test: refresh live no-order baseline

[jackhai9]

Summary

• add a strict three-sample isolated HYPEUSDT no-order live capture for userscript 2.7.126
• refresh the checked-in no-order performance baseline
• update the UI automation guide to point at the current capture

Live evidence

• click to first feedback: median 3.6 ms, p95 11.7 ms
• click to final ready: median 95.3 ms, p95 106.9 ms
• zero uncaught errors, zero dropped probe events, zero long tasks
• one 59.8 ms long animation frame in the first sample

Validation

• npm run summarize:binance-orderbook-live -- e2e/binance-orderbook/live-baselines/no-orders-2026-08-27.capture.json --compare e2e/binance-orderbook/live-baselines/no-orders.baseline.json
• git diff --check