AeroToss v0.5.0: финальный аудит, багфиксы, тесты, релиз

- Исправлен cleanup файлов (catch-блок удаляет реальный файл)
- Null safety для NsdManager (as? с проверками)
- JSON парсер: isLenient = false (отвергает malformed JSON)
- ByteArray.toInt(): добавлена require(size >= 4)
- Исправлен typo в SendScreen
- TransferEdgeCaseTest: 8 новых тестов edge cases
- Собран macOS arm64 JAR (28 МБ)
- Итого 73+ тестов, все проходят

app/src/androidMain/kotlin/com/aerotoss/transfer/AndroidTransferManager.kt

@@ -78,6 +78,8 @@ class AndroidFileTransferManager(private val context: Context) : TransferManager
     private suspend fun handleIncomingConnection(socket: Socket) {
         withContext(Dispatchers.IO) {
             val progressId = UUID.randomUUID().toString()
+            var actualFile: File? = null
+            var requestFileName: String = ""
             try {
                 socket.use { sock ->
                     sock.soTimeout = 30_000
@@ -86,6 +88,7 @@ class AndroidFileTransferManager(private val context: Context) : TransferManager
 
                     val requestJson = input.readUTF()
                     val request = Json.decodeFromString<TransferRequest>(requestJson)
+                    requestFileName = request.fileName
 
                     val progress = TransferProgress(
                         id = progressId,
@@ -105,6 +108,7 @@ class AndroidFileTransferManager(private val context: Context) : TransferManager
                     }
 
                     val file = FileUtils.resolveUniqueFile(downloadsDir, request.fileName)
+                    actualFile = file
                     val sha256 = MessageDigest.getInstance("SHA-256")
                     var bytesWritten = 0L
 
@@ -157,11 +161,11 @@ class AndroidFileTransferManager(private val context: Context) : TransferManager
                 }
             } catch (e: Exception) {
                 e.printStackTrace()
+                actualFile?.let { FileUtils.deleteIfExists(it) }
                 val current = _incomingTransfers.value.find { it.id == progressId }
                 if (current != null && current.state != TransferState.COMPLETED &&
                     current.state != TransferState.FAILED && current.state != TransferState.CANCELLED
                 ) {
-                    FileUtils.deleteIfExists(File(downloadsDir, FileUtils.sanitizeFileName(current.request.fileName)))
                     updateIncomingById(progressId, current.copy(
                         state = TransferState.FAILED,
                         error = e.message ?: "Unknown error"