[bugfix] fix service worker opaqueredirect error and ensure SW controls page before mount (#6275)

Fixes service worker network error by handling opaqueredirect responses
correctly and ensures SW registration completes before app mount to
prevent race conditions on first load.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6275-bugfix-fix-service-worker-opaqueredirect-error-and-ensure-SW-controls-page-before-mount-2976d73d36508106bc65dc82cdc62779)
by [Unito](https://www.unito.io)

src/main.ts

@@ -83,8 +83,9 @@ app
   })
 
 // Register auth service worker after Pinia is initialized (cloud-only)
+// Wait for registration to complete before mounting to ensure SW controls the page
 if (isCloud) {
-  void import('@/platform/auth/serviceWorker')
+  await import('@/platform/auth/serviceWorker')
 }
 
 app.mount('#vue-app')

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) {
-  void import('./register')
+  await import('./register')
 }

src/platform/auth/serviceWorker/register.ts

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