diff --git a/src/ClaudeDo.Ui/Design/IslandStyles.axaml b/src/ClaudeDo.Ui/Design/IslandStyles.axaml
index 5d391407..59a9c035 100644
--- a/src/ClaudeDo.Ui/Design/IslandStyles.axaml
+++ b/src/ClaudeDo.Ui/Design/IslandStyles.axaml
@@ -57,8 +57,8 @@
     <!-- Icon.Search -->
     <StreamGeometry x:Key="Icon.Search">M11 4a7 7 0 1 0 0 14A7 7 0 0 0 11 4z M20 20l-3.5-3.5</StreamGeometry>
 
-    <!-- Icon.Plus -->
-    <StreamGeometry x:Key="Icon.Plus">M12 5v14M5 12h14</StreamGeometry>
+    <!-- Icon.Plus — filled cross (PathIcon fills, so a stroke-only plus renders invisible) -->
+    <StreamGeometry x:Key="Icon.Plus">M10.6 5 H13.4 V10.6 H19 V13.4 H13.4 V19 H10.6 V13.4 H5 V10.6 H10.6 Z</StreamGeometry>
 
     <!-- Icon.MoreHorizontal (three filled dots) — uses fill so rendered via PathIcon with fill brush -->
     <StreamGeometry x:Key="Icon.MoreHorizontal">M5 12m-1.3 0a1.3 1.3 0 1 0 2.6 0 1.3 1.3 0 1 0-2.6 0 M12 12m-1.3 0a1.3 1.3 0 1 0 2.6 0 1.3 1.3 0 1 0-2.6 0 M19 12m-1.3 0a1.3 1.3 0 1 0 2.6 0 1.3 1.3 0 1 0-2.6 0</StreamGeometry>
diff --git a/src/ClaudeDo.Ui/Views/Islands/Detail/TaskHeaderBar.axaml b/src/ClaudeDo.Ui/Views/Islands/Detail/TaskHeaderBar.axaml
index 77ac818f..0ae45e5c 100644
--- a/src/ClaudeDo.Ui/Views/Islands/Detail/TaskHeaderBar.axaml
+++ b/src/ClaudeDo.Ui/Views/Islands/Detail/TaskHeaderBar.axaml
@@ -65,7 +65,7 @@
             IsEnabled="{Binding AgentSettings.IsEnabled}"
             VerticalAlignment="Top"
             Margin="6,0,0,0">
-      <TextBlock Text="⚙" FontSize="{StaticResource FontSizeTaskTitle}"/>
+      <PathIcon Data="{StaticResource Icon.Settings}" Width="15" Height="15"/>
       <Button.Flyout>
         <Flyout Placement="BottomEdgeAlignedRight" ShowMode="Standard">
           <StackPanel Width="340" Spacing="10" Margin="4">