Lays out the lockstep migration from legacy white-card PNGs +
constants to the Terminal aesthetic. Steps 4 + 5 (artwork +
constant + test updates) must land in one commit so the PNG
path and the constant-fallback path don't visually diverge.
Tracks Option D from the SESSION_HANDOFF Resume prompt.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
funman300