better threading

app/src/main/java/com/example/fluffytrix/ui/screens/main/MainViewModel.kt

@@ -181,7 +181,7 @@ class MainViewModel(
         MxcUrlHelper.mxcToThumbnailUrl(baseUrl, mxcUri, size)
 
     init {
-        viewModelScope.launch {
+        viewModelScope.launch(Dispatchers.IO) {
             syncService = authRepository.getOrStartSync()
             loadRooms()
         }
@@ -198,7 +198,7 @@ class MainViewModel(
     private fun loadRooms() {
         val client = authRepository.getClient() ?: return
         roomPollJob?.cancel()
-        roomPollJob = viewModelScope.launch {
+        roomPollJob = viewModelScope.launch(Dispatchers.IO) {
             // Poll until rooms appear, then keep polling for updates
             while (true) {
                 try {
@@ -403,7 +403,7 @@ class MainViewModel(
 
     private fun loadChannelName(roomId: String) {
         val client = authRepository.getClient() ?: return
-        viewModelScope.launch {
+        viewModelScope.launch(Dispatchers.IO) {
             try {
                 val room = client.getRoom(roomId)
                 val name = room?.displayName() ?: roomId
@@ -415,7 +415,7 @@ class MainViewModel(
 
     private fun loadTimeline(roomId: String): Job {
         val client = authRepository.getClient() ?: return Job()
-        return viewModelScope.launch {
+        return viewModelScope.launch(Dispatchers.IO) {
             try {
                 val room = client.getRoom(roomId) ?: return@launch
                 val timeline = room.timeline()
@@ -691,7 +691,7 @@ class MainViewModel(
 
     private fun loadMembers(roomId: String): Job {
         val client = authRepository.getClient() ?: return Job()
-        return viewModelScope.launch {
+        return viewModelScope.launch(Dispatchers.IO) {
             try {
                 val room = client.getRoom(roomId) ?: return@launch
                 val iterator = room.members()
@@ -749,7 +749,7 @@ class MainViewModel(
 
     fun sendMessage(body: String) {
         val timeline = activeTimeline ?: return
-        viewModelScope.launch {
+        viewModelScope.launch(Dispatchers.IO) {
             try {
                 timeline.send(messageEventContentFromMarkdown(body))
             } catch (_: Exception) { }
@@ -829,7 +829,7 @@ class MainViewModel(
 
     private fun preloadAllSpaceChildren() {
         val client = authRepository.getClient() ?: return
-        viewModelScope.launch {
+        viewModelScope.launch(Dispatchers.IO) {
             try {
                 val spaceService = client.spaceService()
                 val map = mutableMapOf<String, Set<String>>()
@@ -913,7 +913,7 @@ class MainViewModel(
             return
         }
         val client = authRepository.getClient() ?: return
-        viewModelScope.launch {
+        viewModelScope.launch(Dispatchers.IO) {
             try {
                 val spaceService = client.spaceService()
                 val allSpacedRoomIds = mutableSetOf<String>()
@@ -965,7 +965,7 @@ class MainViewModel(
             return
         }
         val client = authRepository.getClient() ?: return
-        viewModelScope.launch {
+        viewModelScope.launch(Dispatchers.IO) {
             try {
                 val spaceService = client.spaceService()
                 val allRoomIds = mutableSetOf<String>()