ISS Tracker v1.4.0 - Radar Skyplot & Pass Prediction Update

New Features:

Radar Skyplot: Added a visual "Radar" view (polar plot) showing the satellite's path across the sky relative to your location (N/S/E/W). Shows the trajectory from T-5 minutes to T+15 minutes.

Next Pass Prediction: Added a prediction engine that calculates the next Acquisition of Signal (AOS) time, Loss of Signal (LOS), max elevation, and pass duration up to 24 hours in advance.

Minimum Elevation Filter: Added a configurable filter (default 10°) to the Prediction menu. The tracker will now skip "noise floor" passes and only notify you of passes that peak above your set threshold.

Modular Architecture: Refactored the monolithic codebase into modular components (orbit, ui, config) for easier maintenance and faster compilation.

Fixes & Improvements:

Timezone Labeling: Corrected the main display label from "UTC" to "Local" to accurately reflect the applied timezone offset.

UI Cleanup: Fixed screen refresh artifacts where "Calculating..." text would persist after a prediction was found.