refactor: update backToPageMode logic for AiAssistantManagementHeader based on assistant type

apps/app/src/features/openai/client/components/AiAssistant/AiAssistantManagementModal/AiAssistantManagementKeywordSearch.tsx

@@ -132,7 +132,7 @@ export const AiAssistantKeywordSearch = (props: { updateBaseSelectedPages: (page
     <div className={moduleClass}>
       <AiAssistantManagementHeader
         backButtonColor="secondary"
-        backToPageMode={AiAssistantManagementModalPageMode.PAGE_SELECTION_METHOD}
+        backToPageMode={isNewAiAssistant ? AiAssistantManagementModalPageMode.PAGE_SELECTION_METHOD : AiAssistantManagementModalPageMode.PAGES}
         labelTranslationKey={isNewAiAssistant ? 'modal_ai_assistant.header.add_new_assistant' : 'modal_ai_assistant.header.update_assistant'}
       />
 

apps/app/src/features/openai/client/components/AiAssistant/AiAssistantManagementModal/AiAssistantManagementPageTreeSelection.tsx

@@ -125,7 +125,7 @@ export const AiAssistantManagementPageTreeSelection = (props: { updateBaseSelect
     <div className={moduleClass}>
       <AiAssistantManagementHeader
         backButtonColor="secondary"
-        backToPageMode={AiAssistantManagementModalPageMode.PAGE_SELECTION_METHOD}
+        backToPageMode={isNewAiAssistant ? AiAssistantManagementModalPageMode.PAGE_SELECTION_METHOD : AiAssistantManagementModalPageMode.PAGES}
         labelTranslationKey={isNewAiAssistant ? 'modal_ai_assistant.header.add_new_assistant' : 'modal_ai_assistant.header.update_assistant'}
       />