feat: Enhance file upload logging and error handling in TransportManager and ChatViewModel

app/src/main/java/com/rosetta/messenger/network/TransportManager.kt

@@ -88,17 +88,22 @@ object TransportManager {
         val server = getActiveServer()
         
         Log.d(TAG, "📤 Uploading file: $id to $server")
+        Log.d(TAG, "📤 Content length: ${content.length}, first 50 chars: ${content.take(50)}")
         
         // Добавляем в список загрузок
         _uploading.value = _uploading.value + TransportState(id, 0)
         
         try {
+            // 🔥 КРИТИЧНО: Преобразуем строку в байты (как desktop делает new Blob([content]))
+            val contentBytes = content.toByteArray(Charsets.UTF_8)
+            Log.d(TAG, "📤 Content bytes length: ${contentBytes.size}")
+            
             val requestBody = MultipartBody.Builder()
                 .setType(MultipartBody.FORM)
                 .addFormDataPart(
                     "file",
                     id,
-                    content.toRequestBody("application/octet-stream".toMediaType())
+                    contentBytes.toRequestBody("application/octet-stream".toMediaType())
                 )
                 .build()
             
@@ -110,6 +115,8 @@ object TransportManager {
             val response = suspendCoroutine<Response> { cont ->
                 client.newCall(request).enqueue(object : Callback {
                     override fun onFailure(call: Call, e: IOException) {
+                        Log.e(TAG, "❌ Upload failed for $id: ${e.message}")
+                        Log.e(TAG, "❌ Stack trace: ${e.stackTraceToString()}")
                         cont.resumeWithException(e)
                     }
                     
@@ -120,12 +127,16 @@ object TransportManager {
             }
             
             if (!response.isSuccessful) {
+                val errorBody = response.body?.string() ?: "No error body"
+                Log.e(TAG, "❌ Upload failed: ${response.code}, body: $errorBody")
                 throw IOException("Upload failed: ${response.code}")
             }
             
             val responseBody = response.body?.string() 
                 ?: throw IOException("Empty response")
             
+            Log.d(TAG, "📤 Response body: $responseBody")
+            
             // Parse JSON response to get tag
             val tag = org.json.JSONObject(responseBody).getString("t")
             

app/src/main/java/com/rosetta/messenger/ui/chats/ChatViewModel.kt

@@ -1934,9 +1934,14 @@ class ChatViewModel(application: Application) : AndroidViewModel(application) {
                 var uploadTag = ""
                 
                 if (!isSavedMessages) {
-                    Log.d(TAG, "👤 📤 Uploading avatar to Transport Server...")
-                    uploadTag = TransportManager.uploadFile(avatarAttachmentId, encryptedAvatarBlob)
-                    Log.d(TAG, "👤 📤 Upload complete, tag: $uploadTag")
+                    try {
+                        Log.d(TAG, "👤 📤 Uploading avatar to Transport Server...")
+                        uploadTag = TransportManager.uploadFile(avatarAttachmentId, encryptedAvatarBlob)
+                        Log.d(TAG, "👤 📤 Upload complete, tag: $uploadTag")
+                    } catch (e: Exception) {
+                        Log.e(TAG, "👤 ❌ Failed to upload avatar to Transport Server", e)
+                        throw e
+                    }
                 }
                 
                 // Preview содержит tag::blurhash (как в desktop)