为识别根节点补充名称兜底

LLM 返回空根名称时使用页面根节点默认名称，避免空标题进入 UI 树。

apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/recognition.rs

@@ -12,7 +12,7 @@ use crate::ui_editor::layout::node::{Node as LayoutNode, NodeMetadata, NodeSourc
 use crate::ui_editor::layout::transform::Transform;
 use crate::ui_editor::resource::ui_design_image::UIDesignImage;
 use crate::ui_editor::state::{State, UITree};
-use crate::ui_editor::utils::{random_node_id, NodeId, UIDesignImageId};
+use crate::ui_editor::utils::{NodeId, UIDesignImageId, random_node_id};
 use nalgebra::{Point2, Vector2};
 use platform_llm::{
     LlmFunctionTool, LlmMessage, LlmMessageContentPart, LlmRunRequest, LlmToolChoice,
@@ -463,19 +463,23 @@ mod tests {
         let oversized = (0..=MAX_RECOGNITION_TREE_NODES)
             .map(|_| serde_json::json!({"children": []}))
             .collect::<Vec<_>>();
-        assert!(validate_recognition_response_shape(&serde_json::json!({
-            "trees": [{"root": {"children": oversized}}]
-        }))
-        .is_err());
+        assert!(
+            validate_recognition_response_shape(&serde_json::json!({
+                "trees": [{"root": {"children": oversized}}]
+            }))
+            .is_err()
+        );
 
         let mut nested = serde_json::json!({"children": []});
         for _ in 0..MAX_RECOGNITION_TREE_DEPTH {
             nested = serde_json::json!({"children": [nested]});
         }
-        assert!(validate_recognition_response_shape(&serde_json::json!({
-            "trees": [{"root": {"children": [nested]}}]
-        }))
-        .is_err());
+        assert!(
+            validate_recognition_response_shape(&serde_json::json!({
+                "trees": [{"root": {"children": [nested]}}]
+            }))
+            .is_err()
+        );
     }
 
     #[test]
@@ -595,11 +599,13 @@ mod tests {
             root: test_node(),
         };
 
-        assert!(validate_tree_image_ids(
-            &[tree(page.clone()), tree(slave.clone())],
-            &[page.clone(), slave.clone()],
-        )
-        .is_ok());
+        assert!(
+            validate_tree_image_ids(
+                &[tree(page.clone()), tree(slave.clone())],
+                &[page.clone(), slave.clone()],
+            )
+            .is_ok()
+        );
         assert!(
             validate_tree_image_ids(&[tree(page.clone())], &[page.clone(), slave.clone()]).is_err()
         );
@@ -838,11 +844,16 @@ pub(crate) async fn recognize_ui_impl_with_provider(
                 Confidence::Confident => StageStatus::NoProblem,
                 Confidence::UnSure(reason) => StageStatus::NeedReview(reason),
             };
+            let root_name = if recognition_root.name.trim().is_empty() {
+                "页面根节点".to_string()
+            } else {
+                recognition_root.name
+            };
             let root = LayoutNode {
                 id: random_node_id(),
                 layout: ControlLayout::with_transform(Transform::stretch()),
                 metadata: NodeMetadata {
-                    name: recognition_root.name,
+                    name: root_name,
                     description: recognition_root.description,
                     layout_status: root_layout_status,
                     component_status: StageStatus::NoProblem,