🐛 Fixed null poolTokenAddress issue

- Updated the code to handle cases where `poolTokenAddress` is null or undefined.
- Now, if `poolTokenAddress` is not available, it will default to `zeroAddress`. This prevents potential crashes and ensures smoother operation.

apps/web/components/Forms/PoolForm.tsx

@@ -414,7 +414,7 @@ export function PoolForm({ token, communityAddr }: Props) {
 
  writeCreatePool({
  args: [
- previewData.poolTokenAddress as Address,
+ (previewData.poolTokenAddress || zeroAddress) as Address,
  {
  cvParams: {
  decay: decay,