feat(w47): Day 2 — WASM PQ benchmark harness + Playwright integration

- W47.2a: Professional benchmark HTML page with dark theme UI
  - 3 configurable cards: Smoke, ADC (G2), Training (G4)
  - System info bar, progress bars, color-coded pass/fail results
  - Collapsible event log, console API reference
- W47.2b: Benchmark harness JS module
  - benchADC(): measures per-candidate ADC search latency (ns)
  - benchTraining(): measures codebook training time (s)
  - computeGroundTruth(): brute-force L2 for recall validation
  - Seeded PRNG (xorshift128+), 3 warmup iterations excluded
- W47.2c: Playwright verified — Chrome 145.0, WASM Supported
  - benchADC(1000,1,1) returns valid timing JSON via browser_evaluate
- pkg-web/ build: wasm-pack --release --target web (622KB)

Hostile review: APPROVED (0C/0M/4m, all non-blocking)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: matte1782

docs/planning/weeks/week_47/DAY_2_TASKS.md

@@ -3,7 +3,7 @@
 **Date:** 2026-04-08
 **Focus:** WASM Benchmark Harness + Playwright Integration
 **Agents:** BENCHMARK_SCIENTIST, WASM_SPECIALIST
-**Status:** PENDING
+**Status:** COMPLETE
 
 ---
 

docs/reviews/2026-03-06_W47D2_BENCH_HARNESS_REVIEW.md

@@ -0,0 +1,50 @@
+# W47 Day 2 — Hostile Review: WASM Benchmark Harness
+
+**Date:** 2026-03-06
+**Reviewer:** HOSTILE_REVIEWER
+**Round:** R1
+**Verdict:** APPROVED
+
+---
+
+## Artifacts Reviewed
+
+| File | Lines | Purpose |
+|:-----|:------|:--------|
+| `tests/wasm/pq_bench.html` | ~490 | Professional benchmark UI page |
+| `tests/wasm/pq_bench.js` | ~275 | Benchmark harness (benchADC, benchTraining, computeGroundTruth) |
+
+## Attack Vectors Tested
+
+1. **CORRECTNESS**: ns conversion (ms * 1e6 / candidates) -- PASS
+2. **REPRODUCIBILITY**: Seeded PRNG (xorshift128+), warmup excluded -- PASS
+3. **SECURITY**: No innerHTML, all textContent/createElement -- PASS
+4. **COMPLETENESS**: All 3 functions implemented and globally exposed -- PASS
+5. **CONSISTENCY**: Function signatures compatible with plan -- PASS
+6. **METHODOLOGY**: 3 warmup iterations per PQ_BENCHMARK_PLAN 1.3 -- PASS
+7. **WASM INTEGRATION**: Correct init/free lifecycle, import path valid -- PASS
+
+## Playwright Verification
+
+- URL: `http://localhost:8080/tests/wasm/pq_bench.html`
+- Status: "PQ WASM Ready"
+- `benchADC(1000, 1, 1, {dims: 32, m: 4, ksub: 16})` returned valid JSON
+- Chrome 145.0, Win32, WASM Supported
+
+## Findings
+
+| # | Severity | Description | Status |
+|:--|:---------|:------------|:-------|
+| m1 | Minor | Bundle size hardcoded as ~622 KB (actual 607 KiB) | Accept |
+| m2 | Minor | Warmup=3 magic number duplicated in benchADC and benchTraining | Accept |
+| m3 | Minor | Footer version v0.9.0 hardcoded | Accept |
+| m4 | Minor | Ground truth uses O(N log N) sort (timing excluded per plan) | Accept |
+
+## Regression
+
+- cargo test --lib: 1020 passed, 0 failed
+- cargo clippy -- -D warnings: 0 warnings
+
+---
+
+*Reviewed by: HOSTILE_REVIEWER*