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

packages/widgets/src/traefik/component.module.css

@@ -39,7 +39,7 @@
   gap: clamp(5px, 2cqi, 8px);
   padding: clamp(6px, 3cqi, 10px);
   border-radius: var(--mantine-radius-sm);
-  background: light-dark(var(--mantine-color-gray-0), var(--mantine-color-dark-6));
+  background-color: transparent;
 }
 
 .metricIcon {
@@ -75,7 +75,7 @@
 .protocolCard {
   min-width: 0;
   padding: clamp(6px, 3cqi, 10px);
-  border: 1px solid light-dark(var(--mantine-color-gray-2), var(--mantine-color-dark-4));
+  border: 1px solid rgb(from var(--mantine-color-default-border) r g b / calc(var(--opacity, 1) * 0.45));
   border-radius: var(--mantine-radius-sm);
 }