fix(inbox): Space Seer content above the timeline (#128301)

Seer CTA is a little too close to the timeline right now. 

Old:
<img width="758" height="197" alt="Screenshot 2026-10-20 at 3 17 56 PM"
src="https://github.com/user-attachments/assets/5d617b46-7f9c-4111-a67a-5f0c9069ae2d"
/>

New:
<img width="765" height="248" alt="Screenshot 2026-10-20 at 3 23 49 PM"
src="https://github.com/user-attachments/assets/638cd094-fc07-4851-9172-c8da12d2acab"
/>

Co-authored-by: Codex <codex@openai.com>

Author: cvxluo

static/app/views/issueList/pages/inbox/issuePreview/issuePreviewTimeline.tsx

@@ -1,5 +1,3 @@
-import {Fragment} from 'react';
-
 import {Stack} from '@sentry/scraps/layout';
 import {Heading} from '@sentry/scraps/text';
 
@@ -91,7 +89,7 @@ export function IssuePreviewTimeline({
   });
 
   return (
-    <Fragment>
+    <Stack gap="2xl">
       <IssuePreviewSeerContent
         group={group}
         project={project}
@@ -121,6 +119,6 @@ export function IssuePreviewTimeline({
           />
         </ErrorBoundary>
       </Stack>
-    </Fragment>
+    </Stack>
   );
 }