Add isDefaultRoadmapData helper and update welcome message visibility

Co-authored-by: mikebarkmin <2592379+mikebarkmin@users.noreply.github.com>

Author: Copilot

packages/learningmap/src/LearningMapEditor.tsx

@@ -28,7 +28,7 @@ import { RoadmapData, NodeData, ImageNodeData, TextNodeData, Settings } from "./
 import { SettingsDrawer } from "./SettingsDrawer";
 import FloatingEdge from "./FloatingEdge";
 import { EditorToolbar } from "./EditorToolbar";
-import { parseRoadmapData } from "./helper";
+import { parseRoadmapData, isDefaultRoadmapData } from "./helper";
 import { LearningMap } from "./LearningMap";
 import { Info, Redo, Undo, RotateCw, ShieldAlert } from "lucide-react";
 import useUndoable from "./useUndoable";
@@ -840,7 +840,7 @@ export function LearningMapEditor({
             backgroundColor: settings?.background?.color || "#ffffff",
           }}
         >
-          {nodes.length === 0 && edges.filter(e => !e.id.startsWith("debug-")).length === 0 && (
+          {isDefaultRoadmapData(nodes, edges, settings) && (
             <WelcomeMessage
               onOpenFile={handleOpen}
               onAddTopic={() => addNewNode("topic")}

packages/learningmap/src/helper.ts

@@ -83,3 +83,27 @@ export const parseRoadmapData = (
     return { settings: { title: "New Roadmap" }, version: 1 };
   }
 };
+
+export const isDefaultRoadmapData = (
+  nodes: any[],
+  edges: any[],
+  settings?: any
+): boolean => {
+  // Check if there are no nodes or edges
+  const hasNoContent = nodes.length === 0 && edges.filter(e => !e.id.startsWith("debug-")).length === 0;
+  
+  if (!hasNoContent) {
+    return false;
+  }
+  
+  // Check if settings are in default state
+  // Default settings: { background: { color: "#ffffff" } }
+  const hasDefaultSettings = 
+    !settings?.title &&
+    !settings?.language &&
+    (!settings?.background || 
+      (settings.background.color === "#ffffff" && 
+       (!settings.background.nodes || settings.background.nodes.length === 0)));
+  
+  return hasDefaultSettings;
+};