fix: address config settings viewbuilder updates

apps/macos/Sources/Clawdbot/ConfigSettings.swift

@@ -27,8 +27,8 @@ struct ConfigSettings: View {
             await self.store.loadConfig()
         }
         .onAppear { self.ensureSelection() }
-        .onChange(of: self.store.configSchema) { _, _ in
-            self.ensureSelection()
+        .onChange(of: self.store.configSchemaLoading) { _, loading in
+            if !loading { self.ensureSelection() }
         }
     }
 }
@@ -215,7 +215,9 @@ extension ConfigSettings {
     @ViewBuilder
     private func subsectionNav(_ section: ConfigSection) -> some View {
         let subsections = self.resolveSubsections(for: section)
-        guard !subsections.isEmpty else { return }
+        if subsections.isEmpty {
+            EmptyView()
+        } else {
             ScrollView(.horizontal, showsIndicators: false) {
                 HStack(spacing: 8) {
                     self.subsectionButton(
@@ -236,6 +238,7 @@ extension ConfigSettings {
                 .padding(.vertical, 2)
             }
         }
+    }
 
     private func subsectionButton(
         title: String,