fix: restore translucent dashboard styling (#6664)

* fix: restore translucent dashboard styling

* fix: restore dashboard widget transparency

* fix: address dashboard review feedback

* fix: apply board opacity to containers

* fix: flatten demo board container

* fix: default board roundness to sm

* fix: restore assistant widget transparency

* Revert "fix: default board roundness to sm"

This reverts commit c235cbdf2b.

* fix: address remaining dashboard review comments

* test: align grid geometry expectations

apps/nextjs/src/components/assistant/assistant-widget.tsx

@@ -137,7 +137,7 @@ const CompactAssistantWidget = ({
     <Box className={classes.widgetPanel}>
       <Group className={classes.compactState} justify="space-between" wrap="nowrap" gap="sm">
         <Group wrap="nowrap" gap="xs" miw={0}>
-          <ThemeIcon variant="light" color="red" radius="xl" size="lg" flex="0 0 auto">
+          <ThemeIcon variant="light" radius="xl" size="lg" flex="0 0 auto">
             <IconRobot size={19} />
           </ThemeIcon>
           <Stack className={classes.compactCopy} gap={1}>
@@ -167,13 +167,7 @@ interface AssistantWidgetStateProps {
   children?: ReactNode;
 }
 
-const AssistantWidgetState = ({
-  icon: Icon,
-  title,
-  description,
-  color = "red",
-  children,
-}: AssistantWidgetStateProps) => (
+const AssistantWidgetState = ({ icon: Icon, title, description, color, children }: AssistantWidgetStateProps) => (
   <Center className={classes.widgetState} h="100%" p="md">
     <Stack align="center" gap="sm" ta="center" maw={360}>
       <ThemeIcon variant="light" color={color} radius="xl" size="xl">