feat: Optimize DMG creation process by implementing staging image for improved efficiency

build/scripts/build_macos.sh

@@ -284,16 +284,28 @@ create_dmg() {
         
         # Create symlink to Applications folder
         ln -s /Applications "$DMG_TEMP/Applications"
-        
+
-        # Create DMG
+        # Build a small, HFS+ staging image first and then convert to
+        # compressed UDZO. This avoids oversized APFS container images.
+        STAGING_DMG="$TEMP_BUILD/${APP_NAME}-staging.dmg"
+        rm -f "$STAGING_DMG"
+
         hdiutil create \
             -volname "$DMG_VOLUME_NAME" \
             -srcfolder "$DMG_TEMP" \
+            -fs HFS+ \
+            -fsargs "-c c=64,a=16,e=16" \
+            -format UDRW \
             -ov \
+            "$STAGING_DMG"
+
+        hdiutil convert "$STAGING_DMG" \
             -format UDZO \
-            "$DMG_FILE"
+            -imagekey zlib-level=9 \
+            -o "$DMG_FILE"
         
         # Clean up
+        rm -f "$STAGING_DMG"
         rm -rf "$DMG_TEMP"
     fi