* Add Electron wrapper for running bundle as desktop app
* Fix Electron wrapper Node runtime mismatch with NodeCG
* Bump Electron wrapper to 39.5.1 and update docs
* Clarify runtime behavior in troubleshooting docs
* Make electron npm scripts cross-platform with cross-env
* Default NodeCG launch to system Node; keep Electron-node as opt-in
* Add Electron better-sqlite3 rebuild scripts for ABI issues
* Update default Electron URL to dashboard standalone example