refactor(ui): move 62 hand-written empty states onto EmptyState

The admin sections, the cycle, illness, medication, mood, records and
settings cards, the pickers and dialogs said nothing-here-yet in a
hand-written muted paragraph in five sizes and three alignments. List
and section states now render through EmptyState (plain, compact; the
three with a next step carry it as the action), and the six chart
bodies through ChartEmptyState at their former height. The thirteen
that stay are a field without a value or a hint inside an editor, not
a list state. The ratchet ceiling drops from 75 to 13.

src/components/day/day-view.tsx

@@ -44,6 +44,7 @@ import { tileKeyOf } from "./day-values-model";
 import { shiftDateKey } from "./day-url";
 import { useDay, usePrefetchDay } from "./use-day";
 import { useDayValueFormat } from "./use-day-value-format";
+import { EmptyState } from "@/components/ui/empty-state";
 
 /**
  * One day, as the layer shows it in every shell: a header with the date and
@@ -282,9 +283,12 @@ export function DayView({
         ) : data === undefined ? (
           <DaySkeleton />
         ) : isEmpty ? (
-          <p className="text-muted-foreground text-sm" data-slot="day-empty">
-            {t("day.empty")}
-          </p>
+          <EmptyState
+            variant="plain"
+            size="compact"
+            title={t("day.empty")}
+            data-slot="day-empty"
+          />
         ) : (
           <>
             <DayRunning items={data.running} date={date} />