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## Summary by CodeRabbit
* **New Features**
* Added an on-demand mutation to refresh the current user's
subscriptions, syncing with RevenueCat when applicable and handling
Stripe-only cases.
* Subscription variant normalization for clearer plan information and
consistent results.
* **Tests**
* Added tests for refresh behavior: empty state, RevenueCat-backed
multi-step sync, and Stripe-only scenarios.
* **Client**
* New client operation to invoke the refresh mutation and retrieve
updated subscription fields.
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