fix(deps): update react monorepo to v19

Author: renovate[bot]

package.json

@@ -7,13 +7,13 @@
   },
   "dependencies": {
     "next": "^14.2.3",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
     "resend": "^3.2.0"
   },
   "devDependencies": {
     "@types/node": "20.19.4",
-    "@types/react": "18.3.3",
+    "@types/react": "19.1.10",
     "typescript": "5.8.3"
   }
 }