Fix frontend build dependencies

frontend/package-lock.json

@@ -31,6 +31,7 @@
         "lucide-react": "^0.544.0",
         "react": "^19.1.1",
         "react-dom": "^19.1.1",
+        "react-is": "^19.2.0",
         "react-markdown": "^10.1.0",
         "recharts": "^3.2.1",
         "remark-gfm": "^4.0.1",
@@ -11884,8 +11885,7 @@
       "version": "19.2.4",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-19.2.4.tgz",
       "integrity": "sha512-W+EWGn2v0ApPKgKKCy/7s7WHXkboGcsrXE+2joLyVxkbyVQfO3MUEaUQDHoSmb8TFFrSKYa9mw64WZHNHSDzYA==",
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
     },
     "node_modules/react-markdown": {
       "version": "10.1.0",

frontend/package.json

@@ -40,6 +40,7 @@
     "lucide-react": "^0.544.0",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
+    "react-is": "^19.2.0",
     "react-markdown": "^10.1.0",
     "recharts": "^3.2.1",
     "remark-gfm": "^4.0.1",