feat(admin): Server Action'larla kullanıcı yönetimi ve gerçek oturumlu sayfalar

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

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

@@ -2,9 +2,9 @@ import type { Metadata } from "next";
 import { Suspense } from "react";
 import { PageHeader } from "@/components/page-header";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
-import { MOCK_SESSION_USER } from "@/features/auth/mock";
 import { SummaryCardsSkeleton } from "@/features/dashboard/components/summary-cards-skeleton";
 import { tr } from "@/i18n/tr";
+import { requireSession } from "@/lib/dal";
 import { cn } from "@/lib/utils";
 import { formatMoney } from "@/shared/format";
 
@@ -51,8 +51,8 @@ async function SummaryCards() {
   );
 }
 
-export default function DashboardPage() {
-  const user = MOCK_SESSION_USER;
+export default async function DashboardPage() {
+  const user = await requireSession();
   return (
     <>
       <PageHeader