- Updated `preview_stft` function to accept both DataFrame and list of DataFrames.
- Added support for multiple subplots when a list of DataFrames is provided.
- Improved color mapping and axis labeling in plots.
- Adjusted figure saving options for better output formats.
- Refactored code to reduce redundancy in plotting logic for Sensor A and Sensor B.
- Added predictions using SVM models for processed data.
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