[One Discover] Add AIAssistant prompts to logs overview detail (#204339)

## 📓 Summary

Closes #202191 

This work brings into the O11y solution contextual experience in
Discover the Logs AI Assistant prompts already adopted in LogStream and
Logs Explorer, which are now set for deprecation in favour of the unique
OneDiscover experience.

The AIAssistant is consumed by the `discover-shared` features registry,
which registers the features from the logs-shared plugin. Once the
codebase for LogStream and Logs Explorer that consume this component is
removed, it might make sense to do some clean-up and move the
LogsAIAssistant component implementation among the other contextual
components (log summary columns, etc...).


https://github.com/user-attachments/assets/f97d5a01-3896-4a86-9a3c-443151a9d04e

Co-authored-by: Marco Antonio Ghiani <marcoantonio.ghiani@elastic.co>

src/plugins/discover/public/context_awareness/profile_providers/observability/log_document_profile/accessors/get_doc_viewer.tsx

@@ -11,11 +11,18 @@ import { i18n } from '@kbn/i18n';
 import { UnifiedDocViewerLogsOverview } from '@kbn/unified-doc-viewer-plugin/public';
 import React from 'react';
 import type { DocumentProfileProvider } from '../../../../profiles';
+import { ProfileProviderServices } from '../../../profile_provider_services';
 
-export const getDocViewer: DocumentProfileProvider['profile']['getDocViewer'] =
-  (prev) => (params) => {
+export const createGetDocViewer =
+  (services: ProfileProviderServices): DocumentProfileProvider['profile']['getDocViewer'] =>
+  (prev) =>
+  (params) => {
     const prevDocViewer = prev(params);
 
+    const logsAIAssistantFeature = services.discoverShared.features.registry.getById(
+      'observability-logs-ai-assistant'
+    );
+
     return {
       ...prevDocViewer,
       docViewsRegistry: (registry) => {
@@ -25,7 +32,12 @@ export const getDocViewer: DocumentProfileProvider['profile']['getDocViewer'] =
             defaultMessage: 'Log overview',
           }),
           order: 0,
-          component: (props) => <UnifiedDocViewerLogsOverview {...props} />,
+          component: (props) => (
+            <UnifiedDocViewerLogsOverview
+              {...props}
+              renderAIAssistant={logsAIAssistantFeature?.render}
+            />
+          ),
         });
 
         return prevDocViewer.docViewsRegistry(registry);

src/plugins/discover/public/context_awareness/profile_providers/observability/log_document_profile/accessors/index.ts

@@ -7,4 +7,4 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
-export { getDocViewer } from './get_doc_viewer';
+export { createGetDocViewer } from './get_doc_viewer';

src/plugins/discover/public/context_awareness/profile_providers/observability/log_document_profile/profile.tsx

@@ -10,7 +10,7 @@
 import { DataTableRecord } from '@kbn/discover-utils';
 import { DocumentProfileProvider, DocumentType } from '../../../profiles';
 import { ProfileProviderServices } from '../../profile_provider_services';
-import { getDocViewer } from './accessors';
+import { createGetDocViewer } from './accessors';
 import { OBSERVABILITY_ROOT_PROFILE_ID } from '../consts';
 
 export const createObservabilityLogDocumentProfileProvider = (
@@ -18,7 +18,7 @@ export const createObservabilityLogDocumentProfileProvider = (
 ): DocumentProfileProvider => ({
   profileId: 'observability-log-document-profile',
   profile: {
-    getDocViewer,
+    getDocViewer: createGetDocViewer(services),
   },
   resolve: ({ record, rootContext }) => {
     if (rootContext.profileId !== OBSERVABILITY_ROOT_PROFILE_ID) {

x-pack/plugins/observability_solution/logs_shared/public/components/log_ai_assistant/log_ai_assistant.tsx

@@ -35,6 +35,12 @@ export const LogAIAssistant = ({
       return undefined;
     }
 
+    const message = doc.fields.find((field) => field.field === 'message')?.value[0];
+
+    if (!message) {
+      return undefined;
+    }
+
     return getContextualInsightMessages({
       message:
         'Can you explain what this log message means? Where it could be coming from, whether it is expected and whether it is an issue.',
@@ -53,6 +59,10 @@ export const LogAIAssistant = ({
 
     const message = doc.fields.find((field) => field.field === 'message')?.value[0];
 
+    if (!message) {
+      return undefined;
+    }
+
     return getContextualInsightMessages({
       message: `I'm looking at a log entry. Can you construct a Kibana KQL query that I can enter in the search bar that gives me similar log entries, based on the message field?`,
       instructions: JSON.stringify({
@@ -61,7 +71,9 @@ export const LogAIAssistant = ({
     });
   }, [getContextualInsightMessages, doc]);
 
-  return (
+  const hasAtLeastOnePrompt = Boolean(explainLogMessageMessages || similarLogMessageMessages);
+
+  return hasAtLeastOnePrompt ? (
     <EuiFlexGroup direction="column" gutterSize="m">
       {ObservabilityAIAssistantContextualInsight && explainLogMessageMessages ? (
         <EuiFlexItem grow={false}>
@@ -82,7 +94,7 @@ export const LogAIAssistant = ({
         </EuiFlexItem>
       ) : null}
     </EuiFlexGroup>
-  );
+  ) : null;
 };
 
 // eslint-disable-next-line import/no-default-export