Add document resize service boundary

src/app_core/document_resize.h

@@ -21,6 +21,15 @@ struct DocumentResizePlan {
     bool clears_history = false;
 };
 
+class DocumentResizeServices {
+public:
+    virtual ~DocumentResizeServices() = default;
+
+    virtual void resize_document(int width, int height) = 0;
+    virtual void update_title() = 0;
+    virtual void clear_history() = 0;
+};
+
 [[nodiscard]] inline DocumentResizeDialogState make_document_resize_dialog_state(
     int current_resolution)
 {
@@ -54,4 +63,20 @@ struct DocumentResizePlan {
         });
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_document_resize_plan(
+    const DocumentResizePlan& plan,
+    DocumentResizeServices& services)
+{
+    if (plan.width <= 0 || plan.height <= 0) {
+        return pp::foundation::Status::out_of_range("resize dimensions must be positive");
+    }
+
+    services.resize_document(plan.width, plan.height);
+    services.update_title();
+    if (plan.clears_history) {
+        services.clear_history();
+    }
+    return pp::foundation::Status::success();
+}
+
 }