## Summary
- Downgrading to Free tier is blocked server-side when an org has an
active branch, but the resulting error toast in `ExitSurveyModal.tsx`
used the default 4s toast duration, making it easy to miss.
- Adds `duration: 10_000, dismissible: true`, matching the pattern
already used for other important billing error toasts
(`org-subscription-update-mutation.ts`, `NewOrgForm.tsx`).
Fixes FE-3882
## Test plan
- [ ] Attempt to downgrade an org with an active branch to Free tier and
confirm the error toast stays visible for 10s and can be dismissed
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Bug Fixes**
* Improved the downgrade error message to stay visible longer and be
easier to dismiss, making failures clearer for users.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Ali Waseem
d949a19f97