* Enhanced `_validate_and_prepare_media` method to support additional media types: `Album`, `Playlist`, `UserPlaylist`, and `Mix`.
* Updated media validation checks to ensure proper handling of unavailable media.
* Refactored `_validate_media_instance` to streamline media instance creation and validation.
* Removed redundant `_validate_and_prepare_media_collection` method for cleaner code.
* Improved validation and preparation of media collections for downloads.
* Refactored download context setup and execution logic for better clarity and maintainability.
* Added progress tracking for download tasks and improved handling of download futures.
* Reordered parameters in `item` method for clarity.
* Added `_validate_media_instance` method to streamline media validation.
* Enhanced `_prepare_file_paths_and_skip_logic` for better file handling.
* Introduced `_perform_actual_download` to encapsulate download logic.
* Improved error handling and logging throughout the download process.
* Renamed `_download` to `_get_media_urls` for better clarity on its purpose.
* Simplified URL extraction logic for `Track` and `Video` media types.
* Improved progress setup and error handling in the download process.
* Enhanced `_download_segments` and `_download_postprocess` methods for better readability and maintainability.
* Improved documentation for methods in the `RequestsClient` and `Download` classes.
* Added detailed descriptions, parameters, and return types to enhance code readability and maintainability.
* Updated type hints for various methods in and classes.
* Changed list types from to for better clarity and consistency.
* Improved function signatures to include return types for better type safety.
* Refactored the filter extraction logic to directly use `header.filter_text(i)` for better clarity.
* Updated the filters list to store tuples of index and text, enhancing the data structure used.
* Ensured that the `proxy_model.filters` is set directly, simplifying the code.
* Updated type hints for several methods in `MainWindow` class to improve code clarity and type safety.
* Changed return types to `None` where applicable.
* Refined parameter types for better type checking and consistency.
* Added detailed docstrings for methods in the `MainWindow` class.
* Improved clarity on parameters and return types for better understanding.
* Aims to facilitate future development and maintenance.
* Refactored `search_result_to_model` to use type hints with `list` instead of `[*SearchTypes]`.
* Added detailed docstring for better understanding of parameters and return types.
* Extracted logic into helper methods for better readability and maintainability.
* Improved handling of item availability and explicit content representation.
* Changed `item_id` type from `int` to `str` for better consistency.
* Updated related list type from `list[int]` to `list[str]`.
* Added type checks for `media_type`, `item_id`, and `file_template` in `_process_url` for improved error handling.
* Enhanced docstrings for clarity and consistency across functions.
* Removed unused imports to clean up the codebase.
* Improved the structure of the `_download` function for better readability.
* Added detailed docstrings for `format_str_media` and related helper functions.
* Refactored media formatting logic to utilize dedicated functions for better readability and maintainability.
* Improved error handling in media formatting.
* Updated `file_unique_suffix` function to correct the spelling of `separator`.
- Added a safeguard to skip items in `user_lists` that do not match expected types (`UserPlaylist`, `Playlist`, or `Mix`).
- Ensured `twi_child` is only accessed when properly initialized.
- This prevents crashes during GUI interaction when unexpected data is encountered.
Robert Honz