[Fix] Integrate Markdansi for proper markdown rendering

[randomm]

Problem

Current markdown renderer (cli/lite/markdown.ts) is broken:

• Bold text not showing
• Code blocks show raw backticks
• wrap() function corrupts ANSI escape codes

Solution

Replace with Markdansi — purpose-built for streaming LLM output.

Benefits

Feature	Current	With Markdansi
Bold	❌ broken	✅
Code blocks	❌ shows backticks	✅ with box, gutter
Tables	❌	✅ GFM, unicode
Hyperlinks	❌	✅ OSC-8
Streaming	❌ breaks mid-token	✅ hybrid buffering

Integration

import { createMarkdownStreamer, render } from "markdansi"

const streamer = createMarkdownStreamer({
  render: (md) => render(md, { width: 80, theme: "default" }),
  mode: "hybrid",
})

// Stream: streamer.push(chunk) → ANSI string
// Finish: streamer.finish() → final ANSI

Package

• npm: markdansi
• Size: ~70KB
• Node: >=22 (matches oclite)
• License: MIT

Acceptance Criteria

• Replace markdown.ts with Markdansi wrapper
• Bold, code, headers render correctly
• Streaming works without breaking mid-token