Initial commit: HMDesignSystem baseline

packages/ui/src/theme/overlay.css

@@ -0,0 +1,5 @@
+/* The existing shadcn 10% overlay, now theme-derived. */
+[data-slot="dialog-overlay"], [data-slot="alert-dialog-overlay"],
+[data-slot="sheet-overlay"], [data-slot="drawer-overlay"] {
+  background-color: var(--hm-sem-overlay-background);
+}