feat: add DMG build script and enhance README with installation instructions and Start at Login feature

apps/mac/AIWorkspace/README.md

@@ -28,6 +28,20 @@ Install to `~/Applications/AIWorkspace.app`:
 apps/mac/AIWorkspace/scripts/package-app.sh --install
 ```
 
+## Build a DMG
+
+```bash
+apps/mac/AIWorkspace/scripts/build-dmg.sh
+```
+
+This creates:
+
+```text
+apps/mac/AIWorkspace/dist/AIWorkspace.dmg
+```
+
+The DMG contains `AIWorkspace.app` and an `Applications` shortcut for drag-and-drop installation.
+
 One-step local install, optionally enabling start at login and opening the app:
 
 ```bash
@@ -36,7 +50,9 @@ apps/mac/AIWorkspace/scripts/install.sh --start-at-login --open
 
 ## Start at login
 
-After installing the app bundle:
+Preferred: open the installed app and use the **Start at Login** toggle in the UI. The app uses macOS `SMAppService` for login item registration.
+
+Development fallback after installing the app bundle:
 
 ```bash
 apps/mac/AIWorkspace/scripts/install-start-at-login.sh
@@ -74,4 +90,5 @@ swift run --package-path apps/mac/AIWorkspace AIWorkspace
 
 - This is not yet packaged as a signed `.app` bundle.
 - Start at login should be implemented later through a LaunchAgent or app login item.
+- Start at Login is available in the app UI through `SMAppService`. The LaunchAgent scripts are retained as development fallback utilities.
 - The app should remain a UI layer; service lifecycle remains in `scripts/aiw/services.py`.

apps/mac/AIWorkspace/Sources/main.swift

@@ -1,5 +1,6 @@
 import AppKit
 import Foundation
+import ServiceManagement
 import SwiftUI
 
 private let workspaceRoot = URL(fileURLWithPath: "/Users/david/Developer/fidelity-ai-workspace", isDirectory: true)
@@ -27,6 +28,7 @@ final class ServiceStatusModel: ObservableObject {
     @Published private(set) var report: StatusReport?
     @Published private(set) var lastError: String?
     @Published private(set) var lanIP: String?
+    @Published private(set) var loginItemStatus: SMAppService.Status = .notRegistered
     @Published private(set) var isRefreshing = false
 
     let profile: String
@@ -53,12 +55,42 @@ final class ServiceStatusModel: ObservableObject {
             let data = try await ServiceManager.run(["status", "--profile", profile, "--json"])
             report = try JSONDecoder().decode(StatusReport.self, from: data)
             lanIP = await NetworkInfo.primaryLANIP()
+            loginItemStatus = SMAppService.mainApp.status
             lastError = nil
         } catch {
             lastError = String(describing: error)
         }
     }
 
+    var startAtLoginEnabled: Bool {
+        loginItemStatus == .enabled
+    }
+
+    var startAtLoginStatusText: String {
+        switch loginItemStatus {
+        case .enabled: "enabled"
+        case .notRegistered: "off"
+        case .notFound: "not found"
+        case .requiresApproval: "requires approval"
+        @unknown default: "unknown"
+        }
+    }
+
+    func setStartAtLogin(_ enabled: Bool) {
+        do {
+            if enabled {
+                try SMAppService.mainApp.register()
+            } else {
+                try SMAppService.mainApp.unregister()
+            }
+            loginItemStatus = SMAppService.mainApp.status
+            lastError = nil
+        } catch {
+            loginItemStatus = SMAppService.mainApp.status
+            lastError = "Start at Login: \(error.localizedDescription)"
+        }
+    }
+
     func startProfile() {
         runAction(["start", "--profile", profile])
     }
@@ -219,6 +251,21 @@ struct ServiceMenuView: View {
 
             ActionButton(title: "Open Project Knowledge", systemImage: "books.vertical", action: model.openProjectKnowledge)
 
+            Divider()
+            VStack(alignment: .leading, spacing: 6) {
+                Toggle(isOn: Binding(
+                    get: { model.startAtLoginEnabled },
+                    set: { model.setStartAtLogin($0) }
+                )) {
+                    Label("Start at Login", systemImage: "poweron")
+                }
+                .toggleStyle(.switch)
+
+                Text("Login item: \(model.startAtLoginStatusText)")
+                    .font(.caption2)
+                    .foregroundStyle(.secondary)
+            }
+
             Divider()
             HStack {
                 if let error = model.lastError {

apps/mac/AIWorkspace/scripts/build-dmg.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+APP_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+APP_NAME="AIWorkspace"
+DIST_DIR="$APP_ROOT/dist"
+APP_BUNDLE="$DIST_DIR/$APP_NAME.app"
+DMG_STAGING="$DIST_DIR/dmg-staging"
+DMG_PATH="$DIST_DIR/$APP_NAME.dmg"
+
+bash "$SCRIPT_DIR/package-app.sh"
+
+rm -rf "$DMG_STAGING" "$DMG_PATH"
+mkdir -p "$DMG_STAGING"
+cp -R "$APP_BUNDLE" "$DMG_STAGING/$APP_NAME.app"
+ln -s /Applications "$DMG_STAGING/Applications"
+
+hdiutil create \
+  -volname "AI Workspace" \
+  -srcfolder "$DMG_STAGING" \
+  -ov \
+  -format UDZO \
+  "$DMG_PATH"
+
+rm -rf "$DMG_STAGING"
+echo "Built $DMG_PATH"

apps/mac/AIWorkspace/scripts/install.sh

@@ -22,10 +22,10 @@ for arg in "$@"; do
   esac
 done
 
-"$SCRIPT_DIR/package-app.sh" --install
+bash "$SCRIPT_DIR/package-app.sh" --install
 
 if [[ "$INSTALL_LOGIN_ITEM" == "1" ]]; then
-  "$SCRIPT_DIR/install-start-at-login.sh"
+  bash "$SCRIPT_DIR/install-start-at-login.sh"
 fi
 
 if [[ "$OPEN_APP" == "1" ]]; then