Handling processInitialRoute for Initial Page Display in Patapata

[matsuyani556]

Description

Currently, Patapata requires the processInitialRoute method to be called when displaying the first page. This is automatically invoked when using the StartupSequence. However, if StartupSequence is not used, the method must be called manually.

Until processInitialRoute is called, the first page in StandardMaterialApp.pages is displayed. However, this page does not handle DeepLink processing, resulting in pageData being null. This causes issues when pageData does not allow null values.

To address this:

• Display a page created by SplashPageFactory until processInitialRoute is called.
• Automatically execute processInitialRoute if StartupSequence is not used.

With this approach, the application’s initial page will properly handle DeepLink processing, ensuring a seamless user experience.