feat(zns-import): DAT-Dateisupport hinzugefügt, Fehlerbehebung und UI-Anpassungen

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

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

@@ -24,7 +24,7 @@ import kotlin.time.Duration.Companion.milliseconds
 
 
 @Serializable
-internal data class JobIdResponse(val jobId: String)
+data class ImportStartResponse(val jobId: String)
 
 @Serializable
 internal data class JobStatusResponse(
@@ -57,8 +57,12 @@ class ZnsImportViewModel(
   override fun startImport(mode: String) {
     val filePath = state.selectedFilePath ?: return
     val file = File(filePath)
-    if (!file.exists() || !file.name.endsWith(".zip", ignoreCase = true)) {
-      state = state.copy(errorMessage = "Bitte eine gültige .zip-Datei auswählen.")
+    if (!file.exists() || !(file.name.endsWith(".zip", ignoreCase = true) || file.name.endsWith(
+        ".dat",
+        ignoreCase = true
+      ))
+    ) {
+      state = state.copy(errorMessage = "Bitte eine gültige .zip oder .dat-Datei auswählen.")
       return
     }
 
@@ -72,15 +76,17 @@ class ZnsImportViewModel(
         val response: HttpResponse = httpClient.post("${NetworkConfig.baseUrl}/api/v1/import/zns") {
           parameter("mode", mode)
           if (token != null) header(HttpHeaders.Authorization, "Bearer $token")
+          val contentType =
+            if (file.name.endsWith(".zip", ignoreCase = true)) "application/zip" else "application/octet-stream"
           setBody(MultiPartFormDataContent(formData {
             append("file", file.readBytes(), Headers.build {
               append(HttpHeaders.ContentDisposition, "filename=\"${file.name}\"")
-              append(HttpHeaders.ContentType, "application/zip")
+              append(HttpHeaders.ContentType, contentType)
             })
           }))
         }
         if (response.status == HttpStatusCode.Accepted) {
-          val body = json.decodeFromString<JobIdResponse>(response.bodyAsText())
+          val body = json.decodeFromString<ImportStartResponse>(response.bodyAsText())
           state = state.copy(isUploading = false, jobId = body.jobId, jobStatus = "AUSSTEHEND")
           startPolling(body.jobId)
         } else {