[UX] Show tool output summary inline (like Claude Code)

[randomm]

Inspiration

Claude Code shows tool output inline:

● Read(opencode.work.json)
└ Read 508 lines

● Bash(jq . opencode.work.json > /dev/null && echo "JSON valid")
└ JSON valid

Current oclite

We only show tool name + args:

✓ read  ratcher/README.md
✓ bash  ls -la /Users/janni/git/ratcher/

Proposed

Show brief output summary:

✓ read  ratcher/README.md
  └ 234 lines
✓ bash  ls -la /Users/janni/git/ratcher/
  └ 15 files

Implementation

• Capture first line or summary of tool output
• Display nested under the tool line
• Keep it brief (one line max)

Priority

Medium — nice UX improvement