Show per-node loading spinner during speed test

app/src/main/java/com/sing/vpn/ui/components/NodeRow.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -26,6 +27,7 @@ fun NodeRow(
     node: Node,
     isActive: Boolean,
     delay: Int?,
+    isTesting: Boolean = false,
     onClick: () -> Unit,
     onLongClick: () -> Unit,
     modifier: Modifier = Modifier
@@ -67,8 +69,14 @@ fun NodeRow(
             )
         }
 
-        // Delay
-        if (delay != null) {
+        // Delay or loading
+        if (isTesting) {
+            CircularProgressIndicator(
+                modifier = Modifier.size(16.dp),
+                strokeWidth = 2.dp,
+                color = TextTertiary
+            )
+        } else if (delay != null) {
             val (text, color) = when {
                 delay <= 0 -> stringResource(R.string.timeout) to Red
                 delay < 300 -> "${delay}ms" to Green

app/src/main/java/com/sing/vpn/ui/screens/NodesScreen.kt

@@ -271,6 +271,7 @@ fun NodesScreen(modifier: Modifier = Modifier) {
                         node = node,
                         isActive = node.active,
                         delay = delays[NodeTester.nodeTag(node)],
+                        isTesting = isTesting,
                         onClick = { selectNode(node.id) },
                         onLongClick = { showNodeSheet = node }
                     )