chore: fix some crash and performance issues (#45)

Reviewed-on: #45

composeApp/src/androidMain/kotlin/su/reya/coop/screens/HomeScreen.kt

@@ -695,8 +695,7 @@ fun NewRequests(requests: List<Room>) {
 @Composable
 fun ChatRoom(room: Room, onClick: () -> Unit) {
     val profileCache = LocalProfileCache.current
-    val roomState by room.uiStateFlow(profileCache)
-        .collectAsStateWithLifecycle(RoomUiState())
+    val roomState by room.uiStateFlow(profileCache).collectAsStateWithLifecycle(RoomUiState())
 
     ListItem(
         modifier = Modifier.clickable(onClick = onClick),

composeApp/src/androidMain/kotlin/su/reya/coop/screens/NewChatScreen.kt

@@ -397,7 +397,7 @@ fun ContactListItem(
         supportingContent = { Text(text = pubkey.short()) },
         content = {
             Text(
-                text = profile?.name ?: "",
+                text = profile?.name ?: "Unknown",
                 style = MaterialTheme.typography.titleMediumEmphasized,
             )
         }