Bug Description

The main chat terminal container in ChatInterface.tsx and MultiAgentTask.tsx uses Tailwind's max-w-4xl class (896px max-width). This caps the terminal at roughly ~110 columns regardless of how wide the Emdash window is.

When using a wide monitor or full-screen window, the terminal stays capped at 896px and the extra horizontal space is wasted. The sidebar (Context, MCP, Todo panel) already takes ~280px, so on a 1920px screen the terminal only uses about 46% of available width.

Affected code

• src/renderer/components/ChatInterface.tsx:1252 — terminal container div: max-w-4xl
• src/renderer/components/ChatInterface.tsx:1164 — tab bar container: max-w-4xl
• src/renderer/components/MultiAgentTask.tsx:640 — multi-agent terminal: max-w-4xl
• src/renderer/components/MultiAgentTask.tsx:723 — multi-agent input: max-w-4xl

The FitAddon and ResizeObserver chain works correctly — the terminal would resize to fill the container, but the CSS caps the container width.

Expected Behavior

The chat terminal should scale with the window width, either:

• Remove max-w-4xl entirely and let the terminal fill available space
• Use a much wider cap (e.g., max-w-[1600px] or max-w-screen-xl)
• Make it configurable in settings

Environment

• emdash v0.4.42
• macOS