合并master并保留双侧决策记录

合并 origin/master 的 UI 编辑器、GDD 审批与前端修复。

保留本分支 LLM Router、Direct 过程卡与私有路径相关实现和决策记录。

解决 decision-log 文档冲突，完整保留双方新增决策条目。

apps/ai-game-creator-shell/src-tauri/src/main.rs

@@ -347,6 +347,15 @@ fn save_ui_design_state(
     ui_editor::persistence::save_ui_design_state_at(input)
 }
 
+#[tauri::command]
+fn generate_ui_design_code(
+    input: ui_editor::persistence::GenerateUiDesignCodeInput,
+) -> Result<ui_editor::persistence::GenerateUiDesignCodeResult, String> {
+    let root = Path::new(input.project_path.trim());
+    enforce_project_permission_policy(root, "file.write")?;
+    ui_editor::persistence::generate_ui_design_code_at(input)
+}
+
 #[tauri::command]
 fn ensure_ui_design_resource_for_prototype(
     input: ui_editor::resource_bridge::EnsureUiDesignResourceForPrototypeInput,
@@ -2481,6 +2490,7 @@ fn main() {
             bind_components,
             load_ui_design_state,
             save_ui_design_state,
+            generate_ui_design_code,
             ensure_ui_design_resource_for_prototype,
             generate_platform_art_asset,
             open_canvas_project,