修复视觉素材绑定前置校验

在进入视觉素材绑定步骤时检查独立素材

复用素材前置校验避免下游重复提示

apps/ai-game-creator-shell/src/features/ui-editor/prerequisites.ts

@@ -91,6 +91,12 @@ export function validateAssetRecognitionPrerequisites(
       });
     }
   }
+  if (Object.keys(state.sprite_assets).length === 0) {
+    issues.push({
+      code: 'missing-sprite-assets',
+      message: '请先导入独立素材',
+    });
+  }
   return issues;
 }
 
@@ -98,12 +104,6 @@ export function validateLayoutGenerationPrerequisites(
   state: State,
 ): UiEditorPrerequisiteIssue[] {
   const issues = validateAssetRecognitionPrerequisites(state);
-  if (Object.keys(state.sprite_assets).length === 0) {
-    issues.push({
-      code: 'missing-sprite-assets',
-      message: '请先导入并绑定独立素材',
-    });
-  }
   const visit = (nodes: State['ui_trees'][number]['root']['children']) => {
     for (const node of nodes) {
       for (const component of node.components) {