[8.x] [Obs ai assistant] - bug bulk import for knowledge base (#205075)…

… (#205688)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[Obs ai assistant] - bug bulk import for knowledge base
(#205075)](#205075)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Arturo
Lidueña","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-01-07T09:44:16Z","message":"[Obs
ai assistant] - bug bulk import for knowledge base (#205075)\n\nCloses
#196096 \r\n\r\n## Summary\r\n\r\nWrong successful message with error
notification pop up on adding a\r\nwrong format file under bulk import
for knowledge
base\r\n[#196096](https://github.com/elastic/kibana/issues/196096)\r\n\r\n---------\r\n\r\nCo-authored-by:
Søren Louv-Jansen <[email protected]>\r\nCo-authored-by: kibanamachine
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ai assistant] - bug bulk import for knowledge
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ai assistant] - bug bulk import for knowledge base (#205075)\n\nCloses
#196096 \r\n\r\n## Summary\r\n\r\nWrong successful message with error
notification pop up on adding a\r\nwrong format file under bulk import
for knowledge
base\r\n[#196096](https://github.com/elastic/kibana/issues/196096)\r\n\r\n---------\r\n\r\nCo-authored-by:
Søren Louv-Jansen <[email protected]>\r\nCo-authored-by: kibanamachine
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ai assistant] - bug bulk import for knowledge base (#205075)\n\nCloses
#196096 \r\n\r\n## Summary\r\n\r\nWrong successful message with error
notification pop up on adding a\r\nwrong format file under bulk import
for knowledge
base\r\n[#196096](https://github.com/elastic/kibana/issues/196096)\r\n\r\n---------\r\n\r\nCo-authored-by:
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BACKPORT-->

Co-authored-by: Arturo Lidueña <[email protected]>

x-pack/solutions/observability/plugins/observability_ai_assistant_management/public/routes/components/knowledge_base_bulk_import_flyout.tsx

@@ -47,13 +47,18 @@ export function KnowledgeBaseBulkImportFlyout({ onClose }: { onClose: () => void
   };
 
   const handleSubmitNewEntryClick = async () => {
-    let entries: Array<Omit<KnowledgeBaseEntry, '@timestamp' | 'title'> & { title: string }> = [];
     const text = await files[0].text();
 
     const elements = text.split('\n').filter(Boolean);
 
     try {
-      entries = elements.map((el) => JSON.parse(el));
+      const entries = elements.map(
+        (el) =>
+          JSON.parse(el) as Omit<KnowledgeBaseEntry, '@timestamp' | 'title'> & {
+            title: string;
+          }
+      );
+      await mutateAsync({ entries });
     } catch (_) {
       toasts.addError(
         new Error(
@@ -74,8 +79,7 @@ export function KnowledgeBaseBulkImportFlyout({ onClose }: { onClose: () => void
         }
       );
     }
-
-    mutateAsync({ entries }).then(onClose);
+    onClose();
   };
 
   return (