JmDNS? = null
-    private val SERVICE_TYPE = "_meldestelle-biest._tcp.local."
+  private val SERVICE_TYPE = "_meldestelle._tcp.local."
     private val discoveredServicesMap = ConcurrentHashMap<String, DiscoveredService>()
 
+  private val _discoveredServices = MutableStateFlow<List<DiscoveredService>>(emptyList())
+  override val discoveredServices: StateFlow<List<DiscoveredService>> = _discoveredServices.asStateFlow()
+
     override fun startDiscovery() {
         if (jmdns == null) {
             jmdns = JmDNS.create(InetAddress.getLocalHost())
@@ -29,6 +35,7 @@ class JmDnsDiscoveryService : NetworkDiscoveryService {
 
             override fun serviceRemoved(event: ServiceEvent) {
                 discoveredServicesMap.remove(event.name)
+              _discoveredServices.value = discoveredServicesMap.values.toList()
                 println("[Discovery] Service entfernt: ${event.name}")
             }
 
@@ -41,6 +48,7 @@ class JmDnsDiscoveryService : NetworkDiscoveryService {
                     metadata = info.propertyNames.asSequence().associateWith { info.getPropertyString(it) }
                 )
                 discoveredServicesMap[event.name] = service
+              _discoveredServices.value = discoveredServicesMap.values.toList()
                 println("[Discovery] Service gefunden: ${service.name} @ ${service.host}:${service.port}")
             }
         })
@@ -50,6 +58,7 @@ class JmDnsDiscoveryService : NetworkDiscoveryService {
         jmdns?.close()
         jmdns = null
         discoveredServicesMap.clear()
+      _discoveredServices.value = emptyList()
     }
 
     override fun registerService(port: Int) {