[FEATURE]: per-tool output visibility #17250

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Hi!

Problem

The TUI has a global toggle (ctrl+e) for showing/hiding tool output. This is all-or-nothing: either every tool's output is expanded, or none is. In practice, users keep it off because most tool outputs (file reads, shell commands) are noise. But some tools — especially plugins — produce rich, formatted output that's the whole point of running them.

Proposal

Add a show_tool_output array to tui.json that lists tool names whose output should always be visible, regardless of the global toggle:

{
  "show_tool_output": ["project_status", "todo_read", "todo_write"]
}

Tools in this list:

• Show their output block even when the global toggle is off
• Start expanded by default (instead of collapsed)

Tools not in the list behave exactly as they do today.

Motivation

Consider a project_status plugin that renders a project health dashboard:

📊 Git
┌──────────────┬────┬──────────────────────────┐
│ Branch       │ 🔀 │ feat/per-tool-output      │
│ Uncommitted  │ ✅ │ clean                     │
│ Ahead/Behind │ 📡 │ +1 -0                     │
└──────────────┴────┴──────────────────────────┘

📝 Recent Commits
┌───┬─────────┬──────────────────────────────────┐
│ 1 │ d4ae8ec │ feat(tui): add per-tool output... │
│ 2 │ d8fbe0a │ chore: update nix hashes          │
│ 3 │ b76ead3 │ refactor(desktop): rework default..│
└───┴─────────┴──────────────────────────────────┘

📄 Project Docs
┌───────────┬────┐
│ README    │ ✅ │
│ LICENSE   │ ✅ │
│ CHANGELOG │ 🔲 │
│ CI config │ ✅ │
└───────────┴────┘

Without per-tool visibility, this dashboard is hidden behind the global toggle, mixed in with every other tool's output. With it, users get the rich output they care about while keeping the rest compact.

Implementation

This is a 6-line change across 2 files:

• tui-schema.ts: add show_tool_output as an optional string[] to TuiOptions
• session/index.tsx: in GenericTool, check if props.tool is in the list to (1) default expanded to true and (2) show the output block even when the global toggle is off

I can easily open a PR (I've been testing this locally, it's as straightforward as mentioned above).

Cheers!