## Summary
Refactored `onUserResolved` function in auth composable to use VueUse
`whenever` utility instead of manual watch implementation and use
`immediate` option instead of invoking manually before creating watcher.
## Changes
- **What**: Replaced manual watch + immediate check pattern with [VueUse
whenever](https://vueuse.org/shared/whenever/) utility in
`useCurrentUser.ts:37`
## Review Focus
Behavioral equivalence verification - `whenever` with `immediate: true`
should maintain identical callback timing and cleanup semantics.
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5718-refactor-Simplify-current-user-resolved-hook-implementation-2766d73d365081008b6de156dd78f940)
by [Unito](https://www.unito.io)
