Feature request: configurable height/row count for the inline agents tray

Feature request

Make the inline agents tray (the compact strip above the status line that lists running subagents, e.g. main / codex-planner Critique coin-concurrency plan) configurable in height / visible row count.

Problem

When Claude Code runs in a short terminal panel (e.g. the VS Code / Cursor integrated terminal at typical bottom-panel height), the inline agents tray only shows one or two rows — or disappears entirely. With several subagents running in parallel, there is no way to see all of them at a glance:

• Pressing ← opens FleetView, but that is a modal overlay that replaces the conversation view — you cannot watch agents and the chat at the same time.
• Enlarging the terminal panel shows more tray rows, but sacrifices editor space, which defeats the purpose of a compact bottom panel.

Proposal

Any of these would solve it:

1. A settings.json key (e.g. agentTrayRows or agentTrayHeight) to pin the tray to N rows regardless of terminal height, letting the conversation area shrink instead.
2. A bindable keyboard action (e.g. app:toggleAgentTray / app:expandAgentTray) to expand/collapse the tray inline without entering the FleetView overlay.
3. Making the tray area mouse-resizable in the fullscreen TUI.

Environment

• Claude Code (fullscreen TUI, "tui": "fullscreen") inside the Cursor integrated terminal
• Windows 11
• Verified against the current settings schema and keybindings action list: no existing option controls this.