Fix: Label now is showed correctly in overview table

[Felipedino]

This pull request refactors variable names and improves clarity in the image_dataloader.py file, making the code easier to read and maintain. The changes mainly focus on renaming variables for better semantic meaning and ensuring the correct label is assigned to each image.

Refactoring and clarity improvements:

• Renamed the entries variable to children in the _find_imagefolder_root function to better reflect its purpose as directory children.
• Renamed variables in _load_images_from_directory: entries is now top_level_dirs, class_name is now top_level_dir, and class_path is now top_level_dir_path, clarifying the code's intent.
• Changed the label assignment in the image records to use os.path.basename(dirpath) instead of the previous variable, ensuring the label accurately represents the directory name containing the image.

[Copilot]

Pull request overview

This pull request adjusts the imagefolder loading logic in image_dataloader.py to ensure each image record’s label reflects the directory that actually contains the image, and performs small variable renames to improve readability.

Changes:

• Renamed local variables in _find_imagefolder_root and _load_images_from_directory for clearer semantics.
• Updated label assignment to use os.path.basename(dirpath) so labels match the image’s containing folder during recursive directory walks.

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