fix 5024: 'NoneType' object has no attribute 'is_animation_playing

[kapluscheung]

Addressed problem description

fix 5024: 'NoneType' object has no attribute 'is_animation_playing
5024

Solution description

Added checking for context screen:

screen = bpy.context.screen
    if screen and screen.is_animation_playing:
        return

Preflight checklist

Put an x letter in each brackets when you're done this item:

• Code changes complete.
• Code documentation complete.
• Documentation for users complete (or not required, if user never sees these changes).
• Manual testing done.
• Unit-tests implemented.
• Ready for merge.

[Copilot]

Pull Request Overview

This PR fixes a NoneType AttributeError that occurred when bpy.context.screen is None and the code attempts to access the is_animation_playing attribute. The fix adds a null check before accessing the attribute.

• Added defensive null check for bpy.context.screen in the scene change handler
• Consistent with existing null-checking pattern used elsewhere in the same file
• Prevents crashes during rendering or other contexts where screen context is unavailable

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