style(android): use tonal surfaces for overlays

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/RootScreen.kt

@@ -19,6 +19,8 @@ import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.FilledTonalIconButton
 import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButtonDefaults
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.material.icons.Icons
@@ -125,6 +127,11 @@ private fun OverlayIconButton(
   FilledTonalIconButton(
     onClick = onClick,
     modifier = Modifier.size(44.dp),
+    colors =
+      IconButtonDefaults.filledTonalIconButtonColors(
+        containerColor = MaterialTheme.colorScheme.surfaceContainerHigh,
+        contentColor = MaterialTheme.colorScheme.onSurface,
+      ),
   ) {
     icon()
   }

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/StatusPill.kt

@@ -1,6 +1,5 @@
 package com.steipete.clawdis.node.ui
 
-import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -36,9 +35,9 @@ fun StatusPill(
     onClick = onClick,
     modifier = modifier,
     shape = RoundedCornerShape(14.dp),
-    color = MaterialTheme.colorScheme.surfaceContainer.copy(alpha = 0.92f),
-    shadowElevation = 3.dp,
-    border = BorderStroke(0.5.dp, Color.White.copy(alpha = 0.10f)),
+    color = MaterialTheme.colorScheme.surfaceContainerHigh,
+    tonalElevation = 3.dp,
+    shadowElevation = 0.dp,
   ) {
     Row(
       modifier = Modifier.padding(horizontal = 12.dp, vertical = 8.dp),