v1.2.0 - Compact Layout & PWA features

Release v1.2.0 adds a brand-new interface customization setting: Compact Mode. It scales down relative font sizes globally to 15px, reduces paddings and margins for dashboard pages, cards, rows, and widgets, and arranges the Monitor widget rows into a highly dense 2-column grid layout on both desktop and mobile viewports. The mobile header has been redesigned to hide time and theme selectors for optimal screen space usage. Modals are now mounted to document.body via a portal action to prevent stacking context clipping. Finally, a Service Worker dynamic cache strategy has been implemented to enable PWA support for offline caching and load acceleration.