feat(system-config): add system configs and feature flags management UI

src/app/(auth)/register/page.tsx

@@ -20,6 +20,7 @@ import {
 import { registerSchema, RegisterInput } from "@/schemas/auth.schema";
 import { useAuth } from "@/hooks/use-auth";
 import { useLanguage } from "@/providers/language-provider";
+import { usePublicConfigs } from "@/hooks/use-system-config";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -27,6 +28,11 @@ import { Label } from "@/components/ui/label";
 export default function RegisterPage() {
   const { t } = useLanguage();
   const { register: registerUser } = useAuth();
+  const { isFeatureEnabled } = usePublicConfigs();
+  const isRegistrationEnabled = isFeatureEnabled(
+    "feature.registration.enabled",
+    true,
+  );
   const router = useRouter();
 
   const [showPassword, setShowPassword] = useState(false);
@@ -135,7 +141,20 @@ export default function RegisterPage() {
         </div>
       )}
 
-      {/* Form */}
+      {/* Registration Disabled Feature Flag Alert */}
+      {!isRegistrationEnabled && (
+        <div className="rounded-2xl border border-amber-500/30 bg-amber-500/10 p-3.5 text-xs text-amber-800 dark:text-amber-300 space-y-1">
+          <div className="font-bold flex items-center gap-1.5">
+            <XCircle className="h-4 w-4 text-amber-500" />
+            <span>Đăng Ký Tài Khoản Đang Tạm Khóa</span>
+          </div>
+          <p className="text-[11px] leading-relaxed text-muted-foreground">
+            Quản trị viên hệ thống đã tạm thời khóa tính năng đăng ký người dùng mới. Vui lòng liên hệ quản trị viên hoặc quay lại sau.
+          </p>
+        </div>
+      )}
+
+      {/* Register Form */}
       <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
         {/* Full Name */}
         <div className="space-y-1.5">
@@ -294,14 +313,16 @@ export default function RegisterPage() {
         {/* Submit Button */}
         <Button
           type="submit"
-          disabled={isSubmitting}
-          className="w-full rounded-2xl bg-emerald-600 hover:bg-emerald-700 text-white font-medium py-2.5 shadow-md shadow-emerald-600/20 transition-all duration-200 cursor-pointer hover:scale-[1.01]"
+          disabled={isSubmitting || !isRegistrationEnabled}
+          className="w-full rounded-2xl bg-emerald-600 hover:bg-emerald-700 text-white font-medium py-2.5 shadow-md shadow-emerald-600/20 transition-all duration-200 cursor-pointer hover:scale-[1.01] disabled:opacity-50 disabled:cursor-not-allowed"
         >
           {isSubmitting ? (
             <>
               <Loader2 className="mr-2 h-4 w-4 animate-spin" />
               {t.auth.register.submitting}
             </>
+          ) : !isRegistrationEnabled ? (
+            "Đăng Ký Đang Tạm Khóa"
           ) : (
             t.auth.register.submit
           )}

src/app/settings/developer/system-configs/page.tsx

+import type { Metadata } from "next";
+import { SystemConfigsManagementView } from "@/components/system-config/system-configs-management-view";
+
+export const metadata: Metadata = {
+  title: "Cấu Hình & Cờ Tính Năng | Nhà Phát Triển",
+  description:
+    "Quản trị tham số hệ thống, cờ tính năng Feature Flags đa tầng và phân quyền truy cập tập trung.",
+};
+
+export default function DeveloperSystemConfigsPage() {
+  return (
+    <div className="space-y-6 animate-in fade-in-50 duration-200">
+      <SystemConfigsManagementView showHeader={false} />
+    </div>
+  );
+}

src/app/system-configs/page.tsx

+import type { Metadata } from "next";
+import { SystemConfigsManagementView } from "@/components/system-config/system-configs-management-view";
+
+export const metadata: Metadata = {
+  title: "Cấu Hình Hệ Thống",
+  description:
+    "Quản trị tham số hệ thống, cờ tính năng Feature Flags đa tầng và phân quyền truy cập tập trung.",
+};
+
+export default function SystemConfigsPage() {
+  return (
+    <div className="min-h-screen bg-background pb-16">
+      <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8 pt-8 space-y-8 animate-in fade-in-50 duration-200">
+        <SystemConfigsManagementView showHeader={true} />
+      </div>
+    </div>
+  );
+}

src/components/developer/developer-shell.tsx

@@ -11,12 +11,14 @@ import {
   Users,
   Shield,
   History,
+  Sliders,
 } from "lucide-react";
 import { useLanguage } from "@/providers/language-provider";
 import { useAuth } from "@/hooks/use-auth";
 import { useApiKeysList, useWebhookConfigsList } from "@/hooks/use-developer";
 import { useUsersList } from "@/hooks/use-users";
 import { useRolesList } from "@/hooks/use-roles";
+import { useSystemConfigsList } from "@/hooks/use-system-config";
 
 interface DeveloperShellProps {
   children: React.ReactNode;
@@ -29,19 +31,29 @@ export function DeveloperShell({ children }: DeveloperShellProps) {
   const canManageUsers = hasPermission("users.read") || role === "ADMIN";
   const canManageRoles = hasPermission("roles.read") || role === "ADMIN";
   const canReadAuditLogs = hasPermission("audit_logs.read") || role === "ADMIN";
+  const canManageConfigs =
+    hasPermission("system_configs.read") || role === "ADMIN";
 
   // Counts for badges
   const { data: apiKeys = [] } = useApiKeysList();
   const { data: webhooks = [] } = useWebhookConfigsList();
   const { data: usersData } = useUsersList({ limit: 1 }, { enabled: canManageUsers });
   const { data: rolesData } = useRolesList({ limit: 1 }, { enabled: canManageRoles });
+  const { data: configsData } = useSystemConfigsList(
+    { limit: 1 },
+    { enabled: canManageConfigs },
+  );
   const totalUsers = usersData?.meta?.total || 0;
   const totalRoles = rolesData?.meta?.total ?? rolesData?.items?.length ?? 0;
+  const totalConfigs = configsData?.total || 0;
 
   const isUsersTab = pathname.startsWith("/settings/developer/users");
   const isRolesTab =
     pathname.startsWith("/settings/developer/roles") ||
     pathname.startsWith("/roles");
+  const isSystemConfigsTab =
+    pathname.startsWith("/settings/developer/system-configs") ||
+    pathname.startsWith("/system-configs");
   const isApiKeysTab =
     pathname === "/settings/developer/api-keys" ||
     pathname === "/settings/developer";
@@ -171,6 +183,26 @@ export function DeveloperShell({ children }: DeveloperShellProps) {
               <span>{t.nav.auditLogs}</span>
             </Link>
           )}
+
+          {/* 6. Tab Cấu Hình Hệ Thống & Feature Flags */}
+          {canManageConfigs && (
+            <Link
+              href="/settings/developer/system-configs"
+              className={`flex items-center gap-2 px-4 py-3 text-xs font-bold border-b-2 transition-all cursor-pointer whitespace-nowrap ${
+                isSystemConfigsTab
+                  ? "border-emerald-500 text-emerald-600 dark:text-emerald-400"
+                  : "border-transparent text-muted-foreground hover:text-foreground"
+              }`}
+            >
+              <Sliders className="h-4 w-4" />
+              <span>{t.developer.tabs.systemConfigs}</span>
+              {totalConfigs > 0 && (
+                <span className="rounded-full bg-emerald-500/10 text-emerald-600 dark:text-emerald-400 text-[10px] px-2 py-0.5 border border-emerald-500/20 font-semibold">
+                  {totalConfigs}
+                </span>
+              )}
+            </Link>
+          )}
         </div>
 
         {/* Tab Page Content */}

src/components/system-config/system-config-card.tsx

+"use client";
+
+import React from "react";
+import {
+  Edit2,
+  Trash2,
+  Globe,
+  Lock,
+  Calendar,
+  ToggleLeft,
+  Sparkles,
+  ShieldAlert,
+  Share2,
+  Sliders,
+} from "lucide-react";
+import { useLanguage } from "@/providers/language-provider";
+import { SystemConfigItem } from "@/types/system-config";
+import { CopyButton } from "@/components/common/copy-button";
+import { formatDate } from "@/lib/utils";
+
+interface SystemConfigCardProps {
+  config: SystemConfigItem;
+  canManage: boolean;
+  onEdit: (config: SystemConfigItem) => void;
+  onDelete: (config: SystemConfigItem) => void;
+  onToggle: (key: string) => Promise<void>;
+  isToggling: boolean;
+}
+
+export function SystemConfigCard({
+  config,
+  canManage,
+  onEdit,
+  onDelete,
+  onToggle,
+  isToggling,
+}: SystemConfigCardProps) {
+  const { t, locale } = useLanguage();
+  const isBoolean = typeof config.value === "boolean";
+  const boolVal = Boolean(config.value);
+
+  const getCategoryBadge = () => {
+    switch (config.category) {
+      case "FEATURE_FLAG":
+        return (
+          <span className="inline-flex items-center gap-1 rounded-full bg-emerald-500/10 px-2.5 py-0.5 text-[10px] font-bold text-emerald-600 dark:text-emerald-400 border border-emerald-500/20">
+            <Sparkles className="h-3 w-3" />
+            {t.systemConfigs.tabs.featureFlag}
+          </span>
+        );
+      case "SECURITY":
+        return (
+          <span className="inline-flex items-center gap-1 rounded-full bg-rose-500/10 px-2.5 py-0.5 text-[10px] font-bold text-rose-600 dark:text-rose-400 border border-rose-500/20">
+            <ShieldAlert className="h-3 w-3" />
+            {t.systemConfigs.tabs.security}
+          </span>
+        );
+      case "INTEGRATION":
+        return (
+          <span className="inline-flex items-center gap-1 rounded-full bg-amber-500/10 px-2.5 py-0.5 text-[10px] font-bold text-amber-600 dark:text-amber-400 border border-amber-500/20">
+            <Share2 className="h-3 w-3" />
+            {t.systemConfigs.tabs.integration}
+          </span>
+        );
+      default:
+        return (
+          <span className="inline-flex items-center gap-1 rounded-full bg-blue-500/10 px-2.5 py-0.5 text-[10px] font-bold text-blue-600 dark:text-blue-400 border border-blue-500/20">
+            <Sliders className="h-3 w-3" />
+            {t.systemConfigs.tabs.general}
+          </span>
+        );
+    }
+  };
+
+  return (
+    <div className="group relative flex flex-col justify-between rounded-3xl border border-emerald-500/15 bg-card/70 p-5 shadow-sm backdrop-blur-sm transition-all duration-300 hover:border-emerald-500/30 hover:shadow-md hover:shadow-emerald-950/10 hover:scale-[1.01]">
+      <div className="space-y-3.5">
+        {/* Top Badges */}
+        <div className="flex items-center justify-between gap-2">
+          {getCategoryBadge()}
+          <span
+            className={`inline-flex items-center gap-1 rounded-full px-2 py-0.5 text-[10px] font-semibold border ${
+              config.isPublic
+                ? "bg-emerald-500/10 text-emerald-600 dark:text-emerald-400 border-emerald-500/20"
+                : "bg-muted/70 text-muted-foreground border-border/80"
+            }`}
+          >
+            {config.isPublic ? (
+              <Globe className="h-2.5 w-2.5" />
+            ) : (
+              <Lock className="h-2.5 w-2.5" />
+            )}
+            <span>
+              {config.isPublic
+                ? t.systemConfigs.publicBadge
+                : t.systemConfigs.privateBadge}
+            </span>
+          </span>
+        </div>
+
+        {/* Key & Copy */}
+        <div className="flex items-start justify-between gap-2">
+          <div className="space-y-0.5">
+            <h3 className="font-mono text-sm font-bold tracking-tight text-foreground break-all">
+              {config.key}
+            </h3>
+            {config.description && (
+              <p className="text-xs text-muted-foreground line-clamp-2 leading-relaxed">
+                {config.description}
+              </p>
+            )}
+          </div>
+          <CopyButton text={config.key} />
+        </div>
+
+        {/* Value Section */}
+        <div className="rounded-2xl border border-border/60 bg-muted/30 p-3">
+          <div className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground mb-1.5">
+            {t.systemConfigs.table.value}
+          </div>
+
+          {isBoolean ? (
+            <div className="flex items-center justify-between">
+              <span
+                className={`text-xs font-bold ${
+                  boolVal
+                    ? "text-emerald-600 dark:text-emerald-400"
+                    : "text-muted-foreground"
+                }`}
+              >
+                {boolVal
+                  ? t.systemConfigs.booleanActive
+                  : t.systemConfigs.booleanInactive}
+              </span>
+              <button
+                type="button"
+                disabled={!canManage || isToggling}
+                onClick={() => onToggle(config.key)}
+                className={`relative inline-flex h-6 w-11 shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none disabled:opacity-50 disabled:cursor-not-allowed ${
+                  boolVal ? "bg-emerald-500" : "bg-muted-foreground/30"
+                }`}
+              >
+                <span
+                  className={`pointer-events-none inline-block h-5 w-5 transform rounded-full bg-white shadow-lg ring-0 transition duration-200 ease-in-out ${
+                    boolVal ? "translate-x-5" : "translate-x-0"
+                  }`}
+                />
+              </button>
+            </div>
+          ) : (
+            <div className="overflow-x-auto max-h-24 font-mono text-xs text-foreground font-medium">
+              {typeof config.value === "object" ? (
+                <pre className="text-[11px] leading-tight">
+                  {JSON.stringify(config.value, null, 2)}
+                </pre>
+              ) : (
+                <span>{String(config.value)}</span>
+              )}
+            </div>
+          )}
+        </div>
+      </div>
+
+      {/* Card Footer: Timestamp & Actions */}
+      <div className="mt-4 pt-3 border-t border-border/60 flex items-center justify-between text-xs text-muted-foreground">
+        <div className="flex items-center gap-1.5 text-[11px]">
+          <Calendar className="h-3 w-3 text-emerald-500" />
+          <span>{formatDate(config.updatedAt, locale)}</span>
+        </div>
+
+        {canManage && (
+          <div className="flex items-center gap-1">
+            <button
+              onClick={() => onEdit(config)}
+              className="flex h-7 w-7 items-center justify-center rounded-xl text-muted-foreground hover:bg-emerald-500/10 hover:text-emerald-600 dark:hover:text-emerald-400 transition-colors cursor-pointer"
+              title={t.systemConfigs.editBtn}
+            >
+              <Edit2 className="h-3.5 w-3.5" />
+            </button>
+            <button
+              onClick={() => onDelete(config)}
+              className="flex h-7 w-7 items-center justify-center rounded-xl text-muted-foreground hover:bg-rose-500/10 hover:text-rose-600 dark:hover:text-rose-400 transition-colors cursor-pointer"
+              title={t.systemConfigs.deleteBtn}
+            >
+              <Trash2 className="h-3.5 w-3.5" />
+            </button>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

src/components/system-config/system-config-delete-dialog.tsx

+"use client";
+
+import React from "react";
+import { AlertTriangle, Loader2 } from "lucide-react";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Button } from "@/components/ui/button";
+import { useLanguage } from "@/providers/language-provider";
+import { SystemConfigItem } from "@/types/system-config";
+
+interface SystemConfigDeleteDialogProps {
+  config: SystemConfigItem | null;
+  isOpen: boolean;
+  onClose: () => void;
+  onConfirm: () => Promise<void>;
+  isDeleting: boolean;
+}
+
+export function SystemConfigDeleteDialog({
+  config,
+  isOpen,
+  onClose,
+  onConfirm,
+  isDeleting,
+}: SystemConfigDeleteDialogProps) {
+  const { t } = useLanguage();
+
+  if (!config) return null;
+
+  return (
+    <Dialog open={isOpen} onOpenChange={(open) => !open && onClose()}>
+      <DialogContent className="sm:max-w-[440px] rounded-3xl border border-rose-500/20 bg-card/95 backdrop-blur-xl p-6 shadow-2xl shadow-rose-950/20">
+        <DialogHeader className="space-y-3">
+          <div className="mx-auto flex h-12 w-12 items-center justify-center rounded-2xl bg-rose-500/10 text-rose-600 dark:text-rose-400 border border-rose-500/20">
+            <AlertTriangle className="h-6 w-6" />
+          </div>
+          <DialogTitle className="text-center text-lg font-bold text-foreground">
+            {t.systemConfigs.deleteDialog.title}
+          </DialogTitle>
+          <DialogDescription className="text-center text-xs text-muted-foreground leading-relaxed">
+            {t.systemConfigs.deleteDialog.description}
+          </DialogDescription>
+        </DialogHeader>
+
+        {/* Config Summary Card */}
+        <div className="my-2 rounded-2xl border border-border/70 bg-muted/40 p-3.5 space-y-1.5">
+          <div className="flex items-center justify-between">
+            <span className="text-xs text-muted-foreground">
+              {t.systemConfigs.table.key}:
+            </span>
+            <code className="text-xs font-bold text-emerald-600 dark:text-emerald-400">
+              {config.key}
+            </code>
+          </div>
+          <div className="flex items-center justify-between">
+            <span className="text-xs text-muted-foreground">
+              {t.systemConfigs.table.category}:
+            </span>
+            <span className="text-xs font-medium text-foreground">
+              {config.category}
+            </span>
+          </div>
+        </div>
+
+        <DialogFooter className="flex flex-col sm:flex-row gap-2 mt-4">
+          <Button
+            variant="outline"
+            onClick={onClose}
+            disabled={isDeleting}
+            className="w-full sm:w-1/2 rounded-2xl border-border/80 text-xs font-semibold hover:bg-muted/70 cursor-pointer"
+          >
+            {t.systemConfigs.deleteDialog.cancelBtn}
+          </Button>
+          <Button
+            variant="destructive"
+            onClick={onConfirm}
+            disabled={isDeleting}
+            className="w-full sm:w-1/2 rounded-2xl bg-rose-600 hover:bg-rose-700 text-white text-xs font-bold shadow-md shadow-rose-600/20 cursor-pointer"
+          >
+            {isDeleting ? (
+              <Loader2 className="h-4 w-4 animate-spin" />
+            ) : (
+              t.systemConfigs.deleteDialog.confirmBtn
+            )}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/hooks/use-system-config.ts

+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { systemConfigService } from "@/services/system-config.service";
+import {
+  CreateSystemConfigDto,
+  SystemConfigQueryParams,
+  UpdateSystemConfigDto,
+} from "@/types/system-config";
+
+export const SYSTEM_CONFIG_QUERY_KEYS = {
+  all: ["system-configs"] as const,
+  public: ["system-configs", "public"] as const,
+  list: (params?: SystemConfigQueryParams) =>
+    ["system-configs", "list", params] as const,
+  detail: (key: string) => ["system-configs", "detail", key] as const,
+};
+
+/**
+ * Hook truy xuất cấu hình công khai và kiểm tra Feature Flags trên toàn client
+ */
+export function usePublicConfigs() {
+  const query = useQuery({
+    queryKey: SYSTEM_CONFIG_QUERY_KEYS.public,
+    queryFn: () => systemConfigService.getPublicConfigs(),
+    staleTime: 60 * 1000, // 1 phút
+    refetchOnWindowFocus: false,
+  });
+
+  const isFeatureEnabled = (
+    featureKey: string,
+    defaultValue: boolean = false,
+  ): boolean => {
+    if (!query.data?.map) return defaultValue;
+    const val = query.data.map[featureKey];
+    if (typeof val === "boolean") return val;
+    if (val === "true" || val === 1 || val === "1") return true;
+    if (val === "false" || val === 0 || val === "0") return false;
+    return Boolean(val);
+  };
+
+  return {
+    ...query,
+    isFeatureEnabled,
+  };
+}
+
+/**
+ * Hook lấy danh sách cấu hình quản trị (Admin)
+ */
+export function useSystemConfigsList(
+  params?: SystemConfigQueryParams,
+  options?: { enabled?: boolean },
+) {
+  return useQuery({
+    queryKey: SYSTEM_CONFIG_QUERY_KEYS.list(params),
+    queryFn: () => systemConfigService.getConfigs(params),
+    enabled: options?.enabled ?? true,
+  });
+}
+
+/**
+ * Hook lấy chi tiết 1 cấu hình theo key
+ */
+export function useSystemConfigItem(
+  key: string,
+  options?: { enabled?: boolean },
+) {
+  return useQuery({
+    queryKey: SYSTEM_CONFIG_QUERY_KEYS.detail(key),
+    queryFn: () => systemConfigService.getConfigByKey(key),
+    enabled: Boolean(key) && (options?.enabled ?? true),
+  });
+}
+
+/**
+ * Hook tạo cấu hình mới
+ */
+export function useCreateSystemConfig() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (dto: CreateSystemConfigDto) =>
+      systemConfigService.createConfig(dto),
+    onSuccess: () => {
+      queryClient.invalidateQueries({
+        queryKey: SYSTEM_CONFIG_QUERY_KEYS.all,
+      });
+    },
+  });
+}
+
+/**
+ * Hook cập nhật cấu hình
+ */
+export function useUpdateSystemConfig() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: ({ key, dto }: { key: string; dto: UpdateSystemConfigDto }) =>
+      systemConfigService.updateConfig(key, dto),
+    onSuccess: () => {
+      queryClient.invalidateQueries({
+        queryKey: SYSTEM_CONFIG_QUERY_KEYS.all,
+      });
+    },
+  });
+}
+
+/**
+ * Hook bật/tắt nhanh boolean Feature Flag
+ */
+export function useToggleFeatureFlag() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (key: string) => systemConfigService.toggleFeature(key),
+    onSuccess: () => {
+      queryClient.invalidateQueries({
+        queryKey: SYSTEM_CONFIG_QUERY_KEYS.all,
+      });
+    },
+  });
+}
+
+/**
+ * Hook xóa cấu hình
+ */
+export function useDeleteSystemConfig() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (key: string) => systemConfigService.deleteConfig(key),
+    onSuccess: () => {
+      queryClient.invalidateQueries({
+        queryKey: SYSTEM_CONFIG_QUERY_KEYS.all,
+      });
+    },
+  });
+}

src/lib/i18n/translations.ts

@@ -16,6 +16,7 @@ export const translations = {
       users: "Quản Lý Người Dùng",
       roles: "Vai Trò & Phân Quyền",
       auditLogs: "Nhật Ký Hệ Thống",
+      systemConfigs: "Cấu Hình Hệ Thống",
       statusActive: "Động cơ Crawler Đang Chạy",
       reload: "Tải lại trang",
       copyright: "Data Crawler © 2026 - Code by @hnihTyoB",
@@ -656,6 +657,7 @@ export const translations = {
         apiKeys: "Khóa API",
         webhooks: "Webhooks",
         docs: "Tích Hợp Nhanh",
+        systemConfigs: "Cấu Hình & Cờ Tính Năng",
       },
       apiKeys: {
         title: "Quản Lý Khóa API",
@@ -1271,6 +1273,80 @@ export const translations = {
         },
       },
     },
+    systemConfigs: {
+      title: "Cấu Hình & Cờ Tính Năng",
+      subtitle: "Quản trị tham số hệ thống, cờ tính năng Feature Flags đa tầng và phân quyền truy cập tập trung",
+      tabs: {
+        all: "Tất cả",
+        general: "Cấu hình chung",
+        featureFlag: "Cờ tính năng",
+        integration: "Tích hợp",
+        security: "Bảo mật",
+      },
+      stats: {
+        total: "Tổng cấu hình",
+        activeFlags: "Cờ đang kích hoạt",
+        publicConfigs: "Cấu hình công khai",
+      },
+      searchPlaceholder: "Tìm theo khóa cấu hình hoặc nội dung mô tả...",
+      createBtn: "Thêm cấu hình",
+      editBtn: "Chỉnh sửa",
+      deleteBtn: "Xóa cấu hình",
+      refreshBtn: "Làm mới",
+      table: {
+        key: "Khóa cấu hình",
+        value: "Giá trị",
+        category: "Phân loại",
+        description: "Mô tả",
+        isPublic: "Quyền truy cập",
+        updatedAt: "Cập nhật lúc",
+        actions: "Thao tác",
+      },
+      booleanActive: "Đang bật (true)",
+      booleanInactive: "Đang tắt (false)",
+      booleanOn: "Bật",
+      booleanOff: "Tắt",
+      modalBoolActive: "Kích hoạt (ON / True)",
+      modalBoolInactive: "Tắt tính năng (OFF / False)",
+      modalBoolHelp: "Cờ tính năng sẽ có giá trị",
+      publicBadge: "Công khai",
+      privateBadge: "Nội bộ",
+      modal: {
+        createTitle: "Thêm Cấu Hình Mới",
+        createDesc: "Thiết lập tham số hoặc cờ tính năng mới vào hệ thống mà không cần build lại máy chủ",
+        editTitle: "Chỉnh Sửa Cấu Hình",
+        editDesc: "Cập nhật giá trị cấu hình, hệ thống sẽ tự động đồng bộ và xóa bộ nhớ đệm tức thời",
+        keyLabel: "Khóa định danh",
+        keyPlaceholder: "Ví dụ: feature.ai.enabled hoặc app.name",
+        typeLabel: "Kiểu dữ liệu",
+        typeBoolean: "Boolean (Cờ bật tắt)",
+        typeString: "Chuỗi văn bản (String)",
+        typeNumber: "Số nguyên hoặc thập phân (Number)",
+        typeJson: "Dữ liệu cấu trúc (JSON)",
+        valueLabel: "Giá trị",
+        valuePlaceholder: "Nhập giá trị...",
+        categoryLabel: "Danh mục",
+        descriptionLabel: "Mô tả ý nghĩa",
+        descriptionPlaceholder: "Giải thích mục đích của cấu hình này cho Quản trị viên...",
+        isPublicLabel: "Cho phép đọc công khai",
+        isPublicDesc: "Cho phép giao diện khách đọc cấu hình này mà không cần đăng nhập",
+        saveBtn: "Lưu cấu hình",
+        cancelBtn: "Hủy bỏ",
+      },
+      deleteDialog: {
+        title: "Xác Nhận Xóa Cấu Hình",
+        description: "Bạn có chắc chắn muốn xóa cấu hình này không? Thao tác này sẽ xóa vĩnh viễn và đồng bộ ngay tới toàn bộ cụm máy chủ.",
+        confirmBtn: "Xóa vĩnh viễn",
+        cancelBtn: "Hủy bỏ",
+      },
+      toast: {
+        createSuccess: "Đã tạo cấu hình thành công",
+        updateSuccess: "Đã cập nhật cấu hình thành công",
+        toggleSuccess: "Đã thay đổi trạng thái cờ tính năng",
+        deleteSuccess: "Đã xóa cấu hình thành công",
+        error: "Đã có lỗi xảy ra, vui lòng thử lại",
+      },
+    },
   },
   en: {
     // Navigation & Common
@@ -1287,6 +1363,7 @@ export const translations = {
       users: "User Management",
       roles: "Roles & Permissions",
       auditLogs: "System Audit Logs",
+      systemConfigs: "System Configurations",
       statusActive: "Crawler Engine Active",
       reload: "Reload page",
       copyright: "Data Crawler © 2026 - Code by @hnihTyoB",
@@ -1926,7 +2003,8 @@ export const translations = {
       tabs: {
         apiKeys: "API Keys",
         webhooks: "Webhooks",
-        docs: "Quick Integration",
+        docs: "Integration Guide",
+        systemConfigs: "Configurations & Flags",
       },
       apiKeys: {
         title: "API Keys Management",
@@ -2542,6 +2620,80 @@ export const translations = {
         },
       },
     },
+    systemConfigs: {
+      title: "Configurations & Flags",
+      subtitle: "Manage operational parameters, centralized Feature Flags, and system access policies",
+      tabs: {
+        all: "All",
+        general: "General",
+        featureFlag: "Feature Flags",
+        integration: "Integration",
+        security: "Security",
+      },
+      stats: {
+        total: "Total Configs",
+        activeFlags: "Active Flags",
+        publicConfigs: "Public Configs",
+      },
+      searchPlaceholder: "Search by key or description...",
+      createBtn: "New Configuration",
+      editBtn: "Edit",
+      deleteBtn: "Delete configuration",
+      refreshBtn: "Refresh",
+      table: {
+        key: "Configuration Key",
+        value: "Current Value",
+        category: "Category",
+        description: "Description",
+        isPublic: "Access Level",
+        updatedAt: "Updated At",
+        actions: "Actions",
+      },
+      booleanActive: "Enabled (true)",
+      booleanInactive: "Disabled (false)",
+      booleanOn: "On",
+      booleanOff: "Off",
+      modalBoolActive: "Enabled (ON / True)",
+      modalBoolInactive: "Disabled (OFF / False)",
+      modalBoolHelp: "Feature flag value will be",
+      publicBadge: "Public",
+      privateBadge: "Internal",
+      modal: {
+        createTitle: "Create Configuration",
+        createDesc: "Add a new parameter or feature flag to the system without rebuilding the server",
+        editTitle: "Edit Configuration",
+        editDesc: "Update configuration value with instant cluster-wide cache invalidation",
+        keyLabel: "Configuration Key",
+        keyPlaceholder: "e.g. feature.ai.enabled or app.name",
+        typeLabel: "Data Type",
+        typeBoolean: "Boolean (Feature Flag)",
+        typeString: "String",
+        typeNumber: "Number",
+        typeJson: "Structured JSON",
+        valueLabel: "Value",
+        valuePlaceholder: "Enter value...",
+        categoryLabel: "Category",
+        descriptionLabel: "Description",
+        descriptionPlaceholder: "Explain the purpose of this config for administrators...",
+        isPublicLabel: "Allow Public Read",
+        isPublicDesc: "Allows frontend clients to read this configuration without authentication",
+        saveBtn: "Save Configuration",
+        cancelBtn: "Cancel",
+      },
+      deleteDialog: {
+        title: "Confirm Delete Configuration",
+        description: "Are you sure you want to delete this configuration? This action is permanent and synchronizes immediately across all cluster instances.",
+        confirmBtn: "Delete Permanently",
+        cancelBtn: "Cancel",
+      },
+      toast: {
+        createSuccess: "Configuration created successfully",
+        updateSuccess: "Configuration updated successfully",
+        toggleSuccess: "Feature flag state toggled successfully",
+        deleteSuccess: "Configuration deleted successfully",
+        error: "An error occurred, please try again",
+      },
+    },
   },
 };
 

src/middleware.ts

@@ -16,9 +16,11 @@ const ADMIN_ROUTES = [
   "/users",
   "/audit-logs",
   "/roles",
+  "/system-configs",
   "/settings/developer/users",
   "/settings/developer/roles",
   "/settings/developer/audit-logs",
+  "/settings/developer/system-configs",
 ];
 
 // Open public pages that do NOT require login (e.g. 403 forbidden, 404 not-found)

src/services/system-config.service.ts

+import { apiClient } from "@/lib/api-client";
+import {
+  CreateSystemConfigDto,
+  PublicConfigsResponse,
+  SystemConfigItem,
+  SystemConfigQueryParams,
+  SystemConfigsListResponse,
+  UpdateSystemConfigDto,
+} from "@/types/system-config";
+
+export const systemConfigService = {
+  /**
+   * Lấy danh sách cấu hình công khai và Feature Flags cho client/guest
+   * GET /api/proxy/system/public
+   */
+  async getPublicConfigs(): Promise<PublicConfigsResponse> {
+    const response = await apiClient.get<{
+      success: boolean;
+      data: PublicConfigsResponse;
+    }>("/system/public");
+    return response.data.data;
+  },
+
+  /**
+   * Lấy danh sách cấu hình hệ thống (Admin)
+   * GET /api/proxy/system/configs
+   */
+  async getConfigs(
+    params?: SystemConfigQueryParams,
+  ): Promise<SystemConfigsListResponse> {
+    const response = await apiClient.get<{
+      success: boolean;
+      data: SystemConfigsListResponse;
+    }>("/system/configs", { params });
+    return response.data.data;
+  },
+
+  /**
+   * Lấy chi tiết một cấu hình theo khóa
+   * GET /api/proxy/system/configs/:key
+   */
+  async getConfigByKey(key: string): Promise<SystemConfigItem> {
+    const response = await apiClient.get<{
+      success: boolean;
+      data: SystemConfigItem;
+    }>(`/system/configs/${encodeURIComponent(key)}`);
+    return response.data.data;
+  },
+
+  /**
+   * Tạo cấu hình mới
+   * POST /api/proxy/system/configs
+   */
+  async createConfig(dto: CreateSystemConfigDto): Promise<SystemConfigItem> {
+    const response = await apiClient.post<{
+      success: boolean;
+      data: SystemConfigItem;
+      message?: string;
+    }>("/system/configs", dto);
+    return response.data.data;
+  },
+
+  /**
+   * Cập nhật cấu hình
+   * PUT /api/proxy/system/configs/:key
+   */
+  async updateConfig(
+    key: string,
+    dto: UpdateSystemConfigDto,
+  ): Promise<SystemConfigItem> {
+    const response = await apiClient.put<{
+      success: boolean;
+      data: SystemConfigItem;
+      message?: string;
+    }>(`/system/configs/${encodeURIComponent(key)}`, dto);
+    return response.data.data;
+  },
+
+  /**
+   * Bật/tắt nhanh boolean Feature Flag
+   * PATCH /api/proxy/system/features/:key/toggle
+   */
+  async toggleFeature(key: string): Promise<SystemConfigItem> {
+    const response = await apiClient.patch<{
+      success: boolean;
+      data: SystemConfigItem;
+      message?: string;
+    }>(`/system/features/${encodeURIComponent(key)}/toggle`);
+    return response.data.data;
+  },
+
+  /**
+   * Xóa cấu hình
+   * DELETE /api/proxy/system/configs/:key
+   */
+  async deleteConfig(key: string): Promise<void> {
+    await apiClient.delete(`/system/configs/${encodeURIComponent(key)}`);
+  },
+};

src/types/system-config.ts

+export type SystemConfigCategory =
+  | "GENERAL"
+  | "FEATURE_FLAG"
+  | "INTEGRATION"
+  | "SECURITY";
+
+export interface SystemConfigItem {
+  id: string;
+  key: string;
+  value: unknown;
+  description: string | null;
+  category: SystemConfigCategory;
+  isPublic: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface PublicConfigsResponse {
+  configs: Array<{
+    key: string;
+    value: unknown;
+    category: string;
+    description: string | null;
+  }>;
+  map: Record<string, unknown>;
+}
+
+export interface CreateSystemConfigDto {
+  key: string;
+  value: unknown;
+  description?: string;
+  category?: SystemConfigCategory;
+  isPublic?: boolean;
+}
+
+export interface UpdateSystemConfigDto {
+  value?: unknown;
+  description?: string;
+  category?: SystemConfigCategory;
+  isPublic?: boolean;
+}
+
+export interface SystemConfigQueryParams {
+  category?: SystemConfigCategory;
+  search?: string;
+  isPublic?: boolean | "true" | "false";
+  page?: number;
+  limit?: number;
+}
+
+export interface SystemConfigsListResponse {
+  items: SystemConfigItem[];
+  total: number;
+  page: number;
+  limit: number;
+}