fix(ui) : simplify admin controls and artifact selection

components/ui/button.tsx

@@ -15,6 +15,8 @@ const buttonVariants = cva(
           "border-control-border bg-control text-secondary-foreground hover:border-control-border-hover hover:bg-control-hover aria-expanded:border-primary aria-expanded:bg-primary/15 aria-expanded:text-primary",
         ghost:
           "border-control-border bg-control text-foreground hover:border-control-border-hover hover:bg-control-hover aria-expanded:border-primary aria-expanded:bg-primary/15 aria-expanded:text-primary aria-[current=page]:border-primary aria-[current=page]:bg-primary/15 aria-[current=page]:text-primary",
+        plain:
+          "border-transparent bg-transparent hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground",
         destructive:
           "border-destructive bg-destructive/20 text-destructive hover:bg-destructive/30 focus-visible:border-destructive focus-visible:ring-destructive/40",
         link: "border-transparent text-primary underline underline-offset-4 hover:decoration-2",

components/ui/combobox.tsx

@@ -62,7 +62,7 @@ function ComboboxClear({ className, ...props }: ComboboxPrimitive.Clear.Props) {
   return (
     <ComboboxPrimitive.Clear
       data-slot="combobox-clear"
-      render={<InputGroupButton variant="ghost" size="icon-xs" />}
+      render={<InputGroupButton variant="plain" size="icon-xs" />}
       className={cn(className)}
       {...props}
     >
@@ -275,7 +275,7 @@ function ComboboxChip({
       {children}
       {showRemove && (
         <ComboboxPrimitive.ChipRemove
-          render={<Button variant="ghost" size="icon-xs" />}
+          render={<Button variant="plain" size="icon-xs" />}
           className="-ml-1 opacity-50 hover:opacity-100"
           data-slot="combobox-chip-remove"
         >

components/ui/dialog.tsx

@@ -64,7 +64,7 @@ function DialogContent({
             data-slot="dialog-close"
             render={
               <Button
-                variant="ghost"
+                variant="plain"
                 className="absolute top-2 right-2"
                 size="icon-sm"
               />

components/ui/sheet.tsx

@@ -64,7 +64,7 @@ function SheetContent({
             data-slot="sheet-close"
             render={
               <Button
-                variant="ghost"
+                variant="plain"
                 className="absolute top-3 right-3"
                 size="icon-sm"
               />