marketing: turn Killer Demo into an interactive agent race

[SignalLayerLabs]

Summary

Turns the MARGINAL Killer Demo into an actual interactive browser experience.

Interactive race

Both lanes start from the exact same deterministic coding defect at the same time:

• WITHOUT MARGINAL executes every candidate action
• WITH MARGINAL evaluates the same candidates and funds or rejects them before spend
• synchronized Diagnose → Fix → Verify stages
• live terminal output
• live token, cost, latency and call counters
• Run / Pause / Next Step / Reset controls
• 0.5x / 1x / 2x / 4x playback speed
• final PASS vs PASS comparison

Core message

SAME BUG. SAME START. WATCH THE EXTRA WORK.

The race is artifact-backed and uses the deterministic Killer Demo result rather than invented numbers.

Claim discipline

• deterministic replay
• declared action-cost estimates
• not provider telemetry
• not a production benchmark
• no claim that every real workload achieves the displayed savings

Engineering

• moves interactive UI into dedicated CSS and JavaScript assets
• keeps Python as the deterministic data source
• adds interactive-demo tests
• regenerates Codex runtime and provenance
• updates GitHub Pages artifact checks