feat: update build script

build.sh

@@ -2,7 +2,7 @@
 set -euo pipefail
 
 REPO="$(cd "$(dirname "$0")" && pwd)/build"
-APP="$HOME/Applications/Photon Uploader.app"
+APP="./out/Photon Uploader.app"
 CONTENTS="$APP/Contents"
 
 echo "==> Building PhotonUploader (menu bar binary)..."
@@ -41,4 +41,33 @@ echo "==> Signing..."
 codesign --force --sign - "$CONTENTS/Helpers/PhotonNotify.app"
 codesign --force --sign - "$APP"
 
-echo "==> Done. App installed at: $APP"
+echo "==> Done. App bundle at: $APP"
+
+echo "==> Creating DMG..."
+DMG_STAGING="./out/dmg-staging"
+DMG_OUT="./out/Photon Uploader.dmg"
+
+if ! command -v create-dmg &>/dev/null; then
+    echo "Error: create-dmg is not installed. Run: brew install create-dmg" >&2
+    exit 1
+fi
+
+rm -rf "$DMG_STAGING"
+mkdir -p "$DMG_STAGING"
+cp -r "$APP" "$DMG_STAGING/"
+
+rm -f "$DMG_OUT"
+create-dmg \
+    --volname "Photon Uploader" \
+    --volicon "$REPO/Resources/AppIcon.icns" \
+    --window-pos 200 120 \
+    --window-size 540 380 \
+    --icon-size 96 \
+    --icon "Photon Uploader.app" 140 190 \
+    --hide-extension "Photon Uploader.app" \
+    --app-drop-link 400 190 \
+    "$DMG_OUT" \
+    "$DMG_STAGING"
+
+rm -rf "$DMG_STAGING"
+echo "==> Done. DMG at: $DMG_OUT"