[bugfix] remove await from service worker registration to prevent blocking app mount

The await was causing the app to hang on deployment with a white screen
because the service worker registration promise was not resolving.

Changed back to void import() to allow the app to mount immediately
while service worker registration happens in the background.

src/platform/auth/serviceWorker/index.ts

@@ -5,5 +5,5 @@ import { isCloud } from '@/platform/distribution/types'
  * Tree-shaken for desktop/localhost builds via compile-time constant.
  */
 if (isCloud) {
-  await import('./register')
+  void import('./register')
 }

src/platform/auth/serviceWorker/register.ts

@@ -54,4 +54,4 @@ function setupCacheInvalidation(): void {
   })
 }
 
-await registerAuthServiceWorker()
+void registerAuthServiceWorker()