refactor(frontend): prefix css variables (#14725)

* wip

* Update index.d.ts

* remove unnecessary codes

packages/frontend-shared/themes/_light.json5

@@ -30,7 +30,7 @@
 		panelHeaderBg: ':lighten<3<@panel',
 		panelHeaderFg: '@fg',
 		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
-		panelBorder: '" solid 1px var(--divider)',
+		panelBorder: '" solid 1px var(--MI_THEME-divider)',
 		acrylicPanel: ':alpha<0.5<@panel',
 		windowHeader: ':alpha<0.85<@panel',
 		popup: ':lighten<3<@panel',
@@ -67,7 +67,6 @@
 		switchOnFg: '@fgOnAccent',
 		inputBorder: 'rgba(0, 0, 0, 0.1)',
 		inputBorderHover: 'rgba(0, 0, 0, 0.2)',
-		listItemHoverBg: 'rgba(0, 0, 0, 0.03)',
 		driveFolderBg: ':alpha<0.3<@accent',
 		wallpaperOverlay: 'rgba(255, 255, 255, 0.5)',
 		badge: '#31b1ce',