feat(pitch): reveal.js презентация на /demo (палитра Nomad, 7 слайдов)

- pitch/deck/index.html — колода reveal.js (fullscreen F, листание, speaker view S)
- pitch/deck/fetch-reveal.sh — вендоринг reveal локально (offline-proof)
- развёрнуто: https://med.secondbrain.tools/demo

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

pitch/deck/fetch-reveal.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# Вендорит reveal.js локально (чтобы презентация не зависела от CDN на сцене).
+set -euo pipefail
+V=5.1.0
+B="https://cdn.jsdelivr.net/npm/reveal.js@${V}"
+mkdir -p reveal/dist/theme reveal/plugin/notes reveal/plugin/highlight
+curl -fsSL "$B/dist/reveal.css"            -o reveal/dist/reveal.css
+curl -fsSL "$B/dist/reveal.js"             -o reveal/dist/reveal.js
+curl -fsSL "$B/dist/theme/white.css"       -o reveal/dist/theme/white.css
+curl -fsSL "$B/plugin/notes/notes.js"      -o reveal/plugin/notes/notes.js
+echo "reveal.js ${V} vendored into ./reveal/"