更新 UI 编辑器节点布局与字体配置

增加自定义尺寸与排列模式支持，调整字体属性结构以适应绑定格式

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

@@ -1119,11 +1119,18 @@ mod tests {
                 "src_ui_design": "page",
                 "root": {
                     "id": "root",
-                    "transform": {
-                        "anchor_min": [0.0, 0.0],
-                        "anchor_max": [1.0, 1.0],
-                        "offset_min": [0.0, 0.0],
-                        "offset_max": [0.0, 0.0]
+                    "layout": {
+                        "transform": {
+                            "anchor_min": [0.0, 0.0],
+                            "anchor_max": [1.0, 1.0],
+                            "offset_min": [0.0, 0.0],
+                            "offset_max": [0.0, 0.0]
+                        },
+                        "custom_minimum_size": [0.0, 0.0],
+                        "size_flags_horizontal": 1,
+                        "size_flags_vertical": 1,
+                        "size_flags_stretch_ratio": 1.0,
+                        "container": "None"
                     },
                     "metadata": {
                         "name": "根节点",
@@ -1137,7 +1144,7 @@ mod tests {
                     "components": [{
                         "Text": {
                             "content": "标题",
-                            "font": "missing-font",
+                            "font": {"Bound": "missing-font"},
                             "font_style": "Normal",
                             "font_sizing": {"Fixed": 14},
                             "color": [255, 255, 255, 255],
@@ -1147,6 +1154,7 @@ mod tests {
                             "line_spacing": 1.0
                         }
                     }],
+                    "children_display_mode": "Stack",
                     "children": []
                 }
             }],