Draw a round dashboard in the mosaic as its circle with a dot per face

DashboardSummary carries the dashboard's shape, so the list no longer lays
a round dashboard's faces out at grid places they never use.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WgBfkm4rCmtd1T4vHWjEPx

frontend/src/components/Common/DashboardMosaic.tsx

@@ -65,6 +65,9 @@ function blocksOf(footprint: WidgetFootprint[]): {
  * dashboard. The summary carries the shapes, so it costs no request either.
  */
 function Footprint({ dashboard }: { dashboard: DashboardSummary }) {
+  if (dashboard.shape === "round") {
+    return <RoundFootprint faces={dashboard.footprint ?? []} />
+  }
   const { blocks, rows } = blocksOf(dashboard.footprint ?? [])
   const columns = dashboard.columns || DEFAULT_COLUMNS
   // Before the editor could place things, every widget was written at 0,0;
@@ -112,6 +115,31 @@ function Footprint({ dashboard }: { dashboard: DashboardSummary }) {
   )
 }
 
+/**
+ * A round dashboard shows one face at a time, so its grid places mean
+ * nothing: it is drawn as the circle, with a dot per face where a panel puts
+ * its page dots.
+ */
+function RoundFootprint({ faces }: { faces: WidgetFootprint[] }) {
+  return (
+    <div
+      aria-hidden
+      className="flex aspect-video items-center justify-center rounded-sm bg-muted p-1"
+    >
+      <div className="relative aspect-square h-full rounded-full border-2 border-primary/45">
+        <div className="absolute inset-x-[15%] bottom-[15%] flex flex-wrap justify-center gap-1">
+          {faces.map((face, index) => (
+            <span
+              key={index}
+              className={cn("size-2 rounded-full", shade(face.type))}
+            />
+          ))}
+        </div>
+      </div>
+    </div>
+  )
+}
+
 /** One dashboard in the mosaic. */
 function Tile({
   dashboard,