• Added a new Light theme with system-aware Auto-Detect, and a manual theme switcher.
• Made the GUI more consistent and polished.
• Fixed several minor bugs.
• Enhanced multi-URL handling for more reliable behavior.
• Refactored code for better maintainability and robustness.

NOTE: This is expected to be the last planned update for the foreseeable future; future work will be limited to maintenance to keep the add-on functional.