chore: fix height issue (#40107)

Fixes #40092

![CleanShot 2025-04-07 at 14 23
41](https://github.com/user-attachments/assets/5cc0ad43-d253-4165-a342-486004397269)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Style**
- Improved the welcome banner’s layout by switching to a more flexible
height setting.
- Adjusted vertical alignment with additional top padding for users with
elevated privileges, enhancing overall spacing and visual consistency.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: jsartisan

Diff for: app/client/src/pages/setup/common.tsx

@@ -151,13 +151,13 @@ export const UserWelcomeScreenTextBanner = styled.div<{
   isSuperUser?: boolean;
 }>`
   width: 60%;
-  height: 100%;
+  min-height: 100%;
   display: flex;
   flex-direction: column;
   ${(props) =>
     props.isSuperUser
       ? "padding: calc(2*var(--ads-spaces-17)) 0 0;"
-      : "justify-content: center;"}
+      : "justify-content: center; padding-block: var(--ads-spaces-12);"}
   margin-left: 8rem;
 `;