New Features

Library & Chat

• Per-message Library Attachments: Attach library items (folders, files, flashcards, conversations) to individual chat messages

• Library Knowledge Base: Chunking and embedding for library files, flashcards, conversations

• Chat Folder Attachment: Link conversations to library folders for context-aware chat

Enhancements

• Chat UI: Improved chat interface and user experience

• File Upload Logic: Refined file attachment handling in chat composer

• Conversation File Storage: Migrated file attachments from JSON to normalized table

• Conversation Detail: Enhanced entity and service for file and library attachments