feat(macos): add attach-only launchd override

apps/macos/Sources/Clawdbot/DebugSettings.swift

@@ -16,6 +16,8 @@ struct DebugSettings: View {
     @State private var modelsError: String?
     private let gatewayManager = GatewayProcessManager.shared
     private let healthStore = HealthStore.shared
+    @State private var launchAgentWriteDisabled = GatewayLaunchAgentManager.isLaunchAgentWriteDisabled()
+    @State private var launchAgentWriteError: String?
     @State private var gatewayRootInput: String = GatewayProcessManager.shared.projectRootPath()
     @State private var sessionStorePath: String = SessionLoader.defaultStorePath
     @State private var sessionStoreSaveError: String?
@@ -47,6 +49,7 @@ struct DebugSettings: View {
             VStack(alignment: .leading, spacing: 14) {
                 self.header
 
+                self.launchdSection
                 self.appInfoSection
                 self.gatewaySection
                 self.logsSection
@@ -79,6 +82,39 @@ struct DebugSettings: View {
         }
     }
 
+    private var launchdSection: some View {
+        GroupBox("Gateway startup") {
+            VStack(alignment: .leading, spacing: 8) {
+                Toggle("Attach only (skip launchd install)", isOn: self.$launchAgentWriteDisabled)
+                    .onChange(of: self.launchAgentWriteDisabled) { _, newValue in
+                        self.launchAgentWriteError = GatewayLaunchAgentManager.setLaunchAgentWriteDisabled(newValue)
+                        if self.launchAgentWriteError != nil {
+                            self.launchAgentWriteDisabled = GatewayLaunchAgentManager.isLaunchAgentWriteDisabled()
+                            return
+                        }
+                        if newValue {
+                            Task {
+                                _ = await GatewayLaunchAgentManager.set(
+                                    enabled: false,
+                                    bundlePath: Bundle.main.bundlePath,
+                                    port: GatewayEnvironment.gatewayPort())
+                            }
+                        }
+                    }
+
+                Text("When enabled, Clawdbot won't install or manage \(gatewayLaunchdLabel). It will only attach to an existing Gateway.")
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+
+                if let launchAgentWriteError {
+                    Text(launchAgentWriteError)
+                        .font(.caption)
+                        .foregroundStyle(.red)
+                }
+            }
+        }
+    }
+
     private var header: some View {
         VStack(alignment: .leading, spacing: 6) {
             Text("Debug")