feat(e2e-harness): preserve ANSI color in snapshot frames#730
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frame() returns plain text (translateToString), which strips the colors — the snapshots are meant to faithfully reproduce the colored CLI. Add frameAnsi(), which serializes the xterm buffer back to ANSI (fg/bg incl. 256-color and truecolor, plus bold/italic/underline/etc.) by reading cell attributes, and have tui-snapshots write .ans frames with it. frame() stays plain for the agent-facing render_screen. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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