Add zustand dependency for @xyflow/react

- Add zustand ^5.0.2 to dependencies
- Required by @xyflow/react for state management
- Fixes 'Could not resolve zustand/traditional' error

🤖 Generated with Claude Code

visualization/sug_v6_1_2_5/package.json

@@ -11,7 +11,8 @@
     "react-dom": "^19.2.0",
     "esbuild": "^0.25.11",
     "@xyflow/react": "^12.9.1",
-    "dagre": "^0.8.5"
+    "dagre": "^0.8.5",
+    "zustand": "^5.0.2"
   },
   "keywords": [
     "visualization",