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### What problem does this PR solve? Improves the chat interface by adding a multiline chat area that grows when multiple lines exists. Some images: * Empty: <img width="1334" alt="image" src="https://github.com/user-attachments/assets/e8a68b46-def9-45af-b5b1-db0f0b67e6d8" /> * With multiple lines and documents: <img width="1070" alt="image" src="https://github.com/user-attachments/assets/ff976c5c-08fa-492f-9fc0-17512c95f9f2" /> ### Type of change - [X] New Feature (non-breaking change which adds functionality)