Route export storage hooks through platform services

src/canvas.cpp

@@ -13,9 +13,6 @@
 
 #ifdef __APPLE__
 #include <Foundation/Foundation.h>
-#import "objc_utils.h"
-#elif __WEB__
-void webgl_sync();
 #endif
 
 namespace {
@@ -2021,9 +2018,7 @@ void Canvas::export_equirectangular_thread(std::string file_path)
         data.save_png(file_path);
     }
 
-#ifdef __IOS__
-    save_image_library(file_path);
-#endif
+    App::I->publish_exported_image(file_path);
 }
 
 void Canvas::inject_xmp(std::string jpg_path)
@@ -2305,9 +2300,7 @@ void Canvas::export_cube_faces_thread(std::string file_name)
         face.save_png(path);
         pb->increment();
 
-#ifdef __IOS__
-        save_image_library(path);
-#endif
+        App::I->publish_exported_image(path);
 #ifdef __OBJC__
         [files addObject : [NSString stringWithUTF8String:path.c_str()] ];
 #endif
@@ -2575,9 +2568,7 @@ bool Canvas::project_save_thread(std::string file_path, bool show_progress)
             if (!sw.save(lapse_path))
                 LOG("cannot save timelase to %s", lapse_path.c_str());
         }
-#if __WEB__
-        webgl_sync();
-#endif
+        App::I->flush_platform_storage();
     }
 
     if (show_progress)