feat: unterstütze Einzeldatei-Import, verbessere Fortschrittsanzeige und Logging im ZNS-Import

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

frontend/features/zns-import-feature/src/jvmMain/kotlin/at/mocode/zns/feature/ZnsImportViewModel.kt

@@ -30,9 +30,9 @@ data class ImportStartResponse(val jobId: String)
 internal data class JobStatusResponse(
   val jobId: String,
   val status: String,
-  val progress: Int = 0,
-  val progressDetail: String = "",
-  val errors: List<String> = emptyList(),
+  val fortschritt: Int = 0,
+  val meldungen: List<String> = emptyList(),
+  val fehler: List<String> = emptyList(),
 )
 
 private val TERMINAL_STATES = setOf("ABGESCHLOSSEN", "FEHLER")
@@ -111,9 +111,9 @@ class ZnsImportViewModel(
             val status = json.decodeFromString<JobStatusResponse>(response.bodyAsText())
             state = state.copy(
               jobStatus = status.status,
-              progress = status.progress,
-              progressDetail = status.progressDetail,
-              errors = status.errors.takeLast(MAX_VISIBLE_ERRORS),
+              progress = status.fortschritt,
+              progressDetail = status.meldungen.lastOrNull() ?: "",
+              errors = status.fehler.takeLast(MAX_VISIBLE_ERRORS),
               isFinished = status.status in TERMINAL_STATES,
             )
             if (status.status in TERMINAL_STATES) break