Issue: DIY Downloader package is missing files and breaks on localhost - Windows 11 and WSL2

[serviteur]

Thanks for this project.

The DIY Downloader (bim-ootb-install.bat / .sh) advertised on the live site runs to completion, but the resulting self-hosted viewer never initializes. Page shows only the title "BIM OOTB — Frictionless BIM" and a stuck 0:00 timer. Reproduced on Windows 11 and WSL2 / Xubuntu 24.04.04 LTS, in Chrome.

Three issues found

1. Five JS files are missing from the GitHub package

BIMCompiler-full/deploy/dev/ is missing files that index.html references — they 404 on every load:

"GET /loader.js?v=3" → 404
"GET /config.js?v=3" → 404
"GET /tools.js?v=5" → 404
"GET /measure.js?v=3" → 404
"GET /excel.js?v=4" → 404
"GET /manifest.webmanifest" → 404
"GET /favicon.ico" → 404

The live site evidently serves these from elsewhere, but the GitHub full branch doesn't include them.

2. Service worker breaks the app on http://localhost

sw.js registers on localhost and intercepts fetches, which then fail:

Uncaught (in promise) TypeError: Failed to fetch at sw.js?v=243:93:12

Suggested fix — skip registration on localhost:

```javascript
if ('serviceWorker' in navigator
    && location.hostname !== 'localhost'
    && location.hostname !== '127.0.0.1') {
  navigator.serviceWorker.register('sw.js?v=243')...
}

### 3. Syntax error in `bim-ootb-install.sh` aborts the install on Linux

```bash
`elif command -v xdg-open &>/dev/null; then xdg-open http://localhost:8080 &; fi`

&; is invalid bash. Combined with set -e, the script silently exits before python3 -m http.server 8080 ever runs. Fix:

`elif command -v xdg-open &>/dev/null; then xdg-open http://localhost:8080 & fi`