feature: loading graph structure

src/stores/TreeStore.tsx

@@ -10,6 +10,7 @@ export interface TreeStore {
   tree: TreeDataNode[];
   add: (childNode: NodeContext, parentNodeId: string | undefined) => void;
   remove: (nodeId: string) => void;
+  reset: () => void;
 }
 
 export const useGraphLayersTreeStore = create<TreeStore>()((set) => ({
@@ -87,7 +88,13 @@ export const useGraphLayersTreeStore = create<TreeStore>()((set) => ({
       parentIdByChildId: state.parentIdByChildId,
       tree: createTree([...state.rootNodes], nodesFlatById)
     }
-  })
+  }),
+  reset: () => set({
+    nodesFlatById: new Map<React.Key, TreeDataNode>(),
+    parentIdByChildId: new Map<React.Key, string>(),
+    rootNodes: [],
+    tree: [],
+  }),
 }));
 
 export function createTree(nodes: TreeDataNode[], nodesFlatById: Map<React.Key, TreeDataNode>): TreeDataNode[] {