feat: Sentinel Lab — interactive fee-engine playground on the site

- lab.html: live SentinelHookV1 state via public RPC polling (graceful
  snapshot fallback), clickable FeeUpdated history from the on-chain
  demo, and an interactive simulator replaying 25,309 labeled trades
  with live policy sliders (k, cap, base, half-life)
- lab-data: hook snapshot (72 FeeUpdated events from broadcast
  receipts) + systematic 1-in-100 trade sample
- index.html: lab linked from the research-log banner
- sim chart autoscale fix verified via headless render

Author: chaosxcode

docs/index.html

@@ -53,6 +53,7 @@ <h2>The evidence already exists &mdash; and it led somewhere unexpected.</h2>
 <p class="muted"><strong>The problem is real and severe.</strong> LPs paid adverse-selection costs on 126 of 126 active pool-days. The worst 10% of five-minute windows carried ~80% of all losses. On the flagship native-ETH/USDC pool alone, sampled-day losses reached $8.1M.</p>
 <p class="muted"><strong>The v1 signal failed its bar</strong> (trade-level predictability &rho; &asymp; 0.02 vs the pre-registered 0.15) <strong>and the failure was published as committed.</strong> That is what falsifiable research looks like.</p>
 <p class="muted"><strong>The post-mortem found where the signal actually lives.</strong> Toxic flow clusters in time: trailing losses predict next-window losses at &rho; = 0.61. Sentinel v2 was rebuilt around that fact &mdash; a self-contained on-chain signal (no oracle), a calibrated continuous fee policy that beat static fees in <strong>18 of 18 out-of-sample configurations</strong>, and a working contract (<a href="https://github.com/chaosxcode/sentinel-hook/blob/main/src/SentinelHookV1.sol">SentinelHookV1.sol</a>) at ~14k gas overhead, inside the safety budget.</p>
+<p class="muted"><strong>Try it yourself:</strong> <a href="lab.html">Sentinel Lab</a> — replay the labeled trades through the fee engine, tune the policy, and watch the live hook state.</p>
 <p class="muted">Full log: <a href="https://github.com/chaosxcode/sentinel-hook/blob/main/research/FINDINGS.md">research/FINDINGS.md</a> &bull; Pre-registration: <a href="https://github.com/chaosxcode/sentinel-hook/blob/main/research/GATE1_PREREG.md">research/GATE1_PREREG.md</a> &bull; Final v2 claims are reserved for an untouched holdout period, evaluated exactly once.</p>
 </section>
 

docs/lab-data/hook-snapshot.json

@@ -0,0 +1 @@
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events (topic0 0x2c104de2..., signature FeeUpdated(bytes32,uint24,uint24,uint128)) emitted by SentinelHookV1 during the Unichain Sepolia demo. Verify any tx on sepolia.uniscan.xyz."}