style(storybook): refine search and date story layout

src/components/calendar.stories.tsx

@@ -48,22 +48,22 @@ function TwoMonths() {
   return box(<Calendar mode="single" numberOfMonths={2} defaultMonth={month} today={today} />)
 }
 
-const sections = [
-  { id: "single", label: "Single", node: <Single showValue={false} /> },
-  { id: "disabled", label: "Disabled dates", node: <DisabledDates /> },
-  { id: "range", label: "Range", node: <Range /> },
-  { id: "months", label: "Two months", node: <TwoMonths /> },
-]
+// Same 3-column track as the Form pages (1 column on narrow screens). Each cell is a one-specimen StateBoard so subtitles, dividers and
+// specimen tops line up; the wide Two months specimen takes two tracks (the full row on narrow screens).
+const Grid = ({ children }: { children: ReactNode }) => (
+  <div className="grid items-start gap-6 [grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr))] min-[1000px]:grid-cols-3">{children}</div>
+)
+const Cell = ({ id, label, wide, children }: { id: string; label: string; wide?: boolean; children: ReactNode }) => (
+  <div className={wide ? "col-span-full min-w-0 min-[1000px]:col-span-2" : "min-w-0"}>
+    <StateBoard min={10000} states={[{ id, label, children }]} />
+  </div>
+)
 
 // No `component`: Calendar props are a union of selection modes, so Stories without args would not type-check.
 const meta = { title: "Components/Search & Date/Calendar", parameters: { layout: "padded" } } satisfies Meta
 export default meta
 type Story = StoryObj<typeof meta>
 
-const board = (...ids: string[]) => (
-  <StateBoard min={300} states={sections.filter((s) => ids.includes(s.id)).map((s) => ({ id: s.id, label: s.label, wide: s.id === "months", children: s.node }))} />
-)
-
 // Representative Story: the common Story page; the sections group the same specimens.
 export const All: Story = {
   name: "Calendar",
@@ -71,9 +71,18 @@ export const All: Story = {
   render: () => (
     <StoryPage>
       <StoryPageHeader title="Calendar" />
-      <StorySection title="Overview">{board("single")}</StorySection>
-      <StorySection title="Variants">{board("range", "months")}</StorySection>
-      <StorySection title="States">{board("disabled")}</StorySection>
+      <StorySection title="Variants">
+        <Grid>
+          <Cell id="single" label="Single"><Single showValue={false} /></Cell>
+          <Cell id="range" label="Range"><Range /></Cell>
+          <Cell id="months" label="Two months" wide><TwoMonths /></Cell>
+        </Grid>
+      </StorySection>
+      <StorySection title="States">
+        <Grid>
+          <Cell id="disabled" label="Disabled dates"><DisabledDates /></Cell>
+        </Grid>
+      </StorySection>
     </StoryPage>
   ),
 }