feat(ui): dashboard ana grafiği ve rapor sayfaları

- dashboard: periyot seçici ve kümülatif/dönemsel görünüm, tablo; günlük plan kartı sadeleşti
- /raporlar özet ve kategori, trend, kişi/hesap, bütçe sayfaları; ay seçici ve CSV indirme

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/features/dashboard/components/overview-card.tsx

@@ -0,0 +1,24 @@
+import { OVERVIEW_PERIODS, type OverviewPeriod } from "@/shared/overview";
+import { getOverview } from "../service";
+import { OverviewChart } from "./overview-chart";
+
+type Search = Record<string, string | string[] | undefined>;
+
+const periodOf = (x: unknown): OverviewPeriod =>
+  OVERVIEW_PERIODS.includes(x as OverviewPeriod) ? (x as OverviewPeriod) : "month";
+
+/** Dashboard ana grafiği (sunucu): ?periyot=week|month|half|year&gorunum=kumulatif|donemsel. */
+export async function OverviewCard({
+  userId,
+  householdId,
+  searchParams,
+}: {
+  userId: string;
+  householdId: string;
+  searchParams: Promise<Search>;
+}) {
+  const q = await searchParams;
+  const data = await getOverview(userId, householdId, periodOf(q.periyot));
+  if (!data) return null;
+  return <OverviewChart data={data} view={q.gorunum === "donemsel" ? "periodic" : "cumulative"} />;
+}