fix: disable npm native module rebuild in electron-builder

All production deps (sql.js, ws, xml2js, etc.) are pure JS or WASM —
none need native rebuilding for the Electron runtime. Disabling npmRebuild
skips the @electron/rebuild step that was failing to find
app-builder-lib/out/util/rebuild/remote-rebuild.js in CI.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/desktop/package.json

@@ -40,6 +40,7 @@
   "build": {
     "appId": "com.srsit.dibbywemomanager",
     "productName": "Dibby Wemo Manager",
+    "npmRebuild": false,
     "directories": {
       "output": "dist"
     },