Match videos: composed VS-card OG preview + richer share metadata

Sports match share links now show the full VS composition (fighters,
flags, event, weight class, referee/court/match chips) in WhatsApp /
Telegram / Facebook / Twitter previews instead of the raw video frame.

- Browsershot + puppeteer-bundled Chromium screenshots a dedicated
  1200x675 (true 16:9) render of the vs-mini composition. Chrome runs
  through a small wrapper (bin/browsershot-node.sh) that raises the fd
  limit and reads its full env, since PHP-FPM's stripped env otherwise
  makes Chromium fail to launch.
- Render is JPEG @ q85 (~100 KB) instead of PNG (~700 KB) — WhatsApp
  silently drops OG images above roughly 300 KB, which is why music
  thumbnails always showed and match cards didn't.
- SportsMatchController@store/update renders synchronously so the
  picture is guaranteed to exist before the user copies the share URL;
  edits regenerate and old stamped variants are cleaned. The og:image
  URL carries a ?v={updated_at} stamp so scrapers recache on edit.
- accessShare() (/s/{token}) now detects scraper user agents and serves
  the video page HTML inline instead of a 302 — some crawlers don't
  follow redirects when building link previews.
- og:description / twitter:description built from headerData(): flag
  emoji + fighter names (blue vs red), event, weight, match#, court,
  referee, view count, upload date.
- Fixed 3-dot menu on video cards being hidden behind the next card
  (:has(.dropdown-menu.show) promotes the active card above siblings
  and lifts the overflow:hidden clip on .yt-video-info).
- vs-mini: skip the entrance animation on touch devices and expose a
  .vs-mini-static class so the OG render always captures the final
  frame instead of a random mid-animation moment.

Also adds an admin gallery at /admin/og-previews for spot-checking the
generated preview JPEGs.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

composer.json

@@ -14,7 +14,8 @@
         "laravel/tinker": "^2.8",
         "p7h/nas-file-manager": "dev-main",
         "php-ffmpeg/php-ffmpeg": "^1.4",
-        "pragmarx/google2fa-laravel": "^3.0"
+        "pragmarx/google2fa-laravel": "^3.0",
+        "spatie/browsershot": "^3.61"
     },
     "require-dev": {
         "fakerphp/faker": "^1.9.1",