fix(deps): update react monorepo to v19

Author: renovate[bot]

package-lock.json

@@ -16,14 +16,14 @@
     "@netlify/blobs": "^8.2.0",
     "@netlify/functions": "^2.8.2",
     "@tailwindcss/vite": "^4.0.14",
-    "@types/react": "^18.2.79",
-    "@types/react-dom": "^18.2.25",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
     "astro": "^5.5.3",
     "blobshape": "^1.0.0",
     "marked": "^13.0.0",
     "marked-shiki": "^1.2.0",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
     "tailwindcss": "^4.0.14",
     "unique-names-generator": "^4.7.1"
   },