fix: graph rag ui improvements

frontend/package.json

@@ -34,6 +34,7 @@
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
     "copy-to-clipboard": "^3.3.3",
+    "d3-force": "^3.0.0",
     "date-fns": "^4.2.1",
     "i18next": "^26.0.4",
     "i18next-browser-languagedetector": "^8.2.1",
@@ -62,6 +63,7 @@
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4.2.4",
+    "@types/d3-force": "^3.0.10",
     "@types/lodash": "^4.17.20",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",