Split transcript into two panes — separate assistant output from tool-call output

Summary

The Claude Code TUI renders a single linear transcript where top-level assistant/user lines (white ●) and tool calls + their results (grey/dim ⏺) are interleaved. On long, tool-heavy tasks the tool output buries the assistant's reasoning and replies, making the conversation thread hard to follow.

Request

An optional split-pane view:

• one pane for the top-level conversation (white-dot lines: prompts and assistant replies/narration),
• one pane for tool-call activity (grey-dot lines: tool invocations and results),

so the conversation thread stays readable while tool I/O scrolls independently.

Value

Much easier to follow the assistant's intent during long agentic runs without losing access to the tool detail. Today the only options are collapsing detail (Ctrl+O) or scrolling, both of which trade one stream for the other rather than showing both at once.

Notes

Terminal-native panes (e.g. Windows Terminal split) split terminals, not Claude's white-vs-grey output streams, so this can't be achieved outside the app.