Harden Windows DLP enforcement and Electron runtime packaging

scripts/native-tabs-smoke.cjs

@@ -1,4 +1,4 @@
-const {app,BrowserWindow,webContents}=require('electron');const assert=require('node:assert/strict'),fs=require('node:fs'),path=require('node:path');
+const {app,BrowserWindow,webContents}=require('electron');const assert=require('node:assert/strict'),fs=require('node:fs');
 app.setPath('userData',process.env.SAFETYNET_TABS_USERDATA);app.disableHardwareAcceleration();require('../apps/browser/main.cjs');
 function finish(code){for(const contents of webContents.getAllWebContents()){if(contents.getURL().endsWith('index.html'))continue;require('../apps/browser/page-clipboard-guard.cjs').disposePageClipboardGuard(contents);}app.exit(code);}
 const wait=ms=>new Promise(r=>setTimeout(r,ms));async function until(fn,label){for(let i=0;i<150;i++){if(await fn())return;await wait(100);}throw Error(label+' timed out');}