Motivation:
The save button's style was originally an overly bright gradient, making it feel out of place compared to the frosted glass aesthetics. Additionally, the user requested the ability to close the modal using the Escape key.
Implementation:
1. Updated '.llm-pm-actions-right button:last-child' CSS to use a restrained translucent background similar to the sidebar items, keeping it cohesive with the glassmorphism design.
2. Added a global 'keydown' listener on 'Escape' inside 'ProviderManager.show()' which correctly triggers 'closeModal()' (also checking for unsaved changes) and automatically removes itself when closed.
科林_Cyril Pilgrim