feat(site): serve branded OG images dynamically (#1345)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

site/package.json

@@ -26,6 +26,7 @@
     "@mux/mux-node": "^12.8.1",
     "@mux/mux-uploader-react": "^1.4.1",
     "@nanostores/react": "^1.0.0",
+    "@resvg/resvg-js": "^2.6.2",
     "@sentry/astro": "^10.43.0",
     "@shikijs/transformers": "^4.0.2",
     "@tailwindcss/vite": "^4.2.1",
@@ -46,6 +47,7 @@
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "reading-time": "^1.5.0",
+    "satori": "^0.26.0",
     "schema-dts": "^1.1.5",
     "sharp": "^0.34.3",
     "shiki": "^4.0.2",