Draft: Add conversation persistence and history drawer

[onmete]

Summary

Draft PR for reference — demonstrates how conversation persistence and a history drawer can be implemented in the OLS console plugin.

• Session persistence: Stores the active conversation_id in localStorage; on page refresh, restores the last conversation by fetching its history from the OLS service (GET /v1/conversations/{id})
• Conversation history drawer: Integrates PatternFly's ChatbotConversationHistoryNav inside the Chatbot component, providing a searchable side panel to browse, switch between, and delete past conversations (GET /v1/conversations, DELETE /v1/conversations/{id})
• Layout preservation: The drawer is placed inside the Chatbot component (not wrapping it) to preserve the position: fixed floating overlay behavior

Files changed

File	Purpose
src/conversations.ts	New module: API calls (list/fetch/delete), response types, transformChatHistory, localStorage helpers
src/hooks/useConversationRestore.ts	New hook: restores last conversation from localStorage + OLS service on mount
src/components/GeneralPage.tsx	Integrates ChatbotConversationHistoryNav drawer with conversation list, search, select, delete, new chat
src/components/Popover.tsx	Gates first-time-user auto-open on conversation restore completion
src/components/Prompt.tsx	Saves conversation_id to localStorage on stream start event
src/redux-actions.ts	New actions: setConversations, removeConversation, setIsConversationsLoading
src/redux-reducers.ts	New state: conversations, isConversationsLoading + reducer cases
src/types.ts	New type: ConversationSummary
locales/en/plugin__lightspeed-console-plugin.json	New i18n strings for conversation history UI

Architecture notes

• ChatbotConversationHistoryNav must be a child of Chatbot, not a wrapper. Wrapping Chatbot in the drawer breaks the position: fixed overlay and causes the chat to render in normal document flow above the OKD console.
• Conversations are grouped by date (Today / Previous 7 days / Previous 30 days / Older) using last_message_timestamp from the OLS service.
• The useConversationRestore hook runs once on mount and signals completion via a boolean return, allowing dependent effects (like first-time-user auto-open) to wait.

Test plan

• Send a message, refresh the page — conversation should be restored automatically
• Open the conversation history drawer — all past conversations should be listed
• Search conversations by topic summary
• Select a different conversation — chat panel should switch to it
• Delete a conversation from the drawer menu
• Delete the active conversation — chat panel should clear
• Click "New chat" — should clear the panel and start fresh
• Verify the chat remains a floating overlay on the right (not pushing OKD console content down)

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[openshift-ci]

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