[Feature] Support normal screen buffer mode for scrollable terminal history

[Marmot1024]

Problem

When using MiMoCode in macOS Terminal (MacBook M5 Pro), it's impossible to scroll up to view previous response content. Scrolling up shows a mix of previous shell output and current MiMoCode UI content.

Claude Code and Codex on the same device don't have this issue — their output is fully scrollable.

Root Cause

MiMoCode uses @opentui/core TUI framework which defaults to alternate screen buffer mode (\x1b[?1049h). This mode has no scrollback history.

Proposed Solution

Please consider one of:

1. Add --no-alternate-screen flag or config option
2. Implement internal scrollback in the TUI
3. Add output logging that persists responses to a file

Environment

• macOS, MacBook M5 Pro
• MiMoCode v0.1.3
• @opentui/core v0.1.101