[Bug] Pool deposit modal does not refresh pool data after successful deposit

## Description
After a successful deposit, the pool page still shows the old share count until manual page refresh.

## Current behavior
Pool data is not invalidated/refetched after deposit.

## Expected behavior
Refetch pool data after successful deposit to show updated shares.

## Files
- components/modals/DepositModal.tsx
- hooks/usePools.ts

## Impact
Stale data shown to user after action.