chore: add react-window dependency for message virtualization

Co-Authored-By: Claude <noreply@anthropic.com>

desktop/package.json

@@ -27,6 +27,7 @@
     "lucide-react": "^0.577.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
+    "react-window": "^2.2.7",
     "smol-toml": "^1.6.0",
     "tailwind-merge": "^3.5.0",
     "tweetnacl": "^1.0.3",
@@ -37,6 +38,7 @@
     "@tauri-apps/cli": "^2",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
+    "@types/react-window": "^2.0.0",
     "@vitejs/plugin-react": "^4.6.0",
     "autoprefixer": "^10.4.27",
     "postcss": "^8.5.8",