feat: implement cross-canvas linking, enhanced node type selection, and canvas management

app/composables/useCanvas.ts

@@ -23,6 +23,8 @@ export interface CanvasEdge {
 }
 
 export interface CanvasData {
+  id?: string
+  name?: string
   nodes: CanvasNode[]
   edges: CanvasEdge[]
 }
@@ -72,7 +74,12 @@ export const useCanvas = () => {
       toSide: e.toSide || 'left'
     }))
 
-    return { nodes, edges }
+    return { 
+      id: json.id,
+      name: json.name,
+      nodes, 
+      edges 
+    }
   }
 
   const getAuthHeaders = (): Record<string, string> => {