feat: Faz 5 - haneler, roller ve veri izolasyonu

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

CHANGELOG.md

@@ -6,6 +6,32 @@ Biçim [Keep a Changelog](https://keepachangelog.com/tr-TR/1.1.0/) esas alınır
 
 ## [Yayınlanmamış]
 
+## [0.5.0] - 2026-11-05
+
+Faz 5: Haneler, hane içi roller ve veri izolasyonu.
+
+### Eklendi
+
+- Hane içi roller (`viewer < member < owner`) ve kuralları: son sahip düşürülemez veya çıkarılamaz.
+- DAL: `getHouseholdContext` (istek başına tek okuma), `requireActiveHousehold(minRole)`, `getHouseholdActionContext(minRole)`, `requireHouseholdMember(householdId, minRole)`. Sistem admini için hane verisinde ayrıcalık yok.
+- Hane servisi (`features/households/service.ts`, framework'ten bağımsız): her hane kapsamlı fonksiyon üyeliği kendisi de doğrular; hane oluşturma + ilk sahip + denetim kaydı tek MongoDB transaction'ında.
+- Aktif hane seçici (üst bar): seçim sunucuda doğrulanır, `butcem.hh` cookie'sine yazılır; geçersiz/uydurma cookie yok sayılır. Tercih yoksa en yüksek rolün olduğu hane açılır.
+- `/ayarlar`: hane adı, bütçe ayı başlangıç günü, taksit modu, günlük plan dağıtımı, "yalnızca ben" hesaplarının toplamlara dahil edilmesi, ek mağaza tasarruf eşiği; üye rolleri ve üye çıkarma (yalnızca sahip; diğer roller salt okunur).
+- `/admin/haneler`: hane oluşturma (ilk sahip seçerek), kullanıcıyı haneye ekleme, hane içi rol değiştirme, üye çıkarma.
+- `/hane-yok`: hiçbir haneye üye olmayan kullanıcılar için yönlendirme sayfası.
+- Denetim kaydı (`auditLogs`): hane ayarları, üye ekleme/rol/çıkarma, hane oluşturma ve tüm admin kullanıcı işlemleri (oluşturma, düzenleme, rol, şifre sıfırlama, askı, silme).
+- Migration mekanizması: `npm run migrate`, `scripts/migrations/NNN-*.ts`, uygulananlar `migrations` koleksiyonunda; `001-initial-indexes`. Seed önce migration'ları çalıştırır.
+- Veri izolasyonu entegrasyon testleri (başka hanenin üyeliği/ayrıntısı/ayarları, rol yetersizliği, uydurma ve enjeksiyon denemesi kimlikler, hanesi olmayan admin, çapraz hane üyelik değişikliği, son sahip, transaction).
+
+### Değişti
+
+- İzleyici (viewer) rolünde Hızlı ekle gizlenir/pasifleşir.
+- Kullanıcı silindiğinde tüm hane üyelikleri de temizlenir.
+
+### Kaldırıldı
+
+- Hane mock verisi.
+
 ## [0.4.0] - 2026-11-05
 
 Faz 4: Örnek test verisi.
@@ -94,7 +120,8 @@ Faz 1: Framework, klasör yapısı ve altyapı.
 - `.nvmrc` (Node 26), `engines.node`, `typecheck`, `test`, `format`, `db:up`, `seed` scriptleri.
 - `docs/PROMPT.md` (ana prompt ve Faz 0 kararları), `README.md`, `CHANGELOG.md`.
 
-[Yayınlanmamış]: https://gitea.ta1sph.info/suphicakir/butcem/compare/v0.4.0...HEAD
+[Yayınlanmamış]: https://gitea.ta1sph.info/suphicakir/butcem/compare/v0.5.0...HEAD
+[0.5.0]: https://gitea.ta1sph.info/suphicakir/butcem/compare/v0.4.0...v0.5.0
 [0.4.0]: https://gitea.ta1sph.info/suphicakir/butcem/compare/v0.3.0...v0.4.0
 [0.3.0]: https://gitea.ta1sph.info/suphicakir/butcem/compare/v0.2.0...v0.3.0
 [0.2.0]: https://gitea.ta1sph.info/suphicakir/butcem/compare/v0.1.0...v0.2.0

README.md

@@ -63,6 +63,12 @@ Giriş kullanıcı adı **veya** e-posta ile yapılır. Kayıt kapalıdır; kull
 | `npm run db:up` / `db:down`   | Lokal MongoDB'yi başlat / durdur |
 | `npm run seed` / `seed:reset` | Örnek veri (Faz 4)               |
 
+## Haneler ve yetki
+
+- Tüm alan verisi bir **haneye** (`householdId`) aittir; kullanıcı yalnızca üyesi olduğu hanelerin verisini görür. Sistem admini de bu kurala tabidir.
+- Hane içi roller: **sahip** (ayarlar, üyeler), **üye** (veri girer), **izleyici** (yalnızca görüntüler).
+- Her sayfa, Server Action ve API, hane yetkisini `src/lib/dal.ts` üzerinden sunucuda doğrular; servisler de üyeliği ayrıca kontrol eder.
+
 ## Marka dosyaları
 
 `public/brand/`: `logo.svg` (açık tema), `logo-dark.svg` (koyu tema), `icon.svg` (uygulama ikonu), `icon-maskable.svg` (Android/iOS, köşesiz). Yazı Noto Sans Bold (OFL) harf yollarıdır. İkonları değiştirdikten sonra `npm run icons` çalıştırın; favicon ve PWA ikonları bu kaynaklardan üretilir.

docs/PROMPT.md

@@ -317,6 +317,7 @@ Aşağıdakileri varsayılan olarak kabul ettim. Faz 0'da yalnızca bunlardan em
 - **Değerleme:** varlıklar ve aynî alacaklar **alış** fiyatıyla, aynî borçlar **satış** fiyatıyla değerlenir. Tek fiyat girilirse ikisine de yazılır.
 - **URL'ler:** ekran yolları Türkçe ASCII (`/islemler`, `/butce`); kod, koleksiyon adları ve `/api/v1` İngilizce.
 - **Canlı domain:** `butcem.ta1sph.website` (Gitea `gitea.ta1sph.info` üzerinde; fark kasıtlı).
+- **Aktif hane varsayılanı:** tercih (cookie) yoksa kullanıcının en yüksek rolde olduğu hane açılır.
 - **Lokal MongoDB portu:** host'ta `27019` (27017 ve 27018 geliştirme makinesinde dolu). `BUTCEM_MONGO_PORT` ile değiştirilebilir.
 
 ---

package.json

@@ -1,6 +1,6 @@
 {
   "name": "butcem",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "private": true,
   "description": "BÜTÇEM — aile bütçe, cari, birikim, ev stoğu ve akıllı alışveriş uygulaması",
   "engines": {
@@ -21,7 +21,8 @@
     "seed": "tsx --conditions=react-server --env-file=.env.local scripts/seed.ts",
     "seed:reset": "tsx --conditions=react-server --env-file=.env.local scripts/seed.ts --reset",
     "icons": "tsx scripts/generate-icons.ts",
-    "test:integration": "vitest run --config vitest.integration.config.mts"
+    "test:integration": "vitest run --config vitest.integration.config.mts",
+    "migrate": "tsx --conditions=react-server --env-file=.env.local scripts/migrate.ts"
   },
   "dependencies": {
     "@hookform/resolvers": "^7.0.2",

scripts/migrate.ts

@@ -0,0 +1,17 @@
+/**
+ * Migration'ları uygular: npm run migrate (canlıda deploy sonrası; bkz. docs/DEPLOY.md, Faz 15).
+ * `server-only` modülleri Next dışında yükleyebilmek için --conditions=react-server ile çalışır.
+ */
+import mongoose from "mongoose";
+import { getMongoClient } from "@/lib/db/mongo";
+import { runMigrations } from "./migrations";
+
+runMigrations()
+  .catch((err: unknown) => {
+    console.error(err instanceof Error ? err.message : err);
+    process.exitCode = 1;
+  })
+  .finally(async () => {
+    await mongoose.disconnect();
+    await getMongoClient().close();
+  });

scripts/migrations/001-initial-indexes.ts

@@ -0,0 +1,15 @@
+import { AuditLogModel } from "@/models/audit-log";
+import { HouseholdModel } from "@/models/household";
+import { HouseholdMemberModel } from "@/models/household-member";
+import type { Migration } from "./types";
+
+/** Hane, üyelik ve denetim kaydı index'leri (Mongoose şemalarındaki tanımlarla). */
+export const migration: Migration = {
+  name: "001-initial-indexes",
+  description: "households, householdMembers ve auditLogs index'leri",
+  async up() {
+    await HouseholdModel.createIndexes();
+    await HouseholdMemberModel.createIndexes();
+    await AuditLogModel.createIndexes();
+  },
+};

scripts/migrations/index.ts

@@ -0,0 +1,35 @@
+import { getDb } from "@/lib/db/mongo";
+import { connectMongoose } from "@/lib/db/mongoose";
+import { migration as m001 } from "./001-initial-indexes";
+import type { Migration } from "./types";
+
+/** Sıralı migration listesi. Yeni migration: dosyayı ekle ve buraya sırayla ekle. */
+export const MIGRATIONS: Migration[] = [m001];
+
+const COLLECTION = "migrations";
+
+/**
+ * Uygulanmamış migration'ları sırayla çalıştırır; her biri bir kez (`migrations` koleksiyonu).
+ * Aynı anda iki çalıştırma olursa benzersiz `name` index'i ikinci kaydı reddeder.
+ */
+export async function runMigrations(log: (line: string) => void = console.log): Promise<string[]> {
+  const db = getDb();
+  await connectMongoose();
+  const col = db.collection<{ name: string; appliedAt: Date; durationMs: number }>(COLLECTION);
+  await col.createIndex({ name: 1 }, { unique: true });
+  const applied = new Set(
+    (await col.find({}, { projection: { name: 1 } }).toArray()).map((d) => d.name),
+  );
+
+  const ran: string[] = [];
+  for (const m of MIGRATIONS) {
+    if (applied.has(m.name)) continue;
+    const started = Date.now();
+    await m.up(db);
+    await col.insertOne({ name: m.name, appliedAt: new Date(), durationMs: Date.now() - started });
+    ran.push(m.name);
+    log(`✓ Migration: ${m.name} — ${m.description}`);
+  }
+  if (!ran.length) log("• Bekleyen migration yok.");
+  return ran;
+}

scripts/migrations/types.ts

@@ -0,0 +1,8 @@
+import type { Db } from "mongodb";
+
+/** Bir migration: adı dosya adıyla aynı olmalı (ör. "001-initial-indexes"). Geri alma yok; ileri yönlü. */
+export type Migration = {
+  name: string;
+  description: string;
+  up: (db: Db) => Promise<void>;
+};

scripts/seed/run.ts

@@ -6,6 +6,7 @@ import { env } from "@/lib/env";
 import { HouseholdModel } from "@/models/household";
 import { HouseholdMemberModel } from "@/models/household-member";
 import { storedEmail } from "@/shared/account-email";
+import { runMigrations } from "../migrations";
 import { ADMIN_USERNAME, SEED_HOUSEHOLDS, SEED_USERS, type SeedUser } from "./fixtures";
 
 /**
@@ -30,7 +31,7 @@ export type SeedSummary = {
 };
 
 const AUTH_COLLECTIONS = ["user", "account", "session", "verification", "rateLimit"];
-const DOMAIN_COLLECTIONS = ["households", "householdMembers"];
+const DOMAIN_COLLECTIONS = ["households", "householdMembers", "auditLogs"];
 
 type AuthApi = ReturnType<typeof getAuth>["api"];
 
@@ -83,9 +84,8 @@ export async function runSeed({
     log("• Kimlik doğrulama ve hane koleksiyonları temizlendi.");
   }
 
-  // Index'ler (production'da Mongoose autoIndex kapalı olduğu için açıkça oluşturulur).
-  await HouseholdModel.createIndexes();
-  await HouseholdMemberModel.createIndexes();
+  // Index'ler ve şema değişiklikleri (production'da Mongoose autoIndex kapalı).
+  await runMigrations(log);
 
   // 1) Admin
   const adminEmail = e.SEED_ADMIN_EMAIL.toLowerCase();

src/app/(app)/admin/haneler/page.tsx

@@ -0,0 +1,18 @@
+import type { Metadata } from "next";
+import { PageHeader } from "@/components/page-header";
+import { HouseholdsAdmin } from "@/features/admin-households/components/households-admin";
+import { getAdminHouseholdsData } from "@/features/admin-households/queries";
+import { tr } from "@/i18n/tr";
+import { requireRole } from "@/lib/dal";
+
+export const metadata: Metadata = { title: tr.adminHouseholds.title };
+
+export default async function AdminHouseholdsPage() {
+  const [admin, data] = await Promise.all([requireRole("admin"), getAdminHouseholdsData()]);
+  return (
+    <>
+      <PageHeader title={tr.adminHouseholds.title} description={tr.adminHouseholds.description} />
+      <HouseholdsAdmin households={data.households} users={data.users} currentUserId={admin.id} />
+    </>
+  );
+}

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

@@ -0,0 +1,50 @@
+import type { Metadata } from "next";
+import { notFound } from "next/navigation";
+import { PageHeader } from "@/components/page-header";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { HouseholdSettingsForm } from "@/features/households/components/household-settings-form";
+import { SettingsMembers } from "@/features/households/components/settings-members";
+import { getHouseholdDetail } from "@/features/households/service";
+import { tr } from "@/i18n/tr";
+import { requireActiveHousehold } from "@/lib/dal";
+
+export const metadata: Metadata = { title: tr.settings.title };
+
+export default async function SettingsPage() {
+  const { user, household } = await requireActiveHousehold("viewer");
+  const detail = await getHouseholdDetail(user.id, household.id);
+  if (!detail) notFound();
+  const isOwner = household.role === "owner";
+  const t = tr.settings;
+
+  return (
+    <>
+      <PageHeader title={t.title} description={t.description} />
+      <div className="grid gap-4 lg:grid-cols-2 lg:items-start">
+        <Card>
+          <CardHeader>
+            <CardTitle>{t.household}</CardTitle>
+            <CardDescription>{isOwner ? t.householdDescription : t.ownerOnly}</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <HouseholdSettingsForm settings={detail.settings} canEdit={isOwner} />
+          </CardContent>
+        </Card>
+        <Card>
+          <CardHeader>
+            <CardTitle>{t.members}</CardTitle>
+            <CardDescription>{t.membersDescription}</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <SettingsMembers
+              members={detail.members}
+              householdName={detail.name}
+              currentUserId={user.id}
+              canManage={isOwner}
+            />
+          </CardContent>
+        </Card>
+      </div>
+    </>
+  );
+}

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

@@ -4,7 +4,7 @@ import { PageHeader } from "@/components/page-header";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
 import { SummaryCardsSkeleton } from "@/features/dashboard/components/summary-cards-skeleton";
 import { tr } from "@/i18n/tr";
-import { requireSession } from "@/lib/dal";
+import { requireActiveHousehold } from "@/lib/dal";
 import { cn } from "@/lib/utils";
 import { formatMoney } from "@/shared/format";
 
@@ -52,12 +52,12 @@ async function SummaryCards() {
 }
 
 export default async function DashboardPage() {
-  const user = await requireSession();
+  const { user, household } = await requireActiveHousehold("viewer");
   return (
     <>
       <PageHeader
         title={tr.dashboard.welcome(user.name.split(" ")[0] ?? user.name)}
-        description={tr.dashboard.welcomeDescription}
+        description={`${household.name} · ${tr.dashboard.welcomeDescription}`}
       />
       <Suspense fallback={<SummaryCardsSkeleton />}>
         <SummaryCards />

src/app/(app)/hane-yok/page.tsx

@@ -0,0 +1,39 @@
+import { House } from "lucide-react";
+import type { Metadata } from "next";
+import Link from "next/link";
+import { redirect } from "next/navigation";
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { tr } from "@/i18n/tr";
+import { getHouseholdContext } from "@/lib/dal";
+
+export const metadata: Metadata = { title: tr.households.noHousehold.title };
+
+/** Hiçbir haneye üye olmayan kullanıcılar (ör. hanesi olmayan admin) buraya yönlenir. */
+export default async function NoHouseholdPage() {
+  const ctx = await getHouseholdContext();
+  if (!ctx) redirect("/login");
+  if (ctx.household) redirect("/dashboard");
+  const t = tr.households.noHousehold;
+  return (
+    <div className="flex flex-1 items-center justify-center">
+      <Card className="max-w-md">
+        <CardHeader>
+          <span className="mb-2 flex size-12 items-center justify-center rounded-full bg-primary/10 text-primary">
+            <House className="size-6" />
+          </span>
+          <CardTitle className="text-xl">{t.title}</CardTitle>
+          <CardDescription>{t.description}</CardDescription>
+        </CardHeader>
+        {ctx.user.role === "admin" ? (
+          <CardContent className="flex flex-col items-start gap-3">
+            <p className="text-sm text-muted-foreground">{t.adminHint}</p>
+            <Button asChild>
+              <Link href="/admin/haneler">{t.adminLink}</Link>
+            </Button>
+          </CardContent>
+        ) : null}
+      </Card>
+    </div>
+  );
+}

src/app/(app)/layout.tsx

@@ -1,3 +1,4 @@
+import { redirect } from "next/navigation";
 import { Suspense } from "react";
 import { AppHeader } from "@/components/layout/app-header";
 import { AppShellFallback } from "@/components/layout/app-shell-fallback";
@@ -5,8 +6,8 @@ import { AppSidebar } from "@/components/layout/app-sidebar";
 import { BottomNav } from "@/components/layout/bottom-nav";
 import { QuickAddProvider } from "@/components/layout/quick-add";
 import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar";
-import { MOCK_HOUSEHOLDS } from "@/features/households/mock";
-import { requireSession } from "@/lib/dal";
+import { hasHouseholdRole } from "@/features/households/roles";
+import { getHouseholdContext } from "@/lib/dal";
 import { APP_VERSION } from "@/lib/version";
 
 /**
@@ -23,18 +24,26 @@ export default function AppLayout({ children }: { children: React.ReactNode }) {
 }
 
 async function AuthenticatedShell({ children }: { children: React.ReactNode }) {
-  const user = await requireSession();
+  const ctx = await getHouseholdContext();
+  if (!ctx) redirect("/login");
+  const { user, household, memberships } = ctx;
+  const canWrite = household ? hasHouseholdRole(household.role, "member") : false;
   return (
     <SidebarProvider>
       <QuickAddProvider>
         <AppSidebar isAdmin={user.role === "admin"} version={APP_VERSION} />
         <SidebarInset>
-          {/* FAZ 5: kullanıcının üye olduğu haneler */}
-          <AppHeader user={user} households={MOCK_HOUSEHOLDS} version={APP_VERSION} />
+          <AppHeader
+            user={user}
+            households={memberships}
+            activeHouseholdId={household?.id}
+            canWrite={canWrite}
+            version={APP_VERSION}
+          />
           {/* Mobilde alt menü yüksekliği kadar boşluk */}
           <div className="flex flex-1 flex-col gap-4 p-4 pb-24 md:p-6 md:pb-6">{children}</div>
         </SidebarInset>
-        <BottomNav />
+        <BottomNav canWrite={canWrite} />
       </QuickAddProvider>
     </SidebarProvider>
   );

src/components/layout/app-header.tsx

@@ -11,18 +11,23 @@ import { UserMenu } from "./user-menu";
 export function AppHeader({
   user,
   households,
+  activeHouseholdId,
+  canWrite,
   version,
 }: {
   user: SessionUser;
   households: HouseholdSummary[];
+  activeHouseholdId: string | undefined;
+  /** Aktif hanede en az "member" mi? (İzleyici veri giremez.) */
+  canWrite: boolean;
   version: string;
 }) {
   return (
     <header className="sticky top-0 z-30 flex h-14 items-center gap-2 border-b bg-background/95 px-3 backdrop-blur supports-backdrop-filter:bg-background/80 md:px-4">
       <SidebarTrigger className="hidden md:inline-flex" aria-label={tr.nav.toggleSidebar} />
-      <HouseholdSwitcher households={households} />
+      <HouseholdSwitcher households={households} activeId={activeHouseholdId} />
       <div className="ml-auto flex items-center gap-1">
-        <QuickAddButton className="hidden md:inline-flex" />
+        {canWrite ? <QuickAddButton className="hidden md:inline-flex" /> : null}
         <ThemeToggle />
         <UserMenu user={user} version={version} />
       </div>

src/components/layout/bottom-nav.tsx

@@ -40,7 +40,7 @@ function BottomNavLink({ item, pathname }: { item: NavItem; pathname: string })
 }
 
 /** Mobil alt gezinme çubuğu (md altı). */
-export function BottomNav() {
+export function BottomNav({ canWrite }: { canWrite: boolean }) {
   const pathname = usePathname();
   const { openQuickAdd } = useQuickAdd();
   const { setOpenMobile } = useSidebar();
@@ -57,8 +57,10 @@ export function BottomNav() {
           <button
             type="button"
             onClick={openQuickAdd}
+            disabled={!canWrite}
+            title={canWrite ? undefined : tr.households.viewerReadOnly}
             aria-label={tr.quickAdd.button}
-            className="-mt-5 flex size-14 items-center justify-center rounded-full bg-primary text-primary-foreground shadow-lg outline-none focus-visible:ring-4 focus-visible:ring-ring/50"
+            className="-mt-5 flex size-14 items-center justify-center rounded-full bg-primary text-primary-foreground shadow-lg outline-none focus-visible:ring-4 focus-visible:ring-ring/50 disabled:opacity-40"
           >
             <Plus className="size-6" />
           </button>

src/components/layout/household-switcher.tsx

@@ -1,7 +1,8 @@
 "use client";
 
 import { House } from "lucide-react";
-import { useState } from "react";
+import { useTransition } from "react";
+import { toast } from "sonner";
 import {
   Select,
   SelectContent,
@@ -9,17 +10,38 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/components/ui/select";
+import { switchHouseholdAction } from "@/features/households/actions";
 import type { HouseholdSummary } from "@/features/households/types";
 import { tr } from "@/i18n/tr";
 
-/** Üst bar aktif hane seçici. FAZ 5: seçim sunucuda (cookie) saklanacak. */
-export function HouseholdSwitcher({ households }: { households: HouseholdSummary[] }) {
-  const [value, setValue] = useState(households[0]?.id);
-  const current = households.find((h) => h.id === value);
+/** Üst bar aktif hane seçici. Seçim sunucuda doğrulanır ve cookie'ye yazılır. */
+export function HouseholdSwitcher({
+  households,
+  activeId,
+}: {
+  households: HouseholdSummary[];
+  activeId: string | undefined;
+}) {
+  const [pending, startTransition] = useTransition();
+  const current = households.find((h) => h.id === activeId);
   if (households.length === 0) return null;
+
+  function onChange(id: string) {
+    if (id === activeId) return;
+    startTransition(async () => {
+      const result = await switchHouseholdAction(id);
+      if (result.ok) toast.success(tr.household.switched(result.data.name));
+      else toast.error(result.error);
+    });
+  }
+
   return (
-    <Select value={value} onValueChange={setValue}>
-      <SelectTrigger aria-label={tr.household.label} className="w-[min(46vw,13rem)]">
+    <Select value={activeId} onValueChange={onChange} disabled={pending || households.length < 2}>
+      <SelectTrigger
+        aria-label={tr.household.label}
+        className="w-[min(46vw,13rem)]"
+        aria-busy={pending}
+      >
         <House className="text-muted-foreground" />
         {/* Etiket children ile verilir: Radix aksi halde hydration'a kadar boş gösterir. */}
         <SelectValue placeholder={tr.household.select}>{current?.name}</SelectValue>

src/components/layout/nav-config.ts

@@ -25,7 +25,7 @@ export type NavItem = {
 };
 
 /** Şu an tamamlanmış en yüksek faz — sayfalar eklendikçe artar. */
-export const CURRENT_PHASE = 2;
+export const CURRENT_PHASE = 5;
 
 export const isAvailable = (item: NavItem) => item.phase <= CURRENT_PHASE;
 

src/features/admin-households/actions.ts

@@ -0,0 +1,74 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { z } from "zod";
+import {
+  adminAddMember,
+  adminCreateHousehold,
+  adminRemoveMember,
+  adminSetMemberRole,
+} from "@/features/households/service";
+import { tr } from "@/i18n/tr";
+import { fail, type ActionResult } from "@/lib/action-result";
+import { getActionUser } from "@/lib/dal";
+import {
+  addMemberSchema,
+  householdCreateSchema,
+  householdRoleSchema,
+} from "@/shared/schemas/household";
+
+/** Sistem admini: hane ve üyelik yönetimi. Hanenin finansal verisine dokunmaz. */
+
+const PATH = "/admin/haneler";
+const idSchema = z.string().regex(/^[a-f0-9]{24}$/i);
+
+export async function createHouseholdAction(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const admin = await getActionUser("admin");
+  if (!admin) return fail(tr.common.unauthorized);
+  const parsed = householdCreateSchema.safeParse(input);
+  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields);
+  const result = await adminCreateHousehold(admin.id, parsed.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}
+
+export async function addMemberAction(householdId: unknown, input: unknown): Promise<ActionResult> {
+  const admin = await getActionUser("admin");
+  if (!admin) return fail(tr.common.unauthorized);
+  const hid = idSchema.safeParse(householdId);
+  const parsed = addMemberSchema.safeParse(input);
+  if (!hid.success || !parsed.success) return fail(tr.adminUsers.errors.checkFields);
+  const result = await adminAddMember(admin.id, hid.data, parsed.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}
+
+export async function adminSetMemberRoleAction(
+  householdId: unknown,
+  userId: unknown,
+  role: unknown,
+): Promise<ActionResult> {
+  const admin = await getActionUser("admin");
+  if (!admin) return fail(tr.common.unauthorized);
+  const hid = idSchema.safeParse(householdId);
+  const uid = idSchema.safeParse(userId);
+  const r = householdRoleSchema.safeParse(role);
+  if (!hid.success || !uid.success || !r.success) return fail(tr.common.genericError);
+  const result = await adminSetMemberRole(admin.id, hid.data, uid.data, r.data);
+  if (result.ok) revalidatePath(PATH);
+  return result;
+}
+
+export async function adminRemoveMemberAction(
+  householdId: unknown,
+  userId: unknown,
+): Promise<ActionResult> {
+  const admin = await getActionUser("admin");
+  if (!admin) return fail(tr.common.unauthorized);
+  const hid = idSchema.safeParse(householdId);
+  const uid = idSchema.safeParse(userId);
+  if (!hid.success || !uid.success) return fail(tr.common.genericError);
+  const result = await adminRemoveMember(admin.id, hid.data, uid.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}

src/features/admin-households/components/households-admin.tsx

@@ -0,0 +1,306 @@
+"use client";
+
+import { zodResolver } from "@hookform/resolvers/zod";
+import { Loader2, Plus, UserPlus } from "lucide-react";
+import { useEffect, useState } from "react";
+import { Controller, useForm } from "react-hook-form";
+import { toast } from "sonner";
+import { ResponsiveDialog } from "@/components/responsive-dialog";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import {
+  Card,
+  CardAction,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { Field, FieldDescription, FieldError, FieldGroup, FieldLabel } from "@/components/ui/field";
+import { Input } from "@/components/ui/input";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { MembersList } from "@/features/households/components/members-list";
+import type { AdminHouseholdRow, UserOption } from "@/features/households/service";
+import { HOUSEHOLD_ROLES } from "@/features/households/types";
+import { tr } from "@/i18n/tr";
+import {
+  addMemberSchema,
+  householdCreateSchema,
+  type AddMemberInput,
+  type HouseholdCreateInput,
+} from "@/shared/schemas/household";
+import {
+  addMemberAction,
+  adminRemoveMemberAction,
+  adminSetMemberRoleAction,
+  createHouseholdAction,
+} from "../actions";
+import { UserSelect } from "./user-select";
+
+const t = tr.adminHouseholds;
+
+function CreateHouseholdDialog({
+  open,
+  onOpenChange,
+  users,
+}: {
+  open: boolean;
+  onOpenChange: (o: boolean) => void;
+  users: UserOption[];
+}) {
+  const form = useForm<HouseholdCreateInput>({
+    resolver: zodResolver(householdCreateSchema),
+    defaultValues: { name: "", ownerUserId: "" },
+  });
+  useEffect(() => {
+    if (open) form.reset({ name: "", ownerUserId: "" });
+  }, [open, form]);
+
+  async function onSubmit(values: HouseholdCreateInput) {
+    const result = await createHouseholdAction(values);
+    if (result.ok) {
+      toast.success(t.created(values.name));
+      onOpenChange(false);
+    } else {
+      form.setError("root", { message: result.error });
+    }
+  }
+
+  return (
+    <ResponsiveDialog
+      open={open}
+      onOpenChange={onOpenChange}
+      title={t.createTitle}
+      description={t.createDescription}
+      footer={
+        <>
+          <Button variant="outline" type="button" onClick={() => onOpenChange(false)}>
+            {tr.common.cancel}
+          </Button>
+          <Button type="submit" form="household-create" disabled={form.formState.isSubmitting}>
+            {form.formState.isSubmitting ? <Loader2 className="animate-spin" /> : null}
+            {tr.common.create}
+          </Button>
+        </>
+      }
+    >
+      <form id="household-create" onSubmit={form.handleSubmit(onSubmit)} noValidate>
+        <FieldGroup>
+          <Controller
+            name="name"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="hh-create-name">{t.name}</FieldLabel>
+                <Input {...field} id="hh-create-name" aria-invalid={fieldState.invalid} />
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="ownerUserId"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="hh-create-owner">{t.owner}</FieldLabel>
+                <UserSelect
+                  id="hh-create-owner"
+                  users={users}
+                  value={field.value}
+                  onChange={field.onChange}
+                  invalid={fieldState.invalid}
+                />
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          {form.formState.errors.root ? (
+            <FieldError>{form.formState.errors.root.message}</FieldError>
+          ) : null}
+        </FieldGroup>
+      </form>
+    </ResponsiveDialog>
+  );
+}
+
+function AddMemberDialog({
+  household,
+  users,
+  onOpenChange,
+}: {
+  household: AdminHouseholdRow | null;
+  users: UserOption[];
+  onOpenChange: (o: boolean) => void;
+}) {
+  const form = useForm<AddMemberInput>({
+    resolver: zodResolver(addMemberSchema),
+    defaultValues: { userId: "", role: "member" },
+  });
+  useEffect(() => {
+    if (household) form.reset({ userId: "", role: "member" });
+  }, [household, form]);
+
+  async function onSubmit(values: AddMemberInput) {
+    if (!household) return;
+    const result = await addMemberAction(household.id, values);
+    if (result.ok) {
+      toast.success(t.memberAdded(users.find((u) => u.id === values.userId)?.name ?? ""));
+      onOpenChange(false);
+    } else {
+      form.setError("root", { message: result.error });
+    }
+  }
+
+  return (
+    <ResponsiveDialog
+      open={Boolean(household)}
+      onOpenChange={onOpenChange}
+      title={household ? t.addMemberTitle(household.name) : t.addMember}
+      description={t.addMemberDescription}
+      footer={
+        <>
+          <Button variant="outline" type="button" onClick={() => onOpenChange(false)}>
+            {tr.common.cancel}
+          </Button>
+          <Button type="submit" form="household-add-member" disabled={form.formState.isSubmitting}>
+            {form.formState.isSubmitting ? <Loader2 className="animate-spin" /> : null}
+            {t.addMember}
+          </Button>
+        </>
+      }
+    >
+      <form id="household-add-member" onSubmit={form.handleSubmit(onSubmit)} noValidate>
+        <FieldGroup>
+          <Controller
+            name="userId"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="hh-member-user">{t.user}</FieldLabel>
+                <UserSelect
+                  id="hh-member-user"
+                  users={users}
+                  value={field.value}
+                  onChange={field.onChange}
+                  invalid={fieldState.invalid}
+                />
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="role"
+            control={form.control}
+            render={({ field }) => (
+              <Field>
+                <FieldLabel htmlFor="hh-member-role">{t.role}</FieldLabel>
+                <Select value={field.value} onValueChange={field.onChange}>
+                  <SelectTrigger
+                    id="hh-member-role"
+                    className="w-full"
+                    aria-describedby="hh-member-role-hint"
+                  >
+                    <SelectValue>{tr.household.roles[field.value]}</SelectValue>
+                  </SelectTrigger>
+                  <SelectContent>
+                    {HOUSEHOLD_ROLES.map((r) => (
+                      <SelectItem key={r} value={r}>
+                        {tr.household.roles[r]}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FieldDescription id="hh-member-role-hint">
+                  {tr.household.roleHints[field.value]}
+                </FieldDescription>
+              </Field>
+            )}
+          />
+          {form.formState.errors.root ? (
+            <FieldError>{form.formState.errors.root.message}</FieldError>
+          ) : null}
+        </FieldGroup>
+      </form>
+    </ResponsiveDialog>
+  );
+}
+
+export function HouseholdsAdmin({
+  households,
+  users,
+  currentUserId,
+}: {
+  households: AdminHouseholdRow[];
+  users: UserOption[];
+  currentUserId: string;
+}) {
+  const [creating, setCreating] = useState(false);
+  const [addingTo, setAddingTo] = useState<AdminHouseholdRow | null>(null);
+
+  return (
+    <div className="flex flex-col gap-4">
+      <div className="flex flex-wrap items-center gap-3">
+        <p className="max-w-2xl text-sm text-muted-foreground">{t.privacyNote}</p>
+        <Button className="ml-auto" onClick={() => setCreating(true)}>
+          <Plus />
+          {t.newHousehold}
+        </Button>
+      </div>
+
+      {households.length === 0 ? (
+        <p className="rounded-xl border border-dashed p-8 text-center text-muted-foreground">
+          {t.empty}
+        </p>
+      ) : (
+        <div className="grid gap-4 xl:grid-cols-2">
+          {households.map((h) => (
+            <Card key={h.id}>
+              <CardHeader>
+                <CardTitle>{h.name}</CardTitle>
+                <CardDescription className="flex flex-wrap items-center gap-2">
+                  <span>{t.members(h.memberCount)}</span>
+                  {h.owners.length ? (
+                    <span>
+                      · {t.owners}: {h.owners.join(", ")}
+                    </span>
+                  ) : (
+                    <Badge variant="destructive">{t.noOwner}</Badge>
+                  )}
+                </CardDescription>
+                <CardAction>
+                  <Button variant="outline" size="sm" onClick={() => setAddingTo(h)}>
+                    <UserPlus />
+                    {t.addMember}
+                  </Button>
+                </CardAction>
+              </CardHeader>
+              <CardContent>
+                <MembersList
+                  members={h.members}
+                  householdName={h.name}
+                  currentUserId={currentUserId}
+                  canManage
+                  onSetRole={(userId, role) => adminSetMemberRoleAction(h.id, userId, role)}
+                  onRemove={(userId) => adminRemoveMemberAction(h.id, userId)}
+                />
+              </CardContent>
+            </Card>
+          ))}
+        </div>
+      )}
+
+      <CreateHouseholdDialog open={creating} onOpenChange={setCreating} users={users} />
+      <AddMemberDialog
+        household={addingTo}
+        users={users}
+        onOpenChange={(o) => !o && setAddingTo(null)}
+      />
+    </div>
+  );
+}

src/features/admin-households/components/user-select.tsx

@@ -0,0 +1,48 @@
+"use client";
+
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import type { UserOption } from "@/features/households/service";
+import { tr } from "@/i18n/tr";
+
+/** Kullanıcı seçici (askıdakiler işaretli). */
+export function UserSelect({
+  id,
+  users,
+  value,
+  onChange,
+  invalid,
+}: {
+  id: string;
+  users: UserOption[];
+  value: string;
+  onChange: (id: string) => void;
+  invalid?: boolean;
+}) {
+  const selected = users.find((u) => u.id === value);
+  return (
+    <Select value={value || undefined} onValueChange={onChange}>
+      <SelectTrigger id={id} className="w-full" aria-invalid={invalid}>
+        <SelectValue placeholder={tr.adminHouseholds.selectUser}>
+          {selected ? `${selected.name} (@${selected.username})` : null}
+        </SelectValue>
+      </SelectTrigger>
+      <SelectContent className="max-h-72">
+        {users.map((u) => (
+          <SelectItem key={u.id} value={u.id}>
+            {u.name}
+            <span className="text-xs text-muted-foreground">
+              @{u.username}
+              {u.banned ? ` · ${tr.settings.banned}` : ""}
+            </span>
+          </SelectItem>
+        ))}
+      </SelectContent>
+    </Select>
+  );
+}

src/features/admin-households/queries.ts

@@ -0,0 +1,10 @@
+import "server-only";
+import { adminListHouseholds, adminListUserOptions } from "@/features/households/service";
+import { requireRole } from "@/lib/dal";
+
+/** Admin: haneler (üyeleriyle) ve hane atamaları için kullanıcı listesi. */
+export async function getAdminHouseholdsData() {
+  await requireRole("admin");
+  const [households, users] = await Promise.all([adminListHouseholds(), adminListUserOptions()]);
+  return { households, users };
+}

src/features/admin-users/actions.ts

@@ -7,7 +7,9 @@ import { tr } from "@/i18n/tr";
 import { fail, ok, type ActionResult } from "@/lib/action-result";
 import { getAuth } from "@/lib/auth";
 import { authErrorCode } from "@/lib/auth-errors";
+import { writeAudit } from "@/lib/audit";
 import { getActionUser } from "@/lib/dal";
+import { removeAllMembershipsOfUser } from "@/features/households/service";
 import { storedEmail } from "@/shared/account-email";
 import { systemRoleSchema, type SystemRole } from "@/shared/schemas/common";
 import {
@@ -102,8 +104,9 @@ export async function createUserAction(input: unknown): Promise<ActionResult> {
   const parsed = userCreateSchema.safeParse(input);
   if (!parsed.success) return fail(t.errors.checkFields);
   const v = parsed.data;
+  let createdId = "";
   try {
-    await ctx.api.createUser({
+    const created = await ctx.api.createUser({
       headers: ctx.headers,
       body: {
         name: v.name,
@@ -113,9 +116,17 @@ export async function createUserAction(input: unknown): Promise<ActionResult> {
         data: { username: v.username },
       },
     });
+    createdId = created.user.id;
   } catch (error) {
     return mapAuthError(error);
   }
+  await writeAudit({
+    action: "user.create",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: createdId,
+    diff: { username: v.username, role: v.role },
+  });
   revalidatePath(PATH);
   return ok(undefined);
 }
@@ -148,6 +159,13 @@ export async function updateUserAction(userId: unknown, input: unknown): Promise
   } catch (error) {
     return mapAuthError(error);
   }
+  await writeAudit({
+    action: "user.update",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: target.id,
+    diff: { name: v.name, username: v.username, role: v.role },
+  });
   revalidatePath(PATH);
   return ok(undefined);
 }
@@ -167,6 +185,13 @@ export async function setRoleAction(userId: unknown, role: unknown): Promise<Act
   } catch (error) {
     return mapAuthError(error);
   }
+  await writeAudit({
+    action: "user.role",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: target.id,
+    diff: { role: { from: target.role, to: r.data } },
+  });
   revalidatePath(PATH);
   return ok(undefined);
 }
@@ -191,6 +216,12 @@ export async function setPasswordAction(userId: unknown, input: unknown): Promis
   } catch (error) {
     return mapAuthError(error);
   }
+  await writeAudit({
+    action: "user.password.reset",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: target.id,
+  });
   return ok(undefined);
 }
 
@@ -213,6 +244,13 @@ export async function banUserAction(userId: unknown, input: unknown): Promise<Ac
   } catch (error) {
     return mapAuthError(error);
   }
+  await writeAudit({
+    action: "user.ban",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: target.id,
+    diff: { reason: parsed.data.reason ?? null },
+  });
   revalidatePath(PATH);
   return ok(undefined);
 }
@@ -227,6 +265,12 @@ export async function unbanUserAction(userId: unknown): Promise<ActionResult> {
   } catch (error) {
     return mapAuthError(error);
   }
+  await writeAudit({
+    action: "user.unban",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: id.data,
+  });
   revalidatePath(PATH);
   return ok(undefined);
 }
@@ -245,6 +289,14 @@ export async function removeUserAction(userId: unknown): Promise<ActionResult> {
   } catch (error) {
     return mapAuthError(error);
   }
+  const removedMemberships = await removeAllMembershipsOfUser(target.id);
+  await writeAudit({
+    action: "user.remove",
+    actorId: ctx.actor.id,
+    targetType: "user",
+    targetId: target.id,
+    diff: { name: target.name, removedMemberships },
+  });
   revalidatePath(PATH);
   return ok(undefined);
 }

src/features/households/actions.ts

@@ -0,0 +1,60 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { z } from "zod";
+import { tr } from "@/i18n/tr";
+import { fail, ok, type ActionResult } from "@/lib/action-result";
+import { writeActiveHouseholdId } from "@/lib/active-household";
+import { getCurrentUser, getHouseholdActionContext } from "@/lib/dal";
+import { householdRoleSchema, householdSettingsSchema } from "@/shared/schemas/household";
+import { removeMember, resolveMembership, setMemberRole, updateHouseholdSettings } from "./service";
+
+const idSchema = z.string().regex(/^[a-f0-9]{24}$/i);
+
+/** Aktif haneyi değiştirir: önce üyelik doğrulanır, sonra cookie yazılır. */
+export async function switchHouseholdAction(
+  householdId: unknown,
+): Promise<ActionResult<{ name: string }>> {
+  const user = await getCurrentUser();
+  const id = idSchema.safeParse(householdId);
+  if (!user || !id.success) return fail(tr.common.unauthorized);
+  const membership = await resolveMembership(user.id, id.data, "viewer");
+  if (!membership) return fail(tr.common.unauthorized);
+  await writeActiveHouseholdId(id.data);
+  revalidatePath("/", "layout");
+  return ok({ name: membership.name });
+}
+
+/** Owner: hane adı ve ayarları (aktif hane). */
+export async function updateHouseholdSettingsAction(input: unknown): Promise<ActionResult> {
+  const ctx = await getHouseholdActionContext("owner");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const parsed = householdSettingsSchema.safeParse(input);
+  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields);
+  const result = await updateHouseholdSettings(ctx.user.id, ctx.household.id, parsed.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}
+
+/** Owner: aktif hanedeki üyenin rolü. */
+export async function setMemberRoleAction(userId: unknown, role: unknown): Promise<ActionResult> {
+  const ctx = await getHouseholdActionContext("owner");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const uid = idSchema.safeParse(userId);
+  const r = householdRoleSchema.safeParse(role);
+  if (!uid.success || !r.success) return fail(tr.common.genericError);
+  const result = await setMemberRole(ctx.user.id, ctx.household.id, uid.data, r.data);
+  if (result.ok) revalidatePath("/ayarlar");
+  return result;
+}
+
+/** Owner: üyeyi aktif haneden çıkarır. */
+export async function removeMemberAction(userId: unknown): Promise<ActionResult> {
+  const ctx = await getHouseholdActionContext("owner");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const uid = idSchema.safeParse(userId);
+  if (!uid.success) return fail(tr.common.genericError);
+  const result = await removeMember(ctx.user.id, ctx.household.id, uid.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}

src/features/households/components/household-settings-form.tsx

@@ -0,0 +1,228 @@
+"use client";
+
+import { zodResolver } from "@hookform/resolvers/zod";
+import { Loader2 } from "lucide-react";
+import { Controller, useForm } from "react-hook-form";
+import { toast } from "sonner";
+import { z } from "zod";
+import { Button } from "@/components/ui/button";
+import { Checkbox } from "@/components/ui/checkbox";
+import {
+  Field,
+  FieldDescription,
+  FieldError,
+  FieldGroup,
+  FieldLabel,
+  FieldSet,
+} from "@/components/ui/field";
+import { Input } from "@/components/ui/input";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { tr } from "@/i18n/tr";
+import { householdSettingsSchema, type HouseholdSettings } from "@/shared/schemas/household";
+import { updateHouseholdSettingsAction } from "../actions";
+
+const t = tr.settings.fields;
+
+/** Form şeması: eşik TL (tam sayı) olarak girilir, kuruşa sunucuya giderken çevrilir. */
+const formSchema = householdSettingsSchema
+  .omit({ extraStoreSavingThresholdMinor: true, budgetMonthStartDay: true })
+  .extend({
+    budgetMonthStartDay: z.number().int().min(1).max(28),
+    extraStoreSavingThresholdTl: z
+      .number({ error: tr.validation.wholeNumber })
+      .int(tr.validation.wholeNumber)
+      .min(0)
+      .max(100_000),
+  });
+type FormValues = z.infer<typeof formSchema>;
+
+const DAYS = Array.from({ length: 28 }, (_, i) => i + 1);
+
+export function HouseholdSettingsForm({
+  settings,
+  canEdit,
+}: {
+  settings: HouseholdSettings;
+  canEdit: boolean;
+}) {
+  const form = useForm<FormValues>({
+    resolver: zodResolver(formSchema),
+    defaultValues: {
+      name: settings.name,
+      budgetMonthStartDay: settings.budgetMonthStartDay,
+      installmentBudgetMode: settings.installmentBudgetMode,
+      dailyPlanMode: settings.dailyPlanMode,
+      includePrivateAccountsInTotals: settings.includePrivateAccountsInTotals,
+      extraStoreSavingThresholdTl: Math.round(settings.extraStoreSavingThresholdMinor / 100),
+    },
+  });
+
+  async function onSubmit({ extraStoreSavingThresholdTl, ...rest }: FormValues) {
+    const result = await updateHouseholdSettingsAction({
+      ...rest,
+      extraStoreSavingThresholdMinor: extraStoreSavingThresholdTl * 100,
+    });
+    if (result.ok) {
+      toast.success(tr.settings.saved);
+      form.reset({ ...rest, extraStoreSavingThresholdTl });
+    } else {
+      toast.error(result.error);
+    }
+  }
+
+  const submitting = form.formState.isSubmitting;
+
+  return (
+    <form onSubmit={form.handleSubmit(onSubmit)} noValidate>
+      {/* Sahip olmayanlar için tüm alanlar salt okunur. */}
+      <FieldSet disabled={!canEdit || submitting}>
+        <FieldGroup>
+          <Controller
+            name="name"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="hh-name">{t.name}</FieldLabel>
+                <Input {...field} id="hh-name" aria-invalid={fieldState.invalid} />
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="budgetMonthStartDay"
+            control={form.control}
+            render={({ field }) => (
+              <Field>
+                <FieldLabel htmlFor="hh-start-day">{t.budgetMonthStartDay}</FieldLabel>
+                <Select
+                  value={String(field.value)}
+                  onValueChange={(v) => field.onChange(Number(v))}
+                  disabled={!canEdit}
+                >
+                  <SelectTrigger
+                    id="hh-start-day"
+                    className="w-28"
+                    aria-describedby="hh-start-day-hint"
+                  >
+                    <SelectValue>{field.value}</SelectValue>
+                  </SelectTrigger>
+                  <SelectContent className="max-h-64">
+                    {DAYS.map((d) => (
+                      <SelectItem key={d} value={String(d)}>
+                        {d}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FieldDescription id="hh-start-day-hint">
+                  {t.budgetMonthStartDayHint}
+                </FieldDescription>
+              </Field>
+            )}
+          />
+          <Controller
+            name="installmentBudgetMode"
+            control={form.control}
+            render={({ field }) => (
+              <Field>
+                <FieldLabel htmlFor="hh-installment">{t.installmentBudgetMode}</FieldLabel>
+                <Select value={field.value} onValueChange={field.onChange} disabled={!canEdit}>
+                  <SelectTrigger id="hh-installment" className="w-full sm:w-80">
+                    <SelectValue>{t.installmentModes[field.value]}</SelectValue>
+                  </SelectTrigger>
+                  <SelectContent>
+                    {(["per_installment", "purchase_month"] as const).map((m) => (
+                      <SelectItem key={m} value={m}>
+                        {t.installmentModes[m]}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+              </Field>
+            )}
+          />
+          <Controller
+            name="dailyPlanMode"
+            control={form.control}
+            render={({ field }) => (
+              <Field>
+                <FieldLabel htmlFor="hh-daily">{t.dailyPlanMode}</FieldLabel>
+                <Select value={field.value} onValueChange={field.onChange} disabled={!canEdit}>
+                  <SelectTrigger id="hh-daily" className="w-full sm:w-80">
+                    <SelectValue>{t.dailyPlanModes[field.value]}</SelectValue>
+                  </SelectTrigger>
+                  <SelectContent>
+                    {(["even", "previous_month_pattern"] as const).map((m) => (
+                      <SelectItem key={m} value={m}>
+                        {t.dailyPlanModes[m]}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+              </Field>
+            )}
+          />
+          <Controller
+            name="extraStoreSavingThresholdTl"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="hh-threshold">{t.extraStoreSavingThreshold}</FieldLabel>
+                <Input
+                  id="hh-threshold"
+                  type="number"
+                  inputMode="numeric"
+                  min={0}
+                  step={1}
+                  className="w-36 tabular-nums"
+                  name={field.name}
+                  ref={field.ref}
+                  onBlur={field.onBlur}
+                  value={Number.isNaN(field.value) ? "" : field.value}
+                  onChange={(e) => field.onChange(e.target.valueAsNumber)}
+                  aria-invalid={fieldState.invalid}
+                  aria-describedby="hh-threshold-hint"
+                />
+                <FieldDescription id="hh-threshold-hint">
+                  {t.extraStoreSavingThresholdHint}
+                </FieldDescription>
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="includePrivateAccountsInTotals"
+            control={form.control}
+            render={({ field }) => (
+              <Field orientation="horizontal">
+                <Checkbox
+                  id="hh-private"
+                  checked={field.value}
+                  onCheckedChange={(v) => field.onChange(v === true)}
+                  disabled={!canEdit}
+                />
+                <FieldLabel htmlFor="hh-private" className="font-normal">
+                  {t.includePrivateAccountsInTotals}
+                </FieldLabel>
+              </Field>
+            )}
+          />
+          {canEdit ? (
+            <div>
+              <Button type="submit" disabled={submitting || !form.formState.isDirty}>
+                {submitting ? <Loader2 className="animate-spin" /> : null}
+                {tr.common.save}
+              </Button>
+            </div>
+          ) : null}
+        </FieldGroup>
+      </FieldSet>
+    </form>
+  );
+}

src/features/households/components/members-list.tsx

@@ -0,0 +1,169 @@
+"use client";
+
+import { UserMinus } from "lucide-react";
+import { useState, useTransition } from "react";
+import { toast } from "sonner";
+import {
+  AlertDialog,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from "@/components/ui/alert-dialog";
+import { Avatar, AvatarFallback } from "@/components/ui/avatar";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { initials } from "@/components/layout/user-menu";
+import { tr } from "@/i18n/tr";
+import type { ActionResult } from "@/lib/action-result";
+import { HOUSEHOLD_ROLES, type HouseholdRole } from "../types";
+
+export type MemberRow = {
+  userId: string;
+  name: string;
+  username: string;
+  role: HouseholdRole;
+  banned: boolean;
+};
+
+type Props = {
+  members: MemberRow[];
+  householdName: string;
+  currentUserId: string;
+  canManage: boolean;
+  onSetRole: (userId: string, role: HouseholdRole) => Promise<ActionResult>;
+  onRemove: (userId: string) => Promise<ActionResult>;
+};
+
+/** Hane üyeleri: owner (veya admin) rol değiştirir / haneden çıkarır. Kurallar sunucuda. */
+export function MembersList({
+  members,
+  householdName,
+  currentUserId,
+  canManage,
+  onSetRole,
+  onRemove,
+}: Props) {
+  const [pending, startTransition] = useTransition();
+  const [removing, setRemoving] = useState<MemberRow | null>(null);
+  const t = tr.settings;
+
+  function changeRole(member: MemberRow, role: HouseholdRole) {
+    startTransition(async () => {
+      const result = await onSetRole(member.userId, role);
+      if (result.ok) toast.success(t.roleChanged(member.name));
+      else toast.error(result.error);
+    });
+  }
+
+  function confirmRemove() {
+    const member = removing;
+    if (!member) return;
+    startTransition(async () => {
+      const result = await onRemove(member.userId);
+      if (result.ok) {
+        toast.success(t.memberRemoved(member.name));
+        setRemoving(null);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  }
+
+  return (
+    <>
+      <ul className="divide-y rounded-xl border" aria-busy={pending}>
+        {members.map((m) => (
+          <li key={m.userId} className="flex flex-wrap items-center gap-3 p-3">
+            <Avatar>
+              <AvatarFallback className="bg-primary/10 text-xs font-medium text-primary">
+                {initials(m.name)}
+              </AvatarFallback>
+            </Avatar>
+            <div className="min-w-0 flex-1">
+              <p className="truncate font-medium">
+                {m.name}
+                {m.userId === currentUserId ? (
+                  <span className="ml-1.5 text-xs font-normal text-muted-foreground">
+                    ({tr.adminUsers.you})
+                  </span>
+                ) : null}
+              </p>
+              <p className="truncate text-xs text-muted-foreground">@{m.username}</p>
+            </div>
+            {m.banned ? <Badge variant="destructive">{t.banned}</Badge> : null}
+            {canManage ? (
+              <div className="flex items-center gap-1">
+                <Select
+                  value={m.role}
+                  onValueChange={(v) => changeRole(m, v as HouseholdRole)}
+                  disabled={pending}
+                >
+                  <SelectTrigger
+                    size="sm"
+                    className="w-32"
+                    aria-label={`${m.name} — ${t.changeRole}`}
+                  >
+                    <SelectValue>{tr.household.roles[m.role]}</SelectValue>
+                  </SelectTrigger>
+                  <SelectContent align="end">
+                    {HOUSEHOLD_ROLES.map((r) => (
+                      <SelectItem key={r} value={r}>
+                        <span className="flex flex-col">
+                          <span>{tr.household.roles[r]}</span>
+                          <span className="text-xs text-muted-foreground">
+                            {tr.household.roleHints[r]}
+                          </span>
+                        </span>
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <Button
+                  variant="ghost"
+                  size="icon-sm"
+                  onClick={() => setRemoving(m)}
+                  disabled={pending}
+                  aria-label={`${m.name} — ${t.removeMember}`}
+                  title={t.removeMember}
+                >
+                  <UserMinus />
+                </Button>
+              </div>
+            ) : (
+              <Badge variant={m.role === "owner" ? "default" : "secondary"}>
+                {tr.household.roles[m.role]}
+              </Badge>
+            )}
+          </li>
+        ))}
+      </ul>
+
+      <AlertDialog open={Boolean(removing)} onOpenChange={(open) => !open && setRemoving(null)}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>{t.removeTitle}</AlertDialogTitle>
+            <AlertDialogDescription>
+              {removing ? t.removeDescription(removing.name, householdName) : null}
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel disabled={pending}>{tr.common.cancel}</AlertDialogCancel>
+            <Button variant="destructive" onClick={confirmRemove} disabled={pending}>
+              {t.removeConfirm}
+            </Button>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
+    </>
+  );
+}

src/features/households/components/settings-members.tsx

@@ -0,0 +1,21 @@
+"use client";
+
+import { removeMemberAction, setMemberRoleAction } from "../actions";
+import type { HouseholdRole } from "../types";
+import { MembersList, type MemberRow } from "./members-list";
+
+/** /ayarlar: aktif hanenin üyeleri (owner action'larına bağlı). */
+export function SettingsMembers(props: {
+  members: MemberRow[];
+  householdName: string;
+  currentUserId: string;
+  canManage: boolean;
+}) {
+  return (
+    <MembersList
+      {...props}
+      onSetRole={(userId, role: HouseholdRole) => setMemberRoleAction(userId, role)}
+      onRemove={(userId) => removeMemberAction(userId)}
+    />
+  );
+}

src/features/households/mock.ts

@@ -1,7 +0,0 @@
-import type { HouseholdSummary } from "./types";
-
-/** FAZ 2 GEÇİCİ: Faz 5'te kullanıcının üye olduğu hanelerle değiştirilecek. */
-export const MOCK_HOUSEHOLDS: HouseholdSummary[] = [
-  { id: "h_cakir", name: "Çakır Ailesi", role: "owner" },
-  { id: "h_anne", name: "Annemler", role: "viewer" },
-];

src/features/households/roles.test.ts

@@ -0,0 +1,54 @@
+import { describe, expect, it } from "vitest";
+import { checkMemberChange, hasHouseholdRole, pickActiveHousehold } from "./roles";
+
+describe("hasHouseholdRole", () => {
+  it("viewer < member < owner sırasını uygular", () => {
+    expect(hasHouseholdRole("owner", "member")).toBe(true);
+    expect(hasHouseholdRole("member", "member")).toBe(true);
+    expect(hasHouseholdRole("viewer", "member")).toBe(false);
+    expect(hasHouseholdRole("member", "owner")).toBe(false);
+    expect(hasHouseholdRole("viewer", "viewer")).toBe(true);
+  });
+});
+
+describe("checkMemberChange", () => {
+  it("son sahip düşürülemez veya çıkarılamaz", () => {
+    const ctx = { targetRole: "owner" as const, ownerCount: 1 };
+    expect(checkMemberChange({ type: "remove" }, ctx)).toBe("lastOwner");
+    expect(checkMemberChange({ type: "setRole", role: "member" }, ctx)).toBe("lastOwner");
+    expect(checkMemberChange({ type: "setRole", role: "owner" }, ctx)).toBeNull();
+  });
+
+  it("birden çok sahip varken biri düşürülebilir; sahip olmayanlar serbest", () => {
+    expect(
+      checkMemberChange({ type: "remove" }, { targetRole: "owner", ownerCount: 2 }),
+    ).toBeNull();
+    expect(
+      checkMemberChange({ type: "remove" }, { targetRole: "viewer", ownerCount: 1 }),
+    ).toBeNull();
+    expect(
+      checkMemberChange(
+        { type: "setRole", role: "owner" },
+        { targetRole: "member", ownerCount: 1 },
+      ),
+    ).toBeNull();
+  });
+});
+
+describe("pickActiveHousehold", () => {
+  const list = [
+    { id: "a", role: "viewer" as const },
+    { id: "b", role: "owner" as const },
+    { id: "c", role: "owner" as const },
+  ];
+  it("üyesi olunan tercih edilen haneyi seçer", () => {
+    expect(pickActiveHousehold(list, "a")?.id).toBe("a");
+  });
+  it("tercih yoksa veya uydurmaysa en yüksek rolün olduğu ilk haneye düşer", () => {
+    expect(pickActiveHousehold(list, "x")?.id).toBe("b");
+    expect(pickActiveHousehold(list, undefined)?.id).toBe("b");
+  });
+  it("hiç üyelik yoksa null", () => {
+    expect(pickActiveHousehold([], "a")).toBeNull();
+  });
+});

src/features/households/roles.ts

@@ -0,0 +1,43 @@
+import type { HouseholdRole } from "./types";
+
+/** Hane içi yetki sırası: viewer < member < owner. */
+const RANK: Record<HouseholdRole, number> = { viewer: 0, member: 1, owner: 2 };
+
+/** `role`, en az `min` yetkisine sahip mi? */
+export function hasHouseholdRole(role: HouseholdRole, min: HouseholdRole): boolean {
+  return RANK[role] >= RANK[min];
+}
+
+export type MemberChange = { type: "setRole"; role: HouseholdRole } | { type: "remove" };
+
+export type MemberChangeViolation = "lastOwner";
+
+/**
+ * Üyelik değişikliği kuralı: hanenin son sahibi (owner) düşürülemez veya çıkarılamaz.
+ * Böylece her hanenin ayarlarını ve üyelerini yönetebilecek en az bir kişi kalır.
+ */
+export function checkMemberChange(
+  change: MemberChange,
+  ctx: { targetRole: HouseholdRole; ownerCount: number },
+): MemberChangeViolation | null {
+  const removesOwner =
+    ctx.targetRole === "owner" &&
+    (change.type === "remove" || (change.type === "setRole" && change.role !== "owner"));
+  return removesOwner && ctx.ownerCount <= 1 ? "lastOwner" : null;
+}
+
+/**
+ * Aktif hane seçimi: tercih edilen (cookie) hane kullanıcının üyelikleri arasındaysa o;
+ * değilse en yüksek rolün olduğu hane (eşitlikte listedeki ilk). Uydurma veya artık üye
+ * olunmayan bir hane kimliği asla seçilmez.
+ */
+export function pickActiveHousehold<T extends { id: string; role: HouseholdRole }>(
+  memberships: T[],
+  preferredId: string | undefined,
+): T | null {
+  const preferred = memberships.find((m) => m.id === preferredId);
+  if (preferred) return preferred;
+  let best: T | null = null;
+  for (const m of memberships) if (!best || RANK[m.role] > RANK[best.role]) best = m;
+  return best;
+}

src/features/households/service.int.test.ts

@@ -0,0 +1,207 @@
+import mongoose, { Types } from "mongoose";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { getDb, getMongoClient } from "@/lib/db/mongo";
+import { AuditLogModel } from "@/models/audit-log";
+import { HouseholdModel } from "@/models/household";
+import { HouseholdMemberModel } from "@/models/household-member";
+import { runSeed } from "../../../scripts/seed/run";
+import {
+  adminCreateHousehold,
+  adminSetMemberRole,
+  getHouseholdDetail,
+  listMemberships,
+  removeAllMembershipsOfUser,
+  removeMember,
+  resolveMembership,
+  setMemberRole,
+  updateHouseholdSettings,
+} from "./service";
+
+/**
+ * VERİ İZOLASYONU (Bölüm 5): başka hanenin verisine erişim imkânsız olmalı.
+ * Seed verisi: Çakır Ailesi (admin+ayse owner, emre member, zeynep viewer, ozan member),
+ * Annemler (fatma owner, mehmet member, ayse viewer), burak = hanesi olmayan admin.
+ */
+
+const ids = new Map<string, string>();
+let cakir = "";
+let annemler = "";
+
+const settings = {
+  name: "Çakır Ailesi",
+  budgetMonthStartDay: 15,
+  installmentBudgetMode: "purchase_month" as const,
+  dailyPlanMode: "even" as const,
+  includePrivateAccountsInTotals: false,
+  extraStoreSavingThresholdMinor: 25_000,
+};
+
+beforeAll(async () => {
+  expect(getDb().databaseName).toBe("butcem_test");
+  await getDb().dropDatabase();
+  await runSeed({ log: () => {} });
+  for (const u of await getDb().collection("user").find().toArray())
+    ids.set(String(u.username), String(u._id));
+  cakir = String((await HouseholdModel.findOne({ name: "Çakır Ailesi" }))!._id);
+  annemler = String((await HouseholdModel.findOne({ name: "Annemler" }))!._id);
+});
+
+afterAll(async () => {
+  await getDb().dropDatabase();
+  await mongoose.disconnect();
+  await getMongoClient().close();
+});
+
+const id = (username: string) => ids.get(username)!;
+
+describe("üyelik çözümleme (izolasyon çekirdeği)", () => {
+  it("üye olmayan kullanıcı başka hanenin üyeliğini çözemez", async () => {
+    expect(await resolveMembership(id("fatma"), cakir)).toBeNull();
+    expect(await resolveMembership(id("emre"), annemler)).toBeNull();
+  });
+
+  it("rol yetmezse null döner", async () => {
+    expect((await resolveMembership(id("ayse"), annemler, "viewer"))?.role).toBe("viewer");
+    expect(await resolveMembership(id("ayse"), annemler, "member")).toBeNull();
+    expect(await resolveMembership(id("zeynep"), cakir, "member")).toBeNull();
+    expect((await resolveMembership(id("emre"), cakir, "member"))?.role).toBe("member");
+  });
+
+  it("hanesi olmayan admin hiçbir haneyi göremez (admin ayrıcalığı yok)", async () => {
+    expect(await listMemberships(id("burak"))).toEqual([]);
+    expect(await resolveMembership(id("burak"), cakir)).toBeNull();
+    expect(await getHouseholdDetail(id("burak"), cakir)).toBeNull();
+  });
+
+  it("geçersiz ve uydurma kimlikler reddedilir", async () => {
+    const forged = new Types.ObjectId().toHexString();
+    expect(await resolveMembership(id("ayse"), forged)).toBeNull();
+    expect(await resolveMembership(id("ayse"), "not-an-id")).toBeNull();
+    expect(await resolveMembership(id("ayse"), { $ne: null } as unknown as string)).toBeNull();
+    expect(await resolveMembership("", cakir)).toBeNull();
+  });
+
+  it("kullanıcı yalnızca kendi hanelerini listeler", async () => {
+    expect((await listMemberships(id("ayse"))).map((m) => [m.name, m.role])).toEqual([
+      ["Annemler", "viewer"],
+      ["Çakır Ailesi", "owner"],
+    ]);
+    expect((await listMemberships(id("fatma"))).map((m) => m.name)).toEqual(["Annemler"]);
+  });
+});
+
+describe("hane ayrıntısı ve ayarlar", () => {
+  it("başka hanenin ayrıntısı okunamaz", async () => {
+    expect(await getHouseholdDetail(id("fatma"), cakir)).toBeNull();
+    const own = await getHouseholdDetail(id("emre"), cakir);
+    expect(own?.members.map((m) => m.username).sort()).toEqual([
+      "admin",
+      "ayse",
+      "emre",
+      "ozan",
+      "zeynep",
+    ]);
+  });
+
+  it("başka hanenin sahibi, üye ve izleyici ayarları değiştiremez", async () => {
+    for (const u of ["fatma", "emre", "zeynep", "burak"]) {
+      const res = await updateHouseholdSettings(id(u), cakir, settings);
+      expect(res.ok, u).toBe(false);
+    }
+    const h = await HouseholdModel.findById(cakir).lean();
+    expect(h?.settings?.budgetMonthStartDay).toBe(1);
+  });
+
+  it("sahip ayarları değiştirir ve denetim kaydı yazılır", async () => {
+    const res = await updateHouseholdSettings(id("ayse"), cakir, settings);
+    expect(res.ok).toBe(true);
+    const h = await HouseholdModel.findById(cakir).lean();
+    expect(h?.settings?.budgetMonthStartDay).toBe(15);
+    const audit = await AuditLogModel.findOne({
+      action: "household.settings.update",
+      householdId: cakir,
+    }).lean();
+    expect(audit?.actorId.toString()).toBe(id("ayse"));
+    expect((audit?.diff as Record<string, unknown>).budgetMonthStartDay).toEqual({
+      from: 1,
+      to: 15,
+    });
+  });
+});
+
+describe("üyelik değişiklikleri", () => {
+  it("üye ve izleyici rol değiştiremez, üye çıkaramaz", async () => {
+    expect((await setMemberRole(id("emre"), cakir, id("zeynep"), "owner")).ok).toBe(false);
+    expect((await removeMember(id("zeynep"), cakir, id("emre"))).ok).toBe(false);
+  });
+
+  it("bir hanenin sahibi başka hanedeki üyeliği etkileyemez", async () => {
+    // ayse Çakır'ın sahibi; fatma Çakır üyesi değil → işlem bulunamaz, Annemler'deki rolü değişmez.
+    expect((await setMemberRole(id("ayse"), cakir, id("fatma"), "viewer")).ok).toBe(false);
+    expect((await removeMember(id("ayse"), cakir, id("mehmet"))).ok).toBe(false);
+    // fatma Annemler'in sahibi; Çakır üzerinde yetkisi yok.
+    expect((await setMemberRole(id("fatma"), cakir, id("emre"), "viewer")).ok).toBe(false);
+    const fatma = await HouseholdMemberModel.findOne({
+      householdId: annemler,
+      userId: id("fatma"),
+    }).lean();
+    const mehmet = await HouseholdMemberModel.findOne({
+      householdId: annemler,
+      userId: id("mehmet"),
+    }).lean();
+    const emre = await HouseholdMemberModel.findOne({
+      householdId: cakir,
+      userId: id("emre"),
+    }).lean();
+    expect([fatma?.role, mehmet?.role, emre?.role]).toEqual(["owner", "member", "member"]);
+  });
+
+  it("son sahip düşürülemez; birden çok sahip varken düşürülebilir", async () => {
+    expect((await adminSetMemberRole(id("admin"), annemler, id("fatma"), "member")).ok).toBe(false);
+    expect((await setMemberRole(id("fatma"), annemler, id("fatma"), "member")).ok).toBe(false);
+    // Çakır'da iki sahip var (admin + ayse).
+    expect((await setMemberRole(id("ayse"), cakir, id("admin"), "member")).ok).toBe(true);
+    // Artık ayse son sahip.
+    expect((await setMemberRole(id("ayse"), cakir, id("ayse"), "member")).ok).toBe(false);
+    expect((await setMemberRole(id("ayse"), cakir, id("admin"), "owner")).ok).toBe(true);
+    expect(
+      await AuditLogModel.countDocuments({ action: "household.member.role", householdId: cakir }),
+    ).toBe(2);
+  });
+
+  it("sahip üyeyi haneden çıkarır; kullanıcı artık haneyi göremez", async () => {
+    expect((await removeMember(id("ayse"), cakir, id("ozan"))).ok).toBe(true);
+    expect(await resolveMembership(id("ozan"), cakir)).toBeNull();
+    expect(await listMemberships(id("ozan"))).toEqual([]);
+  });
+});
+
+describe("admin işlemleri", () => {
+  it("hane + ilk sahip + denetim kaydı tek transaction'da oluşur", async () => {
+    const res = await adminCreateHousehold(id("admin"), {
+      name: "Yazlık",
+      ownerUserId: id("burak"),
+    });
+    expect(res.ok).toBe(true);
+    const hid = res.ok ? res.data.id : "";
+    expect((await resolveMembership(id("burak"), hid, "owner"))?.name).toBe("Yazlık");
+    expect(
+      await AuditLogModel.countDocuments({ action: "household.create", householdId: hid }),
+    ).toBe(1);
+  });
+
+  it("var olmayan kullanıcıyla hane oluşturulmaz", async () => {
+    const before = await HouseholdModel.countDocuments();
+    const res = await adminCreateHousehold(id("admin"), {
+      name: "Hayalet",
+      ownerUserId: new Types.ObjectId().toHexString(),
+    });
+    expect(res.ok).toBe(false);
+    expect(await HouseholdModel.countDocuments()).toBe(before);
+  });
+
+  it("kullanıcı silinince tüm üyelikleri temizlenir", async () => {
+    expect(await removeAllMembershipsOfUser(id("mehmet"))).toBe(1);
+    expect(await listMemberships(id("mehmet"))).toEqual([]);
+  });
+});

src/features/households/service.ts

@@ -0,0 +1,399 @@
+import "server-only";
+import { Types } from "mongoose";
+import { tr } from "@/i18n/tr";
+import { fail, ok, type ActionResult } from "@/lib/action-result";
+import { diffFields, writeAudit } from "@/lib/audit";
+import { getDb } from "@/lib/db/mongo";
+import { connectMongoose } from "@/lib/db/mongoose";
+import { toObjectId } from "@/lib/object-id";
+import { HouseholdModel } from "@/models/household";
+import { HouseholdMemberModel } from "@/models/household-member";
+import type { HouseholdSettings } from "@/shared/schemas/household";
+import { compareTr } from "@/shared/search";
+import { checkMemberChange, hasHouseholdRole, type MemberChange } from "./roles";
+import type { HouseholdRole, HouseholdSummary } from "./types";
+
+/**
+ * Hane servisi — framework'ten bağımsız (web Server Action'ları ve ileride /api/v1 aynı
+ * fonksiyonları çağırır). Hane kapsamlı her fonksiyon üyeliği KENDİSİ de doğrular:
+ * çağıran taraf DAL kontrolünü atlasa bile başka hanenin verisine erişilemez.
+ */
+
+const t = tr.households;
+
+export type Membership = { householdId: Types.ObjectId; role: HouseholdRole; name: string };
+
+export type HouseholdMemberView = {
+  userId: string;
+  name: string;
+  username: string;
+  role: HouseholdRole;
+  banned: boolean;
+};
+
+export type HouseholdDetail = {
+  id: string;
+  name: string;
+  settings: HouseholdSettings;
+  members: HouseholdMemberView[];
+};
+
+/** Kullanıcının üye olduğu (arşivlenmemiş) haneler, ada göre sıralı. */
+export async function listMemberships(userId: string): Promise<HouseholdSummary[]> {
+  const uid = toObjectId(userId);
+  if (!uid) return [];
+  await connectMongoose();
+  const memberships = await HouseholdMemberModel.find({ userId: uid }).lean();
+  if (!memberships.length) return [];
+  const households = await HouseholdModel.find({
+    _id: { $in: memberships.map((m) => m.householdId) },
+    archivedAt: null,
+  })
+    .select({ name: 1 })
+    .lean();
+  const roleOf = new Map(memberships.map((m) => [String(m.householdId), m.role]));
+  return households
+    .map((h) => ({ id: String(h._id), name: h.name, role: roleOf.get(String(h._id))! }))
+    .sort((a, b) => compareTr(a.name, b.name));
+}
+
+/**
+ * VERİ İZOLASYONUNUN ÇEKİRDEĞİ: kullanıcı bu hanenin en az `minRole` yetkili üyesi mi?
+ * Değilse null. Geçersiz/uydurma kimlikler de null döner.
+ */
+export async function resolveMembership(
+  userId: string,
+  householdId: string,
+  minRole: HouseholdRole = "viewer",
+): Promise<Membership | null> {
+  const uid = toObjectId(userId);
+  const hid = toObjectId(householdId);
+  if (!uid || !hid) return null;
+  await connectMongoose();
+  const member = await HouseholdMemberModel.findOne({ userId: uid, householdId: hid }).lean();
+  if (!member || !hasHouseholdRole(member.role, minRole)) return null;
+  const household = await HouseholdModel.findOne({ _id: hid, archivedAt: null })
+    .select({ name: 1 })
+    .lean();
+  if (!household) return null;
+  return { householdId: hid, role: member.role, name: household.name };
+}
+
+async function memberViews(householdId: Types.ObjectId): Promise<HouseholdMemberView[]> {
+  const members = await HouseholdMemberModel.find({ householdId }).lean();
+  const users = await getDb()
+    .collection("user")
+    .find(
+      { _id: { $in: members.map((m) => m.userId) } },
+      { projection: { name: 1, username: 1, banned: 1 } },
+    )
+    .toArray();
+  const byId = new Map(users.map((u) => [String(u._id), u]));
+  return members
+    .map((m) => {
+      const u = byId.get(String(m.userId));
+      return {
+        userId: String(m.userId),
+        name: (u?.name as string | undefined) ?? "—",
+        username: (u?.username as string | undefined) ?? "",
+        role: m.role,
+        banned: Boolean(u?.banned),
+      };
+    })
+    .sort((a, b) => compareTr(a.name, b.name));
+}
+
+function toSettings(h: {
+  name: string;
+  settings?: Partial<HouseholdSettings> | null;
+}): HouseholdSettings {
+  const s = h.settings ?? {};
+  return {
+    name: h.name,
+    budgetMonthStartDay: s.budgetMonthStartDay ?? 1,
+    installmentBudgetMode: s.installmentBudgetMode ?? "per_installment",
+    dailyPlanMode: s.dailyPlanMode ?? "even",
+    includePrivateAccountsInTotals: s.includePrivateAccountsInTotals ?? true,
+    extraStoreSavingThresholdMinor: s.extraStoreSavingThresholdMinor ?? 10_000,
+  };
+}
+
+/** Üye için hane ayrıntısı (ayarlar + üyeler). Üye değilse null. */
+export async function getHouseholdDetail(
+  userId: string,
+  householdId: string,
+): Promise<HouseholdDetail | null> {
+  const membership = await resolveMembership(userId, householdId, "viewer");
+  if (!membership) return null;
+  const household = await HouseholdModel.findById(membership.householdId).lean();
+  if (!household) return null;
+  return {
+    id: String(household._id),
+    name: household.name,
+    settings: toSettings(household),
+    members: await memberViews(membership.householdId),
+  };
+}
+
+/** Owner: hane adı ve ayarları. */
+export async function updateHouseholdSettings(
+  actorId: string,
+  householdId: string,
+  input: HouseholdSettings,
+): Promise<ActionResult> {
+  const membership = await resolveMembership(actorId, householdId, "owner");
+  if (!membership) return fail(tr.common.unauthorized);
+  const before = await HouseholdModel.findById(membership.householdId).lean();
+  if (!before) return fail(tr.common.notFound);
+
+  const { name, ...settings } = input;
+  const actor = new Types.ObjectId(actorId);
+  await HouseholdModel.updateOne(
+    { _id: membership.householdId },
+    { $set: { name, settings, updatedBy: actor } },
+  );
+  await writeAudit({
+    action: "household.settings.update",
+    actorId: actor,
+    householdId: membership.householdId,
+    targetType: "household",
+    targetId: String(membership.householdId),
+    diff: diffFields(toSettings(before), input),
+  });
+  return ok(undefined);
+}
+
+/** Ortak üyelik değişikliği (owner yolu ve admin yolu aynı kuralı uygular). */
+async function applyMemberChange(
+  actor: Types.ObjectId,
+  householdId: Types.ObjectId,
+  targetUserId: string,
+  change: MemberChange,
+): Promise<ActionResult> {
+  const target = toObjectId(targetUserId);
+  if (!target) return fail(tr.common.notFound);
+  const member = await HouseholdMemberModel.findOne({ householdId, userId: target }).lean();
+  if (!member) return fail(tr.common.notFound);
+  if (change.type === "setRole" && change.role === member.role) return ok(undefined);
+
+  const ownerCount = await HouseholdMemberModel.countDocuments({ householdId, role: "owner" });
+  if (checkMemberChange(change, { targetRole: member.role, ownerCount })) return fail(t.lastOwner);
+
+  if (change.type === "remove") {
+    await HouseholdMemberModel.deleteOne({ _id: member._id });
+  } else {
+    await HouseholdMemberModel.updateOne(
+      { _id: member._id },
+      { $set: { role: change.role, updatedBy: actor } },
+    );
+  }
+  await writeAudit({
+    action: change.type === "remove" ? "household.member.remove" : "household.member.role",
+    actorId: actor,
+    householdId,
+    targetType: "user",
+    targetId: targetUserId,
+    diff:
+      change.type === "remove"
+        ? { role: { from: member.role, to: null } }
+        : { role: { from: member.role, to: change.role } },
+  });
+  return ok(undefined);
+}
+
+/** Owner: üyenin hane içi rolünü değiştirir. */
+export async function setMemberRole(
+  actorId: string,
+  householdId: string,
+  targetUserId: string,
+  role: HouseholdRole,
+): Promise<ActionResult> {
+  const membership = await resolveMembership(actorId, householdId, "owner");
+  if (!membership) return fail(tr.common.unauthorized);
+  return applyMemberChange(new Types.ObjectId(actorId), membership.householdId, targetUserId, {
+    type: "setRole",
+    role,
+  });
+}
+
+/** Owner: üyeyi haneden çıkarır. */
+export async function removeMember(
+  actorId: string,
+  householdId: string,
+  targetUserId: string,
+): Promise<ActionResult> {
+  const membership = await resolveMembership(actorId, householdId, "owner");
+  if (!membership) return fail(tr.common.unauthorized);
+  return applyMemberChange(new Types.ObjectId(actorId), membership.householdId, targetUserId, {
+    type: "remove",
+  });
+}
+
+// --- Sistem admini (yönetim) — çağıran Server Action admin rolünü doğrular. ---
+// Admin haneleri ve üyelikleri yönetir; hanenin finansal verisini GÖRMEZ (Faz 0 kararı).
+
+export type AdminHouseholdRow = {
+  id: string;
+  name: string;
+  memberCount: number;
+  owners: string[];
+  members: HouseholdMemberView[];
+  createdAt: string;
+};
+
+export async function adminListHouseholds(): Promise<AdminHouseholdRow[]> {
+  await connectMongoose();
+  const households = await HouseholdModel.find({ archivedAt: null }).sort({ name: 1 }).lean();
+  const rows = await Promise.all(
+    households.map(async (h) => {
+      const members = await memberViews(h._id);
+      return {
+        id: String(h._id),
+        name: h.name,
+        memberCount: members.length,
+        owners: members.filter((m) => m.role === "owner").map((m) => m.name),
+        members,
+        createdAt: new Date(h.createdAt).toISOString(),
+      };
+    }),
+  );
+  return rows.sort((a, b) => compareTr(a.name, b.name));
+}
+
+export type UserOption = { id: string; name: string; username: string; banned: boolean };
+
+export async function adminListUserOptions(): Promise<UserOption[]> {
+  const users = await getDb()
+    .collection("user")
+    .find({}, { projection: { name: 1, username: 1, banned: 1 } })
+    .toArray();
+  return users
+    .map((u) => ({
+      id: String(u._id),
+      name: String(u.name ?? ""),
+      username: String(u.username ?? ""),
+      banned: Boolean(u.banned),
+    }))
+    .sort((a, b) => compareTr(a.name, b.name));
+}
+
+/** Admin: hane + ilk sahip üyeliği tek transaction'da. */
+export async function adminCreateHousehold(
+  actorId: string,
+  input: { name: string; ownerUserId: string },
+): Promise<ActionResult<{ id: string }>> {
+  const actor = new Types.ObjectId(actorId);
+  const owner = toObjectId(input.ownerUserId);
+  if (!owner) return fail(tr.validation.selectUser);
+  const ownerExists = await getDb().collection("user").countDocuments({ _id: owner }, { limit: 1 });
+  if (!ownerExists) return fail(tr.validation.selectUser);
+
+  const mongoose = await connectMongoose();
+  let createdId = "";
+  await mongoose.connection.transaction(async (session) => {
+    const [household] = await HouseholdModel.create(
+      [{ name: input.name, createdBy: actor, updatedBy: actor }],
+      {
+        session,
+      },
+    );
+    createdId = String(household!._id);
+    await HouseholdMemberModel.create(
+      [
+        {
+          householdId: household!._id,
+          userId: owner,
+          role: "owner",
+          createdBy: actor,
+          updatedBy: actor,
+        },
+      ],
+      { session },
+    );
+    await writeAudit(
+      {
+        action: "household.create",
+        actorId: actor,
+        householdId: household!._id,
+        targetType: "household",
+        targetId: createdId,
+        diff: { name: input.name, ownerUserId: input.ownerUserId },
+      },
+      session,
+    );
+    // FAZ 6: varsayılan Türkçe kategori seti bu transaction içinde yüklenecek.
+  });
+  return ok({ id: createdId });
+}
+
+/** Admin: kullanıcıyı haneye ekler (zaten üyeyse rolünü günceller). */
+export async function adminAddMember(
+  actorId: string,
+  householdId: string,
+  input: { userId: string; role: HouseholdRole },
+): Promise<ActionResult> {
+  const actor = new Types.ObjectId(actorId);
+  const hid = toObjectId(householdId);
+  const uid = toObjectId(input.userId);
+  if (!hid || !uid) return fail(tr.common.notFound);
+  await connectMongoose();
+  const household = await HouseholdModel.exists({ _id: hid, archivedAt: null });
+  const user = await getDb().collection("user").countDocuments({ _id: uid }, { limit: 1 });
+  if (!household || !user) return fail(tr.common.notFound);
+
+  const existing = await HouseholdMemberModel.findOne({ householdId: hid, userId: uid }).lean();
+  if (existing)
+    return applyMemberChange(actor, hid, input.userId, { type: "setRole", role: input.role });
+
+  await HouseholdMemberModel.create({
+    householdId: hid,
+    userId: uid,
+    role: input.role,
+    createdBy: actor,
+    updatedBy: actor,
+  });
+  await writeAudit({
+    action: "household.member.add",
+    actorId: actor,
+    householdId: hid,
+    targetType: "user",
+    targetId: input.userId,
+    diff: { role: { from: null, to: input.role } },
+  });
+  return ok(undefined);
+}
+
+export async function adminSetMemberRole(
+  actorId: string,
+  householdId: string,
+  targetUserId: string,
+  role: HouseholdRole,
+): Promise<ActionResult> {
+  const hid = toObjectId(householdId);
+  if (!hid) return fail(tr.common.notFound);
+  await connectMongoose();
+  return applyMemberChange(new Types.ObjectId(actorId), hid, targetUserId, {
+    type: "setRole",
+    role,
+  });
+}
+
+export async function adminRemoveMember(
+  actorId: string,
+  householdId: string,
+  targetUserId: string,
+): Promise<ActionResult> {
+  const hid = toObjectId(householdId);
+  if (!hid) return fail(tr.common.notFound);
+  await connectMongoose();
+  return applyMemberChange(new Types.ObjectId(actorId), hid, targetUserId, { type: "remove" });
+}
+
+/** Kullanıcı silindiğinde tüm üyeliklerini temizler (admin kullanıcı silme akışı). */
+export async function removeAllMembershipsOfUser(userId: string): Promise<number> {
+  const uid = toObjectId(userId);
+  if (!uid) return 0;
+  await connectMongoose();
+  const res = await HouseholdMemberModel.deleteMany({ userId: uid });
+  return res.deletedCount;
+}

src/i18n/tr.ts

@@ -63,6 +63,87 @@ export const tr = {
     label: "Aktif hane",
     select: "Hane seçin",
     roles: { owner: "Sahip", member: "Üye", viewer: "İzleyici" },
+    roleHints: {
+      owner: "Hane ayarları, üyeler ve hesaplar",
+      member: "İşlem girer, liste ve stok günceller",
+      viewer: "Yalnızca görüntüler",
+    },
+    switched: (name: string) => `Aktif hane: ${name}`,
+  },
+  households: {
+    lastOwner: "Hanenin son sahibi düşürülemez veya çıkarılamaz.",
+    noHousehold: {
+      title: "Henüz bir haneye üye değilsiniz",
+      description:
+        "Bütçe ve diğer verileri görmek için bir haneye üye olmanız gerekir. Yöneticiden sizi bir haneye eklemesini isteyin.",
+      adminHint:
+        "Yönetici olarak Yönetim › Haneler sayfasından hane oluşturabilir ve üye ekleyebilirsiniz.",
+      adminLink: "Hanelere git",
+    },
+    viewerReadOnly: "İzleyici rolündesiniz; bu hanede değişiklik yapamazsınız.",
+  },
+  settings: {
+    title: "Ayarlar",
+    description: "Aktif hanenin ayarları ve üyeleri.",
+    household: "Hane",
+    householdDescription: "Bütçe ve planlama tercihleri tüm hane için geçerlidir.",
+    ownerOnly: "Bu ayarları yalnızca hane sahipleri değiştirebilir.",
+    fields: {
+      name: "Hane adı",
+      budgetMonthStartDay: "Bütçe ayı başlangıç günü",
+      budgetMonthStartDayHint:
+        "1 = takvim ayı. Örneğin 15 seçilirse bütçe ayı her ayın 15. günü başlar.",
+      installmentBudgetMode: "Taksitlerin bütçeye etkisi",
+      installmentModes: {
+        per_installment: "Her taksit kendi ayına",
+        purchase_month: "Tamamı harcama ayına",
+      },
+      dailyPlanMode: "Günlük plan dağıtımı",
+      dailyPlanModes: {
+        even: "Değişken bütçe günlere eşit",
+        previous_month_pattern: "Önceki ayın harcama örüntüsüne göre",
+      },
+      includePrivateAccountsInTotals: "“Yalnızca ben” hesapları hane toplamlarına dahil edilsin",
+      extraStoreSavingThreshold: "Ek mağaza tasarruf eşiği (TL)",
+      extraStoreSavingThresholdHint:
+        "Alışveriş planlayıcı, ek bir mağazayı yalnızca tasarruf bu tutarı aşarsa önerir.",
+    },
+    saved: "Hane ayarları kaydedildi.",
+    members: "Üyeler",
+    membersDescription: "Hane içi roller. Yeni üyeyi yönetici ekler.",
+    memberActions: (name: string) => `${name} — işlemler`,
+    changeRole: "Rolü değiştir",
+    removeMember: "Haneden çıkar",
+    removeTitle: "Üye haneden çıkarılsın mı?",
+    removeDescription: (name: string, household: string) =>
+      `${name}, “${household}” hanesine artık erişemeyecek. Kullanıcı hesabı silinmez.`,
+    removeConfirm: "Haneden çıkar",
+    roleChanged: (name: string) => `${name} için rol güncellendi.`,
+    memberRemoved: (name: string) => `${name} haneden çıkarıldı.`,
+    banned: "Askıda",
+  },
+  adminHouseholds: {
+    title: "Haneler",
+    description: "Hane oluşturma, kullanıcıları haneye atama ve hane içi roller.",
+    newHousehold: "Yeni hane",
+    createTitle: "Yeni hane",
+    createDescription: "Hane oluşturulur ve seçilen kullanıcı ilk sahibi olur.",
+    name: "Hane adı",
+    owner: "İlk sahip",
+    selectUser: "Kullanıcı seçin",
+    created: (name: string) => `${name} hanesi oluşturuldu.`,
+    members: (n: number) => `${n} üye`,
+    owners: "Sahipler",
+    noOwner: "Sahibi yok",
+    addMember: "Üye ekle",
+    addMemberTitle: (household: string) => `${household} — üye ekle`,
+    addMemberDescription: "Kullanıcı zaten üyeyse rolü güncellenir.",
+    user: "Kullanıcı",
+    role: "Hane içi rol",
+    memberAdded: (name: string) => `${name} haneye eklendi.`,
+    empty: "Henüz hane yok.",
+    privacyNote:
+      "Yöneticiler haneleri ve üyelikleri yönetir; üyesi olmadıkları hanenin finansal verisini göremez.",
   },
   userMenu: {
     open: "Kullanıcı menüsü",
@@ -196,6 +277,10 @@ export const tr = {
     passwordMin: "Şifre en az 8 karakter olmalı",
     passwordMax: "Şifre en fazla 128 karakter olabilir",
     banReasonMax: "Neden en fazla 200 karakter olabilir",
+    householdNameMin: "Hane adı en az 2 karakter olmalı",
+    householdNameMax: "Hane adı en fazla 80 karakter olabilir",
+    selectUser: "Bir kullanıcı seçin",
+    wholeNumber: "Tam sayı girin",
   },
   errors: {
     notFoundTitle: "Sayfa bulunamadı",

src/lib/active-household.ts

@@ -0,0 +1,24 @@
+import "server-only";
+import { cookies } from "next/headers";
+import { env } from "@/lib/env";
+
+/**
+ * Aktif hane seçimi cookie'de tutulur. Cookie yalnızca bir TERCİHtir: DAL her istekte
+ * kullanıcının gerçekten o hanenin üyesi olduğunu doğrular; değilse ilk haneye düşer.
+ */
+export const ACTIVE_HOUSEHOLD_COOKIE = "butcem.hh";
+
+export async function readActiveHouseholdId(): Promise<string | undefined> {
+  return (await cookies()).get(ACTIVE_HOUSEHOLD_COOKIE)?.value;
+}
+
+/** Yalnızca Server Action / Route Handler içinde çağrılabilir. */
+export async function writeActiveHouseholdId(householdId: string): Promise<void> {
+  (await cookies()).set(ACTIVE_HOUSEHOLD_COOKIE, householdId, {
+    httpOnly: true,
+    sameSite: "lax",
+    secure: env().NODE_ENV === "production",
+    path: "/",
+    maxAge: 60 * 60 * 24 * 365,
+  });
+}

src/lib/audit.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, it } from "vitest";
+import { diffFields } from "./audit";
+
+describe("diffFields", () => {
+  it("yalnızca değişen alanları döner", () => {
+    expect(diffFields({ a: 1, b: "x", c: true }, { a: 2, b: "x" })).toEqual({
+      a: { from: 1, to: 2 },
+    });
+  });
+  it("iç içe değerleri içerik olarak karşılaştırır", () => {
+    expect(diffFields({ s: { d: 1 } }, { s: { d: 1 } })).toEqual({});
+  });
+});

src/lib/audit.ts

@@ -0,0 +1,41 @@
+import "server-only";
+import type { ClientSession, Types } from "mongoose";
+import { connectMongoose } from "@/lib/db/mongoose";
+import { AuditLogModel, type AuditAction } from "@/models/audit-log";
+
+export type AuditEntry = {
+  action: AuditAction;
+  actorId: Types.ObjectId | string;
+  householdId?: Types.ObjectId | null;
+  targetType: string;
+  targetId: string;
+  diff?: Record<string, unknown> | null;
+};
+
+/** Önce/sonra nesnelerinden yalnızca değişen alanları çıkarır: { alan: { from, to } }. */
+export function diffFields<T extends Record<string, unknown>>(before: T, after: Partial<T>) {
+  const out: Record<string, { from: unknown; to: unknown }> = {};
+  for (const [key, to] of Object.entries(after)) {
+    const from = before[key];
+    if (JSON.stringify(from) !== JSON.stringify(to)) out[key] = { from, to };
+  }
+  return out;
+}
+
+/**
+ * Denetim kaydı yazar. `session` verilirse transaction'ın parçası olur (işlem geri alınırsa
+ * kayıt da geri alınır). Session yoksa hata asıl işlemi bozmaz; sunucuda loglanır.
+ */
+export async function writeAudit(entry: AuditEntry, session?: ClientSession): Promise<void> {
+  const doc = { ...entry, householdId: entry.householdId ?? null, diff: entry.diff ?? null };
+  if (session) {
+    await AuditLogModel.create([doc], { session });
+    return;
+  }
+  try {
+    await connectMongoose();
+    await AuditLogModel.create(doc);
+  } catch (error) {
+    console.error("[audit] kayıt yazılamadı", entry.action, error);
+  }
+}

src/lib/dal.ts

@@ -3,6 +3,10 @@ import { headers } from "next/headers";
 import { notFound, redirect } from "next/navigation";
 import { cache } from "react";
 import type { SessionUser } from "@/features/auth/types";
+import { hasHouseholdRole, pickActiveHousehold } from "@/features/households/roles";
+import { listMemberships, resolveMembership, type Membership } from "@/features/households/service";
+import type { HouseholdRole, HouseholdSummary } from "@/features/households/types";
+import { readActiveHouseholdId } from "@/lib/active-household";
 import { getAuth } from "@/lib/auth";
 import { visibleEmail } from "@/shared/account-email";
 import type { SystemRole } from "@/shared/schemas/common";
@@ -66,3 +70,67 @@ export async function getActionUser(role?: SystemRole): Promise<SessionUser | nu
   if (role && user.role !== role) return null;
   return user;
 }
+
+// --- Hane kapsamı (veri izolasyonu) ---
+
+export type HouseholdContext = {
+  user: SessionUser;
+  /** Aktif hane; kullanıcı hiçbir haneye üye değilse null. */
+  household: HouseholdSummary | null;
+  memberships: HouseholdSummary[];
+};
+
+/**
+ * Oturum + kullanıcının haneleri + aktif hane (istek başına bir kez). Cookie'deki hane
+ * kullanıcının üyesi olduğu bir hane değilse yok sayılır ve ilk haneye düşülür.
+ * Sistem admini için ayrıcalık YOKTUR: yalnızca üyesi olduğu haneler görünür.
+ */
+export const getHouseholdContext = cache(async (): Promise<HouseholdContext | null> => {
+  const user = await getCurrentUser();
+  if (!user) return null;
+  const [memberships, preferred] = await Promise.all([
+    listMemberships(user.id),
+    readActiveHouseholdId(),
+  ]);
+  const household = pickActiveHousehold(memberships, preferred);
+  return { user, household, memberships };
+});
+
+export type ActiveHousehold = HouseholdContext & { household: HouseholdSummary };
+
+/**
+ * Sayfa: aktif hanede en az `minRole` yetkisi. Oturum yoksa /login, hanesi yoksa /hane-yok,
+ * yetkisi yetmiyorsa 404.
+ */
+export async function requireActiveHousehold(
+  minRole: HouseholdRole = "viewer",
+): Promise<ActiveHousehold> {
+  const ctx = await getHouseholdContext();
+  if (!ctx) redirect("/login");
+  if (!ctx.household) redirect("/hane-yok");
+  if (!hasHouseholdRole(ctx.household.role, minRole)) notFound();
+  return ctx as ActiveHousehold;
+}
+
+/** Server Action: aktif hanede en az `minRole` yetkisi; yoksa null (yönlendirme yapmaz). */
+export async function getHouseholdActionContext(
+  minRole: HouseholdRole = "viewer",
+): Promise<ActiveHousehold | null> {
+  const ctx = await getHouseholdContext();
+  if (!ctx?.household || !hasHouseholdRole(ctx.household.role, minRole)) return null;
+  return ctx as ActiveHousehold;
+}
+
+/**
+ * Belirli bir hane için üyelik kontrolü (ör. URL'den veya istek gövdesinden gelen householdId).
+ * Üye değilse veya yetkisi yetmiyorsa null — çağıran 404/403 döner.
+ */
+export async function requireHouseholdMember(
+  householdId: string,
+  minRole: HouseholdRole = "viewer",
+): Promise<{ user: SessionUser; membership: Membership } | null> {
+  const user = await getCurrentUser();
+  if (!user) return null;
+  const membership = await resolveMembership(user.id, householdId, minRole);
+  return membership ? { user, membership } : null;
+}

src/lib/object-id.ts

@@ -0,0 +1,8 @@
+import { Types } from "mongoose";
+
+/** Geçerli 24 haneli hex ise ObjectId, değilse null (kullanıcı girdisi asla doğrudan sorguya girmez). */
+export function toObjectId(value: unknown): Types.ObjectId | null {
+  return typeof value === "string" && /^[a-f0-9]{24}$/i.test(value)
+    ? new Types.ObjectId(value)
+    : null;
+}

src/models/audit-log.ts

@@ -0,0 +1,44 @@
+import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";
+
+/**
+ * Denetim kaydı (yalnızca eklenir, güncellenmez). Bölüm 7.2: hane ayarları, üye değişiklikleri,
+ * silmeler, aynî borç kapatma ve mutabakat düzeltmeleri; ayrıca admin kullanıcı işlemleri.
+ */
+export const AUDIT_ACTIONS = [
+  "household.create",
+  "household.settings.update",
+  "household.member.add",
+  "household.member.role",
+  "household.member.remove",
+  "user.create",
+  "user.update",
+  "user.role",
+  "user.password.reset",
+  "user.ban",
+  "user.unban",
+  "user.remove",
+] as const;
+export type AuditAction = (typeof AUDIT_ACTIONS)[number];
+
+const auditLogSchema = new Schema(
+  {
+    /** Hane kapsamındaki işlemlerde dolu; sistem (admin) işlemlerinde null. */
+    householdId: { type: Schema.Types.ObjectId, default: null },
+    actorId: { type: Schema.Types.ObjectId, required: true },
+    action: { type: String, enum: AUDIT_ACTIONS, required: true },
+    targetType: { type: String, required: true },
+    targetId: { type: String, required: true },
+    /** Değişen alanlar: { alan: { from, to } } veya özet bilgi. Şifre vb. sır asla yazılmaz. */
+    diff: { type: Schema.Types.Mixed, default: null },
+    at: { type: Date, default: () => new Date() },
+  },
+  { collection: "auditLogs", versionKey: false },
+);
+
+auditLogSchema.index({ householdId: 1, at: -1 });
+auditLogSchema.index({ actorId: 1, at: -1 });
+
+export type AuditLog = InferSchemaType<typeof auditLogSchema>;
+
+export const AuditLogModel: Model<AuditLog> =
+  (models.AuditLog as Model<AuditLog> | undefined) ?? model<AuditLog>("AuditLog", auditLogSchema);

src/shared/schemas/household.ts

@@ -0,0 +1,37 @@
+import { z } from "zod";
+import { HOUSEHOLD_ROLES } from "../../features/households/types";
+import { tr } from "../../i18n/tr";
+
+export const householdRoleSchema = z.enum(HOUSEHOLD_ROLES);
+
+export const householdNameSchema = z
+  .string()
+  .trim()
+  .min(2, tr.validation.householdNameMin)
+  .max(80, tr.validation.householdNameMax);
+
+/** Hane ayarları formu (owner). Tutarlar kuruş cinsinden tamsayı. */
+export const householdSettingsSchema = z.object({
+  name: householdNameSchema,
+  budgetMonthStartDay: z.coerce.number().int().min(1).max(28),
+  installmentBudgetMode: z.enum(["per_installment", "purchase_month"]),
+  dailyPlanMode: z.enum(["even", "previous_month_pattern"]),
+  includePrivateAccountsInTotals: z.boolean(),
+  extraStoreSavingThresholdMinor: z.coerce.number().int().min(0).max(100_000_00),
+});
+
+export const householdCreateSchema = z.object({
+  name: householdNameSchema,
+  /** İlk sahip (owner) olacak kullanıcı. */
+  ownerUserId: z.string().regex(/^[a-f0-9]{24}$/i, tr.validation.selectUser),
+});
+
+export const addMemberSchema = z.object({
+  userId: z.string().regex(/^[a-f0-9]{24}$/i, tr.validation.selectUser),
+  role: householdRoleSchema,
+});
+
+export type HouseholdSettingsInput = z.input<typeof householdSettingsSchema>;
+export type HouseholdSettings = z.output<typeof householdSettingsSchema>;
+export type HouseholdCreateInput = z.input<typeof householdCreateSchema>;
+export type AddMemberInput = z.input<typeof addMemberSchema>;