chore(verify): store headless capture script used as verification evidence

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

scripts/capture-sample.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Headless Chrome screenshot of the sample page (WSL2 → Windows Chrome).
+# Usage: scripts/capture-sample.sh <output.png> [url]
+# Requires the dev server: npm run dev -- --host 127.0.0.1 --port 5173
+set -euo pipefail
+OUT_WSL="${1:?output png path (WSL path)}"
+URL="${2:-http://127.0.0.1:5173/?sample=1}"
+CHROME="/mnt/c/Program Files/Google/Chrome/Application/chrome.exe"
+mkdir -p "$(dirname "$OUT_WSL")"
+timeout 200 "$CHROME" --headless=new --no-sandbox --use-gl=angle --use-angle=swiftshader \
+  --enable-unsafe-swiftshader --enable-logging=stderr --v=0 --window-size=1600,1000 \
+  --timeout=45000 --screenshot="$(wslpath -w "$OUT_WSL")" "$URL"