refactor(frontend): prefix css variables (UI) (#14739)

* refactor(frontend): prefix css variables

* `MI_UI` -> `MI`

* fix

* `stickyBottom`

* stickyTop

packages/frontend/src/ui/deck/column.vue

@@ -332,8 +332,8 @@ function onDrop(ev) {
 
 	&.naked {
 		background: var(--MI_THEME-acrylicBg) !important;
-		-webkit-backdrop-filter: var(--blur, blur(10px));
-		backdrop-filter: var(--blur, blur(10px));
+		-webkit-backdrop-filter: var(--MI-blur, blur(10px));
+		backdrop-filter: var(--MI-blur, blur(10px));
 
 		> .header {
 			background: transparent;

packages/frontend/src/ui/deck/widgets-column.vue

@@ -57,10 +57,10 @@ const menu = [{
 
 <style lang="scss" module>
 .root {
-	--margin: 8px;
+	--MI-margin: 8px;
 	--MI_THEME-panelBorder: none;
 
-	padding: 0 var(--margin);
+	padding: 0 var(--MI-margin);
 }
 
 .intro {