fix(macos): stabilize onboarding discovery

apps/macos/Sources/Clawdbot/OnboardingView+Layout.swift

@@ -173,6 +173,24 @@ extension OnboardingView {
                 .shadow(color: .black.opacity(0.06), radius: 8, y: 3))
     }
 
+    func onboardingGlassCard(
+        spacing: CGFloat = 12,
+        padding: CGFloat = 16,
+        @ViewBuilder _ content: () -> some View) -> some View
+    {
+        VStack(alignment: .leading, spacing: spacing) {
+            content()
+        }
+        .padding(padding)
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .background(
+            RoundedRectangle(cornerRadius: 16, style: .continuous)
+                .fill(.ultraThinMaterial)
+                .overlay(
+                    RoundedRectangle(cornerRadius: 16, style: .continuous)
+                        .strokeBorder(Color.white.opacity(0.10), lineWidth: 1)))
+    }
+
     func featureRow(title: String, subtitle: String, systemImage: String) -> some View {
         HStack(alignment: .top, spacing: 12) {
             Image(systemName: systemImage)