Add tutorial workflow function for new desktop users (#2315)

Co-authored-by: huchenlei <huchenlei@proton.me>

src/scripts/app.ts

@@ -1061,7 +1061,18 @@ export class ComfyApp {
 
     // We failed to restore a workflow so load the default
     if (!restored) {
-      await this.loadGraphData()
+      const settingStore = useSettingStore()
+
+      // If tutorial is not completed, load the tutorial workflow
+      if (!settingStore.get('Comfy.TutorialCompleted')) {
+        await settingStore.set('Comfy.TutorialCompleted', true)
+        // Load model folders to ensure the missing models' corresponding folders
+        // can be correctly identified.
+        await useModelStore().loadModelFolders()
+        await useWorkflowService().loadTutorialWorkflow()
+      } else {
+        await this.loadGraphData()
+      }
     }
 
     this.#addDrawNodeHandler()