- Removed duplicate stores/chat.ts (old store)
- Consolidated to features/chat/store/chatStore.ts (active store)
- Updated ChatMessages.tsx to use feature store (currentConversationId + lookup)
- Updated storeSelectors.ts to use feature store and export only existing methods
- Updated stateHydration.ts to skip chat hydration (uses React Query)
- Updated stateInvalidation.ts to not call fetchConversations (React Query handles it)
- Updated stores/index.ts to export feature store
- Updated documentation
- Test files still reference old store (separate update needed)
- Action 4.5.1.5 complete
