fix(frontend): delete brain (#2101)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/brains-management/[brainId]/components/BrainManagementTabs/hooks/useBrainManagementTabs.ts

@@ -77,10 +77,10 @@ export const useBrainManagementTabs = () => {
       setCurrentBrainId(null);
       setIsDeleteOrUnsubscribeModalOpened(false);
       void fetchAllBrains();
-      router.push("/brains-management");
     } catch (error) {
       console.error("Error deleting brain: ", error);
     } finally {
+      router.push("/brains-management");
       setIsDeleteOrUnsubscribeRequestPending(false);
     }
   };