android/ui: add back fast user switching status and clean up avatar scaling

Updates #cleanup

Signed-off-by: Percy Wegmann <percy@tailscale.com>

android/src/main/java/com/tailscale/ipn/ui/util/Lists.kt

@@ -44,7 +44,7 @@ inline fun <T> LazyListScope.itemsWithDividers(
         key = if (key != null) { index: Int -> key(items[index]) } else null,
         contentType = { index -> contentType(items[index]) }) {
           if (forceLeading && it == 0 ||
-              forceTrailing && it == items.size - 1 ||
+              forceTrailing && it == items.size ||
               it > 0 && it < items.size) {
             Lists.ItemDivider()
           }

android/src/main/java/com/tailscale/ipn/ui/view/Avatar.kt

@@ -36,7 +36,8 @@ fun Avatar(profile: IpnLocal.LoginProfile?, size: Int = 50) {
             modifier = Modifier.size((size * .8f).dp))
 
         profile?.UserProfile?.ProfilePicURL?.let { url ->
-          AsyncImage(model = url, contentDescription = null)
+          AsyncImage(
+              model = url, modifier = Modifier.size((size * 1.2f).dp), contentDescription = null)
         }
       }
 }

android/src/main/java/com/tailscale/ipn/ui/view/UserSwitcherView.kt

@@ -5,10 +5,9 @@ package com.tailscale.ipn.ui.view
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Scaffold
 import androidx.compose.runtime.Composable
@@ -19,8 +18,9 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.tailscale.ipn.R
+import com.tailscale.ipn.ui.util.Lists
+import com.tailscale.ipn.ui.util.itemsWithDividers
 import com.tailscale.ipn.ui.util.set
-import com.tailscale.ipn.ui.util.settingsRowModifier
 import com.tailscale.ipn.ui.viewModel.UserSwitcherViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -39,17 +39,16 @@ fun UserSwitcherView(nav: BackNavigation, viewModel: UserSwitcherViewModel = vie
           // Show the error overlay if need be
           showDialog?.let { ErrorDialog(type = it, action = { viewModel.showDialog.set(null) }) }
 
-          Column(modifier = settingsRowModifier()) {
+          // When switch is invoked, this stores the ID of the user we're trying to switch to
+          // so we can decorate it with a spinner.  The actual logged in user will not change
+          // until
+          // we get our first netmap update back with the new userId for SelfNode.
+          // (jonathan) TODO: This user switch is not immediate.  We may need to represent the
+          // "switching users" state globally (if ipnState is insufficient)
+          val nextUserId = remember { mutableStateOf<String?>(null) }
 
-            // When switch is invoked, this stores the ID of the user we're trying to switch to
-            // so we can decorate it with a spinner.  The actual logged in user will not change
-            // until
-            // we get our first netmap update back with the new userId for SelfNode.
-            // (jonathan) TODO: This user switch is not immediate.  We may need to represent the
-            // "switching users" state globally (if ipnState is insufficient)
-            val nextUserId = remember { mutableStateOf<String?>(null) }
-
-            users?.forEach { user ->
+          LazyColumn {
+            itemsWithDividers(users ?: emptyList()) { user ->
               if (user.ID == currentUser?.ID) {
                 UserView(profile = user, actionState = UserActionState.CURRENT)
               } else {
@@ -70,14 +69,15 @@ fun UserSwitcherView(nav: BackNavigation, viewModel: UserSwitcherViewModel = vie
                     })
               }
             }
-            SettingRow(viewModel.addProfileSetting)
-          }
 
-          Spacer(modifier = Modifier.height(8.dp))
-
-          Column(modifier = settingsRowModifier()) {
-            SettingRow(viewModel.loginSetting)
-            SettingRow(viewModel.logoutSetting)
+            item {
+              Lists.SectionDivider()
+              SettingRow(viewModel.addProfileSetting)
+              Lists.ItemDivider()
+              SettingRow(viewModel.loginSetting)
+              Lists.ItemDivider()
+              SettingRow(viewModel.logoutSetting)
+            }
           }
         }
   }

android/src/main/java/com/tailscale/ipn/ui/view/UserView.kt

@@ -6,16 +6,11 @@ package com.tailscale.ipn.ui.view
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Box
 import androidx.compose.material3.ListItem
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.dp
 import com.tailscale.ipn.R
 import com.tailscale.ipn.ui.model.IpnLocal
 
@@ -50,7 +45,14 @@ fun UserView(
           supportingContent = {
             Text(text = profile.Name, style = MaterialTheme.typography.bodyMedium)
           },
-      )
+          trailingContent = {
+            when (actionState) {
+              UserActionState.CURRENT -> CheckedIndicator()
+              UserActionState.SWITCHING -> SimpleActivityIndicator(size = 26)
+              UserActionState.NAV -> Unit
+              UserActionState.NONE -> Unit
+            }
+          })
     }
         ?: run {
           ListItem(