feat(ui): bütçe sayfası, limit düzenleyici ve dashboard uyarısı

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

src/app/(app)/butce/page.tsx

@@ -0,0 +1,24 @@
+import type { Metadata } from "next";
+import { notFound } from "next/navigation";
+import { PageHeader } from "@/components/page-header";
+import { BudgetView } from "@/features/budgets/components/budget-view";
+import { getBudget } from "@/features/budgets/service";
+import { tr } from "@/i18n/tr";
+import { requireActiveHousehold } from "@/lib/dal";
+import { budgetMonthSchema } from "@/shared/schemas/budget";
+
+export const metadata: Metadata = { title: tr.budget.title };
+
+/** /butce?ay=YYYY-MM — aylık bütçe (varsayılan: içinde bulunulan bütçe ayı). */
+export default async function BudgetPage({ searchParams }: PageProps<"/butce">) {
+  const { user, household } = await requireActiveHousehold("viewer");
+  const ay = budgetMonthSchema.safeParse((await searchParams).ay);
+  const data = await getBudget(user.id, household.id, ay.success ? ay.data : undefined);
+  if (!data) notFound();
+  return (
+    <>
+      <PageHeader title={tr.budget.title} description={tr.budget.description} />
+      <BudgetView key={data.month} data={data} />
+    </>
+  );
+}