style(storybook): refine patterns data and layout stories

src/patterns/dashboard-layout.stories.css

@@ -180,3 +180,15 @@
 }
 
 /* Compact geometry is shared by all viewports. Dashboard's native scroll frame preserves its minimum width. */
+
+/* Representative page only: the Dashboard grows with its content instead of being fixed to 100dvh, so the content surface has no
+   inner vertical scrollbar and the Storybook page itself scrolls. The body's `flex: 1 1 0` is a vertical share of the fixed height,
+   so it becomes content-sized; `dashboard-main` keeps its own `flex: 1 1 0`, which is its horizontal fill inside the body row.
+   The package's rules (fixed height, overflow-y: auto) stay as they are for operating screens; the horizontal scroll frame
+   (min-width 960px) is unchanged. */
+.dashboard-all-page [data-slot="dashboard-scroll"] {
+  height: auto;
+}
+.dashboard-all-page [data-slot="dashboard-body"] {
+  flex: 0 0 auto;
+}