AeroToss v0.4.0: полная реализация M1-M4

- KMP проект: Kotlin 2.3.21, Compose 1.11.1, Gradle 8.13, AGP 8.13.2
- Обнаружение устройств: mDNS (JMDNS/Android NSD) + Wi-Fi Direct P2P
- Передача файлов: Java Socket, стриминг чанками, SHA-256 checksum
- UI: HomeScreen, SendScreen, ReceiveScreen, навигация
- Защита: санитизация имён файлов (path traversal)
- 65+ тестов (WireProtocol, Transfer, FileUtils, Wi-Fi Direct)

app/src/commonMain/kotlin/com/aerotoss/model/TransferProgress.kt

@@ -0,0 +1,35 @@
+package com.aerotoss.model
+
+enum class TransferState {
+    PENDING,
+    TRANSFERRING,
+    COMPLETED,
+    FAILED,
+    CANCELLED
+}
+
+data class TransferProgress(
+    val id: String,
+    val request: TransferRequest,
+    val bytesTransferred: Long,
+    val totalBytes: Long,
+    val state: TransferState,
+    val startTimeMs: Long = System.currentTimeMillis(),
+    val error: String? = null
+) {
+    val progress: Float
+        get() = if (totalBytes > 0) bytesTransferred.toFloat() / totalBytes else 0f
+
+    val isComplete: Boolean
+        get() = state == TransferState.COMPLETED
+
+    val speed: Long
+        get() {
+            if (state != TransferState.TRANSFERRING || bytesTransferred == 0L) return 0L
+            val elapsed = (System.currentTimeMillis() - startTimeMs).coerceAtLeast(1)
+            return bytesTransferred * 1000 / elapsed
+        }
+
+    val elapsedMs: Long
+        get() = System.currentTimeMillis() - startTimeMs
+}