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

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