diff --git a/src/app/(app)/admin/kullanicilar/page.tsx b/src/app/(app)/admin/kullanicilar/page.tsx
new file mode 100644
index 0000000..6875a05
--- /dev/null
+++ b/src/app/(app)/admin/kullanicilar/page.tsx
@@ -0,0 +1,18 @@
+import type { Metadata } from "next";
+import { PageHeader } from "@/components/page-header";
+import { UsersTable } from "@/features/admin-users/components/users-table";
+import { MOCK_ADMIN_USERS } from "@/features/admin-users/mock";
+import { MOCK_SESSION_USER } from "@/features/auth/mock";
+import { tr } from "@/i18n/tr";
+
+export const metadata: Metadata = { title: tr.adminUsers.title };
+
+export default function AdminUsersPage() {
+  // FAZ 3: const users = await listUsers() (Better Auth admin API)
+  return (
+    <>
+      <PageHeader title={tr.adminUsers.title} description={tr.adminUsers.description} />
+      <UsersTable initialUsers={MOCK_ADMIN_USERS} currentUserId={MOCK_SESSION_USER.id} />
+    </>
+  );
+}
diff --git a/src/app/(app)/admin/layout.tsx b/src/app/(app)/admin/layout.tsx
new file mode 100644
index 0000000..7cc8092
--- /dev/null
+++ b/src/app/(app)/admin/layout.tsx
@@ -0,0 +1,11 @@
+import { notFound } from "next/navigation";
+import { MOCK_SESSION_USER } from "@/features/auth/mock";
+
+/**
+ * Yalnızca sistem admini. Admin olmayana 404 (sayfanın varlığını bile göstermez).
+ * FAZ 3: `await requireRole("admin")` (lib/dal.ts) — sunucu tarafı gerçek kontrol.
+ */
+export default function AdminLayout({ children }: { children: React.ReactNode }) {
+  if (MOCK_SESSION_USER.role !== "admin") notFound();
+  return children;
+}
diff --git a/src/features/admin-users/components/user-action-dialogs.tsx b/src/features/admin-users/components/user-action-dialogs.tsx
new file mode 100644
index 0000000..0e35b64
--- /dev/null
+++ b/src/features/admin-users/components/user-action-dialogs.tsx
@@ -0,0 +1,219 @@
+"use client";
+
+import { zodResolver } from "@hookform/resolvers/zod";
+import { Loader2 } from "lucide-react";
+import { useEffect, useState } from "react";
+import { Controller, useForm } from "react-hook-form";
+import { PasswordInput } from "@/components/password-input";
+import { ResponsiveDialog } from "@/components/responsive-dialog";
+import {
+  AlertDialog,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from "@/components/ui/alert-dialog";
+import { Button } from "@/components/ui/button";
+import { Field, FieldDescription, FieldError, FieldGroup, FieldLabel } from "@/components/ui/field";
+import { Textarea } from "@/components/ui/textarea";
+import { tr } from "@/i18n/tr";
+import type { ActionResult } from "@/lib/action-result";
+import {
+  banUserSchema,
+  setPasswordSchema,
+  type BanUserInput,
+  type SetPasswordInput,
+} from "@/shared/schemas/user";
+import type { AdminUser } from "../types";
+
+const t = tr.adminUsers;
+
+type DialogProps<T> = {
+  user: AdminUser | undefined;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onConfirm: (user: AdminUser, values: T) => Promise<ActionResult>;
+};
+
+export function SetPasswordDialog({
+  user,
+  open,
+  onOpenChange,
+  onConfirm,
+}: DialogProps<{ password: string }>) {
+  const form = useForm<SetPasswordInput>({
+    resolver: zodResolver(setPasswordSchema),
+    defaultValues: { password: "" },
+  });
+  useEffect(() => {
+    if (open) form.reset({ password: "" });
+  }, [open, form]);
+
+  async function onSubmit(values: SetPasswordInput) {
+    if (!user) return;
+    const result = await onConfirm(user, values);
+    if (result.ok) onOpenChange(false);
+    else form.setError("root", { message: result.error });
+  }
+
+  return (
+    <ResponsiveDialog
+      open={open}
+      onOpenChange={onOpenChange}
+      title={t.password.title}
+      description={user ? t.password.description(user.name) : undefined}
+      footer={
+        <>
+          <Button variant="outline" type="button" onClick={() => onOpenChange(false)}>
+            {tr.common.cancel}
+          </Button>
+          <Button type="submit" form="password-form" disabled={form.formState.isSubmitting}>
+            {form.formState.isSubmitting ? <Loader2 className="animate-spin" /> : null}
+            {t.password.confirm}
+          </Button>
+        </>
+      }
+    >
+      <form id="password-form" onSubmit={form.handleSubmit(onSubmit)} noValidate>
+        <FieldGroup>
+          <Controller
+            name="password"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="new-password">{t.password.newPassword}</FieldLabel>
+                <PasswordInput
+                  {...field}
+                  id="new-password"
+                  autoComplete="new-password"
+                  aria-invalid={fieldState.invalid}
+                  aria-describedby="new-password-hint"
+                />
+                <FieldDescription id="new-password-hint">{t.form.passwordHint}</FieldDescription>
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          {form.formState.errors.root ? (
+            <FieldError>{form.formState.errors.root.message}</FieldError>
+          ) : null}
+        </FieldGroup>
+      </form>
+    </ResponsiveDialog>
+  );
+}
+
+export function BanUserDialog({
+  user,
+  open,
+  onOpenChange,
+  onConfirm,
+}: DialogProps<{ reason?: string }>) {
+  const form = useForm<BanUserInput, unknown, { reason?: string }>({
+    resolver: zodResolver(banUserSchema),
+    defaultValues: { reason: "" },
+  });
+  useEffect(() => {
+    if (open) form.reset({ reason: "" });
+  }, [open, form]);
+
+  async function onSubmit(values: { reason?: string }) {
+    if (!user) return;
+    const result = await onConfirm(user, values);
+    if (result.ok) onOpenChange(false);
+    else form.setError("root", { message: result.error });
+  }
+
+  return (
+    <ResponsiveDialog
+      open={open}
+      onOpenChange={onOpenChange}
+      title={t.ban.title}
+      description={user ? t.ban.description(user.name) : undefined}
+      footer={
+        <>
+          <Button variant="outline" type="button" onClick={() => onOpenChange(false)}>
+            {tr.common.cancel}
+          </Button>
+          <Button
+            type="submit"
+            form="ban-form"
+            variant="destructive"
+            disabled={form.formState.isSubmitting}
+          >
+            {form.formState.isSubmitting ? <Loader2 className="animate-spin" /> : null}
+            {t.ban.confirm}
+          </Button>
+        </>
+      }
+    >
+      <form id="ban-form" onSubmit={form.handleSubmit(onSubmit)} noValidate>
+        <FieldGroup>
+          <Controller
+            name="reason"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="ban-reason">{t.ban.reason}</FieldLabel>
+                <Textarea
+                  {...field}
+                  value={field.value ?? ""}
+                  id="ban-reason"
+                  rows={3}
+                  aria-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>
+  );
+}
+
+export function DeleteUserDialog({ user, open, onOpenChange, onConfirm }: DialogProps<void>) {
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  function handleOpenChange(next: boolean) {
+    if (!next) setError(null);
+    onOpenChange(next);
+  }
+
+  async function confirm() {
+    if (!user) return;
+    setPending(true);
+    const result = await onConfirm(user, undefined);
+    setPending(false);
+    if (result.ok) handleOpenChange(false);
+    else setError(result.error);
+  }
+
+  return (
+    <AlertDialog open={open} onOpenChange={handleOpenChange}>
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>{t.remove.title}</AlertDialogTitle>
+          <AlertDialogDescription>
+            {user ? t.remove.description(user.name) : null}
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        {error ? <FieldError>{error}</FieldError> : null}
+        <AlertDialogFooter>
+          <AlertDialogCancel disabled={pending}>{tr.common.cancel}</AlertDialogCancel>
+          {/* AlertDialogAction otomatik kapanır; sonuç beklenmesi için normal düğme. */}
+          <Button variant="destructive" onClick={confirm} disabled={pending}>
+            {pending ? <Loader2 className="animate-spin" /> : null}
+            {t.remove.confirm}
+          </Button>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  );
+}
diff --git a/src/features/admin-users/components/user-form-dialog.tsx b/src/features/admin-users/components/user-form-dialog.tsx
new file mode 100644
index 0000000..f23d400
--- /dev/null
+++ b/src/features/admin-users/components/user-form-dialog.tsx
@@ -0,0 +1,226 @@
+"use client";
+
+import { zodResolver } from "@hookform/resolvers/zod";
+import { Loader2 } from "lucide-react";
+import { useEffect } from "react";
+import { Controller, useForm, type Resolver } from "react-hook-form";
+import { PasswordInput } from "@/components/password-input";
+import { ResponsiveDialog } from "@/components/responsive-dialog";
+import { Button } from "@/components/ui/button";
+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 { tr } from "@/i18n/tr";
+import type { ActionResult } from "@/lib/action-result";
+import { SYSTEM_ROLES } from "@/shared/schemas/common";
+import {
+  userCreateSchema,
+  userUpdateSchema,
+  type UserCreate,
+  type UserCreateInput,
+  type UserUpdate,
+} from "@/shared/schemas/user";
+import type { AdminUser } from "../types";
+
+const t = tr.adminUsers.form;
+const FORM_ID = "user-form";
+
+type Props = {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  /** Verilirse düzenleme modu. */
+  user?: AdminUser;
+  onCreate: (values: UserCreate) => Promise<ActionResult>;
+  onUpdate: (id: string, values: UserUpdate) => Promise<ActionResult>;
+};
+
+type FormOutput = UserCreate | UserUpdate;
+
+const createResolver: Resolver<UserCreateInput, unknown, FormOutput> =
+  zodResolver(userCreateSchema);
+/**
+ * Düzenleme şeması şifre alanını içermez; zod nesnesi bilinmeyen alanı (boş "password") atar.
+ * Form değer şekli aynı kaldığı için tip dönüşümü güvenlidir.
+ */
+const updateResolver = zodResolver(userUpdateSchema) as unknown as Resolver<
+  UserCreateInput,
+  unknown,
+  FormOutput
+>;
+
+const empty: UserCreateInput = { name: "", username: "", email: "", role: "user", password: "" };
+
+export function UserFormDialog({ open, onOpenChange, user, onCreate, onUpdate }: Props) {
+  const isEdit = Boolean(user);
+  const form = useForm<UserCreateInput, unknown, FormOutput>({
+    resolver: isEdit ? updateResolver : createResolver,
+    defaultValues: empty,
+  });
+
+  useEffect(() => {
+    if (open) {
+      form.reset(
+        user
+          ? {
+              name: user.name,
+              username: user.username,
+              email: user.email ?? "",
+              role: user.role,
+              password: "",
+            }
+          : empty,
+      );
+    }
+  }, [open, user, form]);
+
+  async function onSubmit(values: FormOutput) {
+    const result = user ? await onUpdate(user.id, values) : await onCreate(values as UserCreate);
+    if (result.ok) {
+      onOpenChange(false);
+      return;
+    }
+    for (const [name, message] of Object.entries(result.fieldErrors ?? {})) {
+      if (message) form.setError(name as keyof UserCreateInput, { message });
+    }
+    if (!result.fieldErrors) form.setError("root", { message: result.error });
+  }
+
+  const submitting = form.formState.isSubmitting;
+
+  return (
+    <ResponsiveDialog
+      open={open}
+      onOpenChange={onOpenChange}
+      title={isEdit ? t.editTitle : t.createTitle}
+      description={isEdit ? t.editDescription : t.createDescription}
+      footer={
+        <>
+          <Button variant="outline" type="button" onClick={() => onOpenChange(false)}>
+            {tr.common.cancel}
+          </Button>
+          <Button type="submit" form={FORM_ID} disabled={submitting}>
+            {submitting ? <Loader2 className="animate-spin" /> : null}
+            {isEdit ? tr.common.save : tr.common.create}
+          </Button>
+        </>
+      }
+    >
+      <form id={FORM_ID} onSubmit={form.handleSubmit(onSubmit)} noValidate>
+        <FieldGroup>
+          <Controller
+            name="name"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="user-name">{t.name}</FieldLabel>
+                <Input
+                  {...field}
+                  id="user-name"
+                  autoComplete="off"
+                  aria-invalid={fieldState.invalid}
+                />
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="username"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="user-username">{t.username}</FieldLabel>
+                <Input
+                  {...field}
+                  id="user-username"
+                  autoComplete="off"
+                  autoCapitalize="none"
+                  spellCheck={false}
+                  aria-invalid={fieldState.invalid}
+                  aria-describedby="user-username-hint"
+                />
+                <FieldDescription id="user-username-hint">{t.usernameHint}</FieldDescription>
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="email"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="user-email">{t.email}</FieldLabel>
+                <Input
+                  {...field}
+                  value={field.value ?? ""}
+                  id="user-email"
+                  type="email"
+                  inputMode="email"
+                  autoComplete="off"
+                  aria-invalid={fieldState.invalid}
+                  aria-describedby="user-email-hint"
+                />
+                <FieldDescription id="user-email-hint">{t.emailHint}</FieldDescription>
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          <Controller
+            name="role"
+            control={form.control}
+            render={({ field, fieldState }) => (
+              <Field data-invalid={fieldState.invalid}>
+                <FieldLabel htmlFor="user-role">{t.role}</FieldLabel>
+                <Select name={field.name} value={field.value} onValueChange={field.onChange}>
+                  <SelectTrigger
+                    id="user-role"
+                    aria-invalid={fieldState.invalid}
+                    onBlur={field.onBlur}
+                  >
+                    <SelectValue>{tr.roles[field.value]}</SelectValue>
+                  </SelectTrigger>
+                  <SelectContent>
+                    {SYSTEM_ROLES.map((r) => (
+                      <SelectItem key={r} value={r}>
+                        {tr.roles[r]}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+              </Field>
+            )}
+          />
+          {!isEdit ? (
+            <Controller
+              name="password"
+              control={form.control}
+              render={({ field, fieldState }) => (
+                <Field data-invalid={fieldState.invalid}>
+                  <FieldLabel htmlFor="user-password">{t.password}</FieldLabel>
+                  <PasswordInput
+                    {...field}
+                    id="user-password"
+                    autoComplete="new-password"
+                    aria-invalid={fieldState.invalid}
+                    aria-describedby="user-password-hint"
+                  />
+                  <FieldDescription id="user-password-hint">{t.passwordHint}</FieldDescription>
+                  {fieldState.invalid ? <FieldError errors={[fieldState.error]} /> : null}
+                </Field>
+              )}
+            />
+          ) : null}
+          {form.formState.errors.root ? (
+            <FieldError>{form.formState.errors.root.message}</FieldError>
+          ) : null}
+        </FieldGroup>
+      </form>
+    </ResponsiveDialog>
+  );
+}
diff --git a/src/features/admin-users/components/users-table.tsx b/src/features/admin-users/components/users-table.tsx
new file mode 100644
index 0000000..e0486a9
--- /dev/null
+++ b/src/features/admin-users/components/users-table.tsx
@@ -0,0 +1,572 @@
+"use client";
+
+import {
+  ArrowDown,
+  ArrowUp,
+  ArrowUpDown,
+  Ban,
+  ChevronLeft,
+  ChevronRight,
+  KeyRound,
+  MoreHorizontal,
+  Pencil,
+  Plus,
+  Search,
+  ShieldCheck,
+  ShieldOff,
+  Trash2,
+  UserCheck,
+} from "lucide-react";
+import { createContext, use, useState } from "react";
+import { toast } from "sonner";
+import {
+  columnFilteringFeature,
+  createColumnHelper,
+  createFilteredRowModel,
+  createPaginatedRowModel,
+  createSortedRowModel,
+  globalFilteringFeature,
+  rowPaginationFeature,
+  rowSortingFeature,
+  tableFeatures,
+  useTable,
+  type SortFn,
+} from "@tanstack/react-table";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { InputGroup, InputGroupAddon, InputGroupInput } from "@/components/ui/input-group";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import {
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+} from "@/components/ui/table";
+import { tr } from "@/i18n/tr";
+import { fail, ok, type ActionResult } from "@/lib/action-result";
+import { cn } from "@/lib/utils";
+import { formatDate } from "@/shared/format";
+import type { SystemRole } from "@/shared/schemas/common";
+import type { UserCreate, UserUpdate } from "@/shared/schemas/user";
+import { compareTr, includesTr } from "@/shared/search";
+import {
+  checkAdminAction,
+  findUniqueConflicts,
+  type AdminAction,
+  type GuardViolation,
+} from "../guards";
+import type { AdminUser } from "../types";
+import { BanUserDialog, DeleteUserDialog, SetPasswordDialog } from "./user-action-dialogs";
+import { UserFormDialog } from "./user-form-dialog";
+
+const t = tr.adminUsers;
+
+// --- Tablo yapılandırması (modül seviyesinde sabit: v9 kararlı girdi ister) ---
+
+const features = tableFeatures({
+  rowSortingFeature,
+  sortedRowModel: createSortedRowModel(),
+  columnFilteringFeature,
+  globalFilteringFeature,
+  filteredRowModel: createFilteredRowModel(),
+  rowPaginationFeature,
+  paginatedRowModel: createPaginatedRowModel(),
+});
+
+const byTr: SortFn<typeof features, AdminUser> = (a, b, id) =>
+  compareTr(String(a.getValue(id) ?? ""), String(b.getValue(id) ?? ""));
+
+const helper = createColumnHelper<typeof features, AdminUser>();
+
+/** Mobilde gizlenen sütunlar. */
+const COLUMN_CLASS: Partial<Record<string, string>> = {
+  username: "hidden sm:table-cell",
+  email: "hidden lg:table-cell",
+  createdAt: "hidden md:table-cell",
+  actions: "w-12 text-right",
+};
+
+const PAGE_SIZES = [10, 20, 50] as const;
+
+type DialogState =
+  { kind: "create" } | { kind: "edit" | "password" | "ban" | "delete"; user: AdminUser } | null;
+
+function SortableHeader({
+  label,
+  sorted,
+  onToggle,
+}: {
+  label: string;
+  sorted: false | "asc" | "desc";
+  onToggle: ((event: unknown) => void) | undefined;
+}) {
+  const Icon = sorted === "asc" ? ArrowUp : sorted === "desc" ? ArrowDown : ArrowUpDown;
+  return (
+    <Button
+      variant="ghost"
+      size="sm"
+      className="-ml-2.5"
+      onClick={onToggle}
+      aria-label={`${label} — sırala`}
+    >
+      {label}
+      <Icon className={cn("size-3.5", !sorted && "opacity-40")} />
+    </Button>
+  );
+}
+
+type RowActionsApi = {
+  currentUserId: string;
+  guard: (action: AdminAction, target: AdminUser) => GuardViolation | null;
+  guardMessage: (v: GuardViolation) => string;
+  setDialog: (d: DialogState) => void;
+  setRole: (user: AdminUser, role: SystemRole) => void;
+  unbanUser: (user: AdminUser) => void;
+};
+
+/** Satır aksiyonları güncel durumu context'ten okur; sütunlar modül seviyesinde sabit kalır. */
+const RowActionsContext = createContext<RowActionsApi | null>(null);
+
+function useRowActions() {
+  const ctx = use(RowActionsContext);
+  if (!ctx) throw new Error("RowActionsContext eksik");
+  return ctx;
+}
+
+function NameCell({ user }: { user: AdminUser }) {
+  const { currentUserId } = useRowActions();
+  return (
+    <div className="flex min-w-0 flex-col">
+      <span className="truncate font-medium">
+        {user.name}
+        {user.id === currentUserId ? (
+          <span className="ml-1.5 text-xs font-normal text-muted-foreground">({t.you})</span>
+        ) : null}
+      </span>
+      <span className="truncate text-xs text-muted-foreground sm:hidden">@{user.username}</span>
+    </div>
+  );
+}
+
+function RowActions({ user }: { user: AdminUser }) {
+  const { guard, guardMessage, setDialog, setRole, unbanUser } = useRowActions();
+  const del = guard({ type: "delete" }, user);
+  const ban = guard({ type: "ban" }, user);
+  const toggleRole: SystemRole = user.role === "admin" ? "user" : "admin";
+  const role = guard({ type: "setRole", role: toggleRole }, user);
+  const blocked = del ?? role;
+  return (
+    // modal={false}: menüden açılan Dialog kapandıktan sonra sayfanın kilitli kalmasını önler.
+    <DropdownMenu modal={false}>
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size="icon-sm" aria-label={`${user.name} — ${tr.common.actions}`}>
+          <MoreHorizontal />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="w-56">
+        <DropdownMenuLabel className="truncate">{user.name}</DropdownMenuLabel>
+        <DropdownMenuItem onSelect={() => setDialog({ kind: "edit", user })}>
+          <Pencil />
+          {t.actions.edit}
+        </DropdownMenuItem>
+        <DropdownMenuItem disabled={Boolean(role)} onSelect={() => setRole(user, toggleRole)}>
+          {toggleRole === "admin" ? <ShieldCheck /> : <ShieldOff />}
+          {toggleRole === "admin" ? t.actions.makeAdmin : t.actions.makeUser}
+        </DropdownMenuItem>
+        <DropdownMenuItem onSelect={() => setDialog({ kind: "password", user })}>
+          <KeyRound />
+          {t.actions.resetPassword}
+        </DropdownMenuItem>
+        {user.banned ? (
+          <DropdownMenuItem onSelect={() => unbanUser(user)}>
+            <UserCheck />
+            {t.actions.unban}
+          </DropdownMenuItem>
+        ) : (
+          <DropdownMenuItem
+            disabled={Boolean(ban)}
+            onSelect={() => setDialog({ kind: "ban", user })}
+          >
+            <Ban />
+            {t.actions.ban}
+          </DropdownMenuItem>
+        )}
+        <DropdownMenuSeparator />
+        <DropdownMenuItem
+          variant="destructive"
+          disabled={Boolean(del)}
+          onSelect={() => setDialog({ kind: "delete", user })}
+        >
+          <Trash2 />
+          {t.actions.delete}
+        </DropdownMenuItem>
+        {blocked ? (
+          <p className="px-2 py-1.5 text-xs text-muted-foreground">{guardMessage(blocked)}</p>
+        ) : null}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}
+
+const columns = helper.columns([
+  helper.accessor("name", {
+    header: ({ column }) => (
+      <SortableHeader
+        label={t.columns.name}
+        sorted={column.getIsSorted()}
+        onToggle={column.getToggleSortingHandler()}
+      />
+    ),
+    sortFn: byTr,
+    cell: ({ row }) => <NameCell user={row.original} />,
+  }),
+  helper.accessor("username", {
+    header: ({ column }) => (
+      <SortableHeader
+        label={t.columns.username}
+        sorted={column.getIsSorted()}
+        onToggle={column.getToggleSortingHandler()}
+      />
+    ),
+    sortFn: byTr,
+    cell: ({ getValue }) => <span className="text-muted-foreground">@{getValue()}</span>,
+  }),
+  helper.accessor((u) => u.email ?? "", {
+    id: "email",
+    header: ({ column }) => (
+      <SortableHeader
+        label={t.columns.email}
+        sorted={column.getIsSorted()}
+        onToggle={column.getToggleSortingHandler()}
+      />
+    ),
+    sortFn: byTr,
+    cell: ({ getValue }) =>
+      getValue() || <span className="text-muted-foreground">{t.noEmail}</span>,
+  }),
+  helper.accessor("role", {
+    header: ({ column }) => (
+      <SortableHeader
+        label={t.columns.role}
+        sorted={column.getIsSorted()}
+        onToggle={column.getToggleSortingHandler()}
+      />
+    ),
+    cell: ({ getValue }) => (
+      <Badge variant={getValue() === "admin" ? "default" : "secondary"}>
+        {tr.roles[getValue()]}
+      </Badge>
+    ),
+  }),
+  helper.accessor("banned", {
+    header: ({ column }) => (
+      <SortableHeader
+        label={t.columns.status}
+        sorted={column.getIsSorted()}
+        onToggle={column.getToggleSortingHandler()}
+      />
+    ),
+    cell: ({ row }) =>
+      row.original.banned ? (
+        <Badge variant="destructive" title={row.original.banReason}>
+          {t.status.banned}
+        </Badge>
+      ) : (
+        <Badge variant="outline" className="border-income/30 text-income">
+          {t.status.active}
+        </Badge>
+      ),
+  }),
+  helper.accessor("createdAt", {
+    header: ({ column }) => (
+      <SortableHeader
+        label={t.columns.createdAt}
+        sorted={column.getIsSorted()}
+        onToggle={column.getToggleSortingHandler()}
+      />
+    ),
+    cell: ({ getValue }) => <span className="tabular-nums">{formatDate(getValue())}</span>,
+  }),
+  helper.display({
+    id: "actions",
+    header: () => <span className="sr-only">{tr.common.actions}</span>,
+    cell: ({ row }) => <RowActions user={row.original} />,
+  }),
+]);
+
+export function UsersTable({
+  initialUsers,
+  currentUserId,
+}: {
+  initialUsers: AdminUser[];
+  currentUserId: string;
+}) {
+  // FAZ 3: yerel durum yerine Server Action + revalidatePath.
+  const [users, setUsers] = useState(initialUsers);
+  const [dialog, setDialog] = useState<DialogState>(null);
+  const adminCount = users.filter((u) => u.role === "admin").length;
+
+  const guard = (action: AdminAction, target: AdminUser): GuardViolation | null =>
+    checkAdminAction(action, { actorId: currentUserId, target, adminCount });
+
+  const guardMessage = (v: GuardViolation) => (v === "self" ? t.guards.self : t.guards.lastAdmin);
+
+  // --- Mock işlemler (FAZ 3'te Server Action'lara taşınacak; aynı ActionResult sözleşmesi) ---
+
+  async function createUser(values: UserCreate): Promise<ActionResult> {
+    const conflicts = findUniqueConflicts(users, values);
+    if (conflicts.username || conflicts.email) {
+      return fail(t.errors.checkFields, {
+        username: conflicts.username && t.errors.usernameTaken,
+        email: conflicts.email && t.errors.emailTaken,
+      });
+    }
+    const { password: _password, ...rest } = values;
+    setUsers((prev) => [
+      {
+        ...rest,
+        id: `u_${crypto.randomUUID().slice(0, 8)}`,
+        banned: false,
+        createdAt: new Date().toISOString(),
+      },
+      ...prev,
+    ]);
+    toast.success(t.toast.created(values.name));
+    return ok(undefined);
+  }
+
+  async function updateUser(id: string, values: UserUpdate): Promise<ActionResult> {
+    const target = users.find((u) => u.id === id);
+    if (!target) return fail(tr.common.genericError);
+    const conflicts = findUniqueConflicts(users, values, id);
+    if (conflicts.username || conflicts.email) {
+      return fail(t.errors.checkFields, {
+        username: conflicts.username && t.errors.usernameTaken,
+        email: conflicts.email && t.errors.emailTaken,
+      });
+    }
+    const v =
+      values.role !== target.role ? guard({ type: "setRole", role: values.role }, target) : null;
+    if (v) return fail(guardMessage(v), { role: guardMessage(v) });
+    setUsers((prev) => prev.map((u) => (u.id === id ? { ...u, ...values } : u)));
+    toast.success(t.toast.updated(values.name));
+    return ok(undefined);
+  }
+
+  function setRole(user: AdminUser, role: SystemRole) {
+    const v = guard({ type: "setRole", role }, user);
+    if (v) return void toast.error(guardMessage(v));
+    setUsers((prev) => prev.map((u) => (u.id === user.id ? { ...u, role } : u)));
+    toast.success(t.toast.roleChanged(user.name));
+  }
+
+  async function setPassword(user: AdminUser): Promise<ActionResult> {
+    toast.success(t.toast.passwordSet(user.name));
+    return ok(undefined);
+  }
+
+  async function banUser(user: AdminUser, { reason }: { reason?: string }): Promise<ActionResult> {
+    const v = guard({ type: "ban" }, user);
+    if (v) return fail(guardMessage(v));
+    setUsers((prev) =>
+      prev.map((u) => (u.id === user.id ? { ...u, banned: true, banReason: reason } : u)),
+    );
+    toast.success(t.toast.banned(user.name));
+    return ok(undefined);
+  }
+
+  function unbanUser(user: AdminUser) {
+    setUsers((prev) =>
+      prev.map((u) => (u.id === user.id ? { ...u, banned: false, banReason: undefined } : u)),
+    );
+    toast.success(t.toast.unbanned(user.name));
+  }
+
+  async function removeUser(user: AdminUser): Promise<ActionResult> {
+    const v = guard({ type: "delete" }, user);
+    if (v) return fail(guardMessage(v));
+    setUsers((prev) => prev.filter((u) => u.id !== user.id));
+    toast.success(t.toast.removed(user.name));
+    return ok(undefined);
+  }
+
+  const table = useTable({
+    features,
+    columns,
+    data: users,
+    // Türkçe, büyük/küçük harf ve aksan duyarsız arama (ad, kullanıcı adı, e-posta).
+    globalFilterFn: (row, _columnId, filterValue) => {
+      const q = String(filterValue ?? "");
+      const u = row.original;
+      return includesTr(u.name, q) || includesTr(u.username, q) || includesTr(u.email, q);
+    },
+    getColumnCanGlobalFilter: (column) => column.id !== "actions",
+    initialState: {
+      sorting: [{ id: "createdAt", desc: true }],
+      pagination: { pageIndex: 0, pageSize: 10 },
+    },
+  });
+
+  const globalFilter = String(table.state.globalFilter ?? "");
+  const pageCount = Math.max(table.getPageCount(), 1);
+  const filteredCount = table.getFilteredRowModel().rows.length;
+  const selected = dialog && dialog.kind !== "create" ? dialog.user : undefined;
+  const close = (open: boolean) => !open && setDialog(null);
+
+  const rowActions: RowActionsApi = {
+    currentUserId,
+    guard,
+    guardMessage,
+    setDialog,
+    setRole,
+    unbanUser,
+  };
+
+  return (
+    <RowActionsContext value={rowActions}>
+      <div className="flex flex-col gap-3">
+        <div className="flex flex-wrap items-center gap-2">
+          <InputGroup className="max-w-sm flex-1">
+            <InputGroupAddon>
+              <Search />
+            </InputGroupAddon>
+            <InputGroupInput
+              type="search"
+              value={globalFilter}
+              onChange={(e) => table.setGlobalFilter(e.target.value)}
+              placeholder={t.searchPlaceholder}
+              aria-label={tr.common.search}
+            />
+          </InputGroup>
+          <Button className="ml-auto" onClick={() => setDialog({ kind: "create" })}>
+            <Plus />
+            {t.newUser}
+          </Button>
+        </div>
+
+        <div className="overflow-hidden rounded-xl border bg-card">
+          <Table>
+            <TableHeader>
+              {table.getHeaderGroups().map((group) => (
+                <TableRow key={group.id}>
+                  {group.headers.map((header) => (
+                    <TableHead key={header.id} className={COLUMN_CLASS[header.column.id]}>
+                      {header.isPlaceholder ? null : <table.FlexRender header={header} />}
+                    </TableHead>
+                  ))}
+                </TableRow>
+              ))}
+            </TableHeader>
+            <TableBody>
+              {table.getRowModel().rows.length ? (
+                table.getRowModel().rows.map((row) => (
+                  <TableRow key={row.id} className={cn(row.original.banned && "opacity-70")}>
+                    {row.getAllCells().map((cell) => (
+                      <TableCell key={cell.id} className={COLUMN_CLASS[cell.column.id]}>
+                        <table.FlexRender cell={cell} />
+                      </TableCell>
+                    ))}
+                  </TableRow>
+                ))
+              ) : (
+                <TableRow>
+                  <TableCell
+                    colSpan={columns.length}
+                    className="h-24 text-center text-muted-foreground"
+                  >
+                    {tr.common.noResults}
+                  </TableCell>
+                </TableRow>
+              )}
+            </TableBody>
+          </Table>
+        </div>
+
+        <div className="flex flex-wrap items-center justify-between gap-3 text-sm text-muted-foreground">
+          <span>{tr.common.totalRows(filteredCount)}</span>
+          <div className="flex items-center gap-2">
+            <span className="hidden sm:inline">{tr.common.rowsPerPage}</span>
+            <Select
+              value={String(table.state.pagination.pageSize)}
+              onValueChange={(v) => table.setPageSize(Number(v))}
+            >
+              <SelectTrigger size="sm" aria-label={tr.common.rowsPerPage} className="w-18">
+                <SelectValue>{table.state.pagination.pageSize}</SelectValue>
+              </SelectTrigger>
+              <SelectContent>
+                {PAGE_SIZES.map((n) => (
+                  <SelectItem key={n} value={String(n)}>
+                    {n}
+                  </SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+            <span className="tabular-nums">
+              {tr.common.page(table.state.pagination.pageIndex + 1, pageCount)}
+            </span>
+            <Button
+              variant="outline"
+              size="icon-sm"
+              onClick={() => table.previousPage()}
+              disabled={!table.getCanPreviousPage()}
+              aria-label={tr.common.previous}
+            >
+              <ChevronLeft />
+            </Button>
+            <Button
+              variant="outline"
+              size="icon-sm"
+              onClick={() => table.nextPage()}
+              disabled={!table.getCanNextPage()}
+              aria-label={tr.common.next}
+            >
+              <ChevronRight />
+            </Button>
+          </div>
+        </div>
+
+        <UserFormDialog
+          open={dialog?.kind === "create" || dialog?.kind === "edit"}
+          onOpenChange={close}
+          user={dialog?.kind === "edit" ? dialog.user : undefined}
+          onCreate={createUser}
+          onUpdate={updateUser}
+        />
+        <SetPasswordDialog
+          user={selected}
+          open={dialog?.kind === "password"}
+          onOpenChange={close}
+          onConfirm={setPassword}
+        />
+        <BanUserDialog
+          user={selected}
+          open={dialog?.kind === "ban"}
+          onOpenChange={close}
+          onConfirm={banUser}
+        />
+        <DeleteUserDialog
+          user={selected}
+          open={dialog?.kind === "delete"}
+          onOpenChange={close}
+          onConfirm={removeUser}
+        />
+      </div>
+    </RowActionsContext>
+  );
+}
diff --git a/src/features/admin-users/guards.test.ts b/src/features/admin-users/guards.test.ts
new file mode 100644
index 0000000..8df02f7
--- /dev/null
+++ b/src/features/admin-users/guards.test.ts
@@ -0,0 +1,59 @@
+import { describe, expect, it } from "vitest";
+import { checkAdminAction, findUniqueConflicts } from "./guards";
+
+const admin = { id: "a1", role: "admin" as const };
+const user = { id: "u1", role: "user" as const };
+
+describe("checkAdminAction", () => {
+  it("admin kendini silemez, askıya alamaz, rolünü düşüremez", () => {
+    const ctx = { actorId: "a1", target: admin, adminCount: 3 };
+    expect(checkAdminAction({ type: "delete" }, ctx)).toBe("self");
+    expect(checkAdminAction({ type: "ban" }, ctx)).toBe("self");
+    expect(checkAdminAction({ type: "setRole", role: "user" }, ctx)).toBe("self");
+  });
+
+  it("admin kendi bilgisini ve şifresini değiştirebilir", () => {
+    const ctx = { actorId: "a1", target: admin, adminCount: 1 };
+    expect(checkAdminAction({ type: "edit" }, ctx)).toBeNull();
+    expect(checkAdminAction({ type: "setPassword" }, ctx)).toBeNull();
+    expect(checkAdminAction({ type: "setRole", role: "admin" }, ctx)).toBeNull();
+  });
+
+  it("son admin silinemez, askıya alınamaz, düşürülemez", () => {
+    const ctx = { actorId: "x", target: admin, adminCount: 1 };
+    expect(checkAdminAction({ type: "delete" }, ctx)).toBe("lastAdmin");
+    expect(checkAdminAction({ type: "ban" }, ctx)).toBe("lastAdmin");
+    expect(checkAdminAction({ type: "setRole", role: "user" }, ctx)).toBe("lastAdmin");
+  });
+
+  it("birden çok admin varken başka bir admin düşürülebilir", () => {
+    const ctx = { actorId: "x", target: admin, adminCount: 2 };
+    expect(checkAdminAction({ type: "setRole", role: "user" }, ctx)).toBeNull();
+    expect(checkAdminAction({ type: "delete" }, ctx)).toBeNull();
+  });
+
+  it("normal kullanıcıya her işlem yapılabilir", () => {
+    const ctx = { actorId: "a1", target: user, adminCount: 1 };
+    for (const t of ["delete", "ban", "edit", "setPassword"] as const) {
+      expect(checkAdminAction({ type: t }, ctx)).toBeNull();
+    }
+    expect(checkAdminAction({ type: "setRole", role: "admin" }, ctx)).toBeNull();
+  });
+});
+
+describe("findUniqueConflicts", () => {
+  const users = [
+    { id: "1", username: "ayse", email: "ayse@x.com" },
+    { id: "2", username: "emre" },
+  ];
+  it("çakışan kullanıcı adı ve e-postayı bulur", () => {
+    expect(findUniqueConflicts(users, { username: "ayse", email: "ayse@x.com" })).toEqual({
+      username: "taken",
+      email: "taken",
+    });
+  });
+  it("düzenlenen kaydın kendisini saymaz, boş e-postayı kontrol etmez", () => {
+    expect(findUniqueConflicts(users, { username: "ayse", email: "ayse@x.com" }, "1")).toEqual({});
+    expect(findUniqueConflicts(users, { username: "yeni" })).toEqual({});
+  });
+});
diff --git a/src/features/admin-users/guards.ts b/src/features/admin-users/guards.ts
new file mode 100644
index 0000000..a3230e1
--- /dev/null
+++ b/src/features/admin-users/guards.ts
@@ -0,0 +1,52 @@
+import type { SystemRole } from "@/shared/schemas/common";
+
+export type AdminAction =
+  | { type: "delete" }
+  | { type: "ban" }
+  | { type: "setRole"; role: SystemRole }
+  | { type: "edit" }
+  | { type: "setPassword" };
+
+export type GuardContext = {
+  actorId: string;
+  target: { id: string; role: SystemRole };
+  /** Sistemdeki toplam admin sayısı (hedef dahil). */
+  adminCount: number;
+};
+
+export type GuardViolation = "self" | "lastAdmin";
+
+/**
+ * Admin işlem kuralları (arayüz ve sunucu aynı fonksiyonu kullanır):
+ * - Admin kendini silemez, askıya alamaz ve kendi admin rolünü kaldıramaz.
+ * - Sistemdeki son admin silinemez, askıya alınamaz veya rolü düşürülemez.
+ */
+export function checkAdminAction(action: AdminAction, ctx: GuardContext): GuardViolation | null {
+  const isSelf = ctx.actorId === ctx.target.id;
+  const removesAdmin =
+    ctx.target.role === "admin" &&
+    (action.type === "delete" ||
+      action.type === "ban" ||
+      (action.type === "setRole" && action.role !== "admin"));
+
+  if (isSelf && (action.type === "delete" || action.type === "ban" || removesAdmin)) {
+    return "self";
+  }
+  if (removesAdmin && ctx.adminCount <= 1) return "lastAdmin";
+  return null;
+}
+
+/** Kullanıcı adı / e-posta benzersizlik kontrolü (normalize edilmiş değerlerle). */
+export function findUniqueConflicts(
+  users: ReadonlyArray<{ id: string; username: string; email?: string }>,
+  values: { username: string; email?: string },
+  excludeId?: string,
+): { username?: "taken"; email?: "taken" } {
+  const others = users.filter((u) => u.id !== excludeId);
+  return {
+    ...(others.some((u) => u.username === values.username) ? { username: "taken" as const } : {}),
+    ...(values.email && others.some((u) => u.email === values.email)
+      ? { email: "taken" as const }
+      : {}),
+  };
+}
diff --git a/src/features/admin-users/mock.ts b/src/features/admin-users/mock.ts
new file mode 100644
index 0000000..724387a
--- /dev/null
+++ b/src/features/admin-users/mock.ts
@@ -0,0 +1,111 @@
+import type { AdminUser } from "./types";
+
+/** FAZ 2 GEÇİCİ: Faz 3'te Better Auth admin API'sinden gelen listeyle değiştirilecek. */
+export const MOCK_ADMIN_USERS: AdminUser[] = [
+  {
+    id: "u_admin",
+    name: "Suphi Çakır",
+    username: "suphi",
+    email: "admin@butcem.local",
+    role: "admin",
+    banned: false,
+    createdAt: "2026-05-02T08:00:00Z",
+  },
+  {
+    id: "u_ayse",
+    name: "Ayşe Çakır",
+    username: "ayse",
+    email: "ayse@butcem.local",
+    role: "user",
+    banned: false,
+    createdAt: "2026-05-02T08:10:00Z",
+  },
+  {
+    id: "u_emre",
+    name: "Emre Çakır",
+    username: "emre",
+    role: "user",
+    banned: false,
+    createdAt: "2026-05-03T17:45:00Z",
+  },
+  {
+    id: "u_zeynep",
+    name: "Zeynep Çakır",
+    username: "zeynep",
+    role: "user",
+    banned: false,
+    createdAt: "2026-05-03T17:50:00Z",
+  },
+  {
+    id: "u_fatma",
+    name: "Fatma Demir",
+    username: "fatma.demir",
+    email: "fatma@butcem.local",
+    role: "user",
+    banned: false,
+    createdAt: "2026-06-11T12:00:00Z",
+  },
+  {
+    id: "u_mehmet",
+    name: "Mehmet Demir",
+    username: "mehmet.demir",
+    email: "mehmet@butcem.local",
+    role: "user",
+    banned: false,
+    createdAt: "2026-06-11T12:05:00Z",
+  },
+  {
+    id: "u_ozan",
+    name: "Ozan Kaya",
+    username: "ozan",
+    email: "ozan@butcem.local",
+    role: "user",
+    banned: true,
+    banReason: "Eski ev arkadaşı",
+    createdAt: "2026-07-20T09:30:00Z",
+  },
+  {
+    id: "u_elif",
+    name: "Elif Şahin",
+    username: "elif_s",
+    email: "elif@butcem.local",
+    role: "user",
+    banned: false,
+    createdAt: "2026-08-14T19:15:00Z",
+  },
+  {
+    id: "u_burak",
+    name: "Burak Öztürk",
+    username: "burak",
+    email: "burak@butcem.local",
+    role: "admin",
+    banned: false,
+    createdAt: "2026-09-01T06:40:00Z",
+  },
+  {
+    id: "u_irem",
+    name: "İrem Güneş",
+    username: "irem",
+    role: "user",
+    banned: false,
+    createdAt: "2026-09-22T15:00:00Z",
+  },
+  {
+    id: "u_can",
+    name: "Can Yıldız",
+    username: "can.y",
+    email: "can@butcem.local",
+    role: "user",
+    banned: false,
+    createdAt: "2026-10-05T10:20:00Z",
+  },
+  {
+    id: "u_selin",
+    name: "Selin Aydın",
+    username: "selin",
+    email: "selin@butcem.local",
+    role: "user",
+    banned: false,
+    createdAt: "2026-10-30T21:05:00Z",
+  },
+];
diff --git a/src/features/admin-users/types.ts b/src/features/admin-users/types.ts
new file mode 100644
index 0000000..08d9d40
--- /dev/null
+++ b/src/features/admin-users/types.ts
@@ -0,0 +1,14 @@
+import type { SystemRole } from "@/shared/schemas/common";
+
+/** Admin kullanıcı listesindeki satır (Better Auth user kaydının arayüz özeti). */
+export type AdminUser = {
+  id: string;
+  name: string;
+  username: string;
+  email?: string;
+  role: SystemRole;
+  banned: boolean;
+  banReason?: string;
+  /** ISO tarih (UTC) */
+  createdAt: string;
+};