For familiarity we need to decide if this should feel like a word processor (WP) or an IDE.

1. WP: Microsoft Word, Google Docs
2. IDE: VS Code, RStudio, JetBrains

For the WP, we'd have a persistent left pane with references and right pane with AI interactions.
For the IDE, we'd have collapsible and relocatable windows for writing, references, and AI interactions.