feat: add reusable UI primitives for admin and public site

Admin (ui.tsx): AdminInput, AdminSelect, AdminTextarea, AdminButton,
AdminModal + adminStyles token object for consistent styling.

Public (ModalBase.tsx): Shared modal with overlay, backdrop blur, focus
trap, ESC handling, and portal rendering.

Public (TabButton.tsx): Unified active/inactive tab with gold styling.

src/app/admin/_components/ui.tsx

@@ -0,0 +1,203 @@
+/**
+ * Admin UI Primitives
+ *
+ * Single source of truth for admin panel styling.
+ * Every input, select, button, badge, card, and modal in /admin should use these.
+ */
+
+import { type ComponentPropsWithoutRef, forwardRef } from "react";
+import { X } from "lucide-react";
+import { useFocusTrap } from "@/hooks/useFocusTrap";
+
+/* ============================== */
+/*           Style tokens         */
+/* ============================== */
+
+export const adminStyles = {
+  /** Standard input — full width, rounded-lg */
+  input:
+    "w-full rounded-lg border border-neutral-200 bg-neutral-100 px-4 py-2.5 text-neutral-900 placeholder-neutral-400 outline-none hover:border-gold/30 focus:border-gold transition-colors dark:border-white/10 dark:bg-neutral-800 dark:text-white dark:placeholder-neutral-500",
+
+  /** Compact input — smaller padding, text-sm */
+  inputSm:
+    "rounded-md border border-neutral-200 bg-neutral-100 px-2.5 py-1.5 text-sm text-neutral-900 placeholder-neutral-400 outline-none hover:border-gold/30 focus:border-gold transition-colors dark:border-white/10 dark:bg-neutral-800 dark:text-white dark:placeholder-neutral-600",
+
+  /** Dashed input — for "add new" fields */
+  inputDashed:
+    "flex-1 rounded-lg border border-dashed border-neutral-200 bg-neutral-100/50 px-4 py-2 text-sm text-neutral-900 placeholder-neutral-400 outline-none hover:border-gold/30 hover:placeholder-neutral-500 focus:border-gold/50 transition-colors dark:border-white/10 dark:bg-neutral-800/50 dark:text-white dark:placeholder-neutral-600",
+
+  /** Textarea — same as input + resize-none */
+  textarea:
+    "w-full rounded-lg border border-neutral-200 bg-neutral-100 px-4 py-2.5 text-neutral-900 placeholder-neutral-400 outline-none hover:border-gold/30 focus:border-gold transition-colors resize-none dark:border-white/10 dark:bg-neutral-800 dark:text-white dark:placeholder-neutral-500",
+
+  /** Native select */
+  select:
+    "w-full rounded-lg border border-neutral-200 bg-neutral-100 px-3 py-2 text-sm text-neutral-900 outline-none focus:border-gold/40 transition-colors [color-scheme:light] dark:border-white/10 dark:bg-neutral-800 dark:text-white dark:[color-scheme:dark]",
+
+  /** Select option */
+  option: "bg-white dark:bg-neutral-900",
+
+  /** Primary button — gold solid */
+  btnPrimary:
+    "inline-flex items-center justify-center gap-2 rounded-lg bg-gold px-4 py-2.5 text-sm font-medium text-black transition-all hover:bg-gold-light hover:opacity-90 disabled:opacity-50 disabled:cursor-not-allowed",
+
+  /** Secondary button — outline */
+  btnSecondary:
+    "inline-flex items-center justify-center gap-2 rounded-lg border border-neutral-200 bg-neutral-100 px-4 py-2.5 text-sm font-medium text-neutral-700 transition-colors hover:bg-neutral-200 dark:border-white/10 dark:bg-neutral-800 dark:text-neutral-300 dark:hover:bg-neutral-700",
+
+  /** Small gold accent button */
+  btnGoldSm:
+    "rounded-md bg-gold/20 border border-gold/30 px-3 py-1 text-xs font-medium text-amber-700 hover:bg-gold/30 transition-colors disabled:opacity-30 disabled:cursor-not-allowed dark:text-gold",
+
+  /** Cancel/muted small button */
+  btnCancelSm:
+    "rounded-md border border-neutral-200 px-3 py-1 text-xs text-neutral-500 hover:text-neutral-900 hover:border-neutral-300 transition-colors dark:border-white/10 dark:text-neutral-400 dark:hover:text-white dark:hover:border-white/25",
+
+  /** Danger button */
+  btnDanger:
+    "inline-flex items-center justify-center gap-2 rounded-lg bg-red-600 px-4 py-2.5 text-sm font-medium text-white transition-colors hover:bg-red-500",
+
+  /** Card container */
+  card:
+    "rounded-xl border border-neutral-200 bg-white p-5 dark:border-white/10 dark:bg-neutral-900",
+
+  /** Modal overlay */
+  modalOverlay:
+    "fixed inset-0 z-50 flex items-center justify-center p-4",
+
+  /** Modal backdrop */
+  modalBackdrop:
+    "absolute inset-0 bg-black/70 backdrop-blur-sm",
+
+  /** Modal content */
+  modalContent:
+    "relative w-full rounded-2xl border border-neutral-200 bg-white p-6 shadow-2xl dark:border-white/[0.08] dark:bg-[#0a0a0a]",
+
+  /** Modal close button */
+  modalClose:
+    "absolute right-3 top-3 flex h-8 w-8 items-center justify-center rounded-full text-neutral-500 hover:bg-neutral-100 hover:text-neutral-900 transition-colors cursor-pointer dark:hover:bg-white/[0.06] dark:hover:text-white",
+
+  /** Label */
+  label:
+    "block text-xs font-medium uppercase tracking-wider text-neutral-500 dark:text-neutral-400",
+
+  /** Section heading in admin */
+  sectionTitle:
+    "text-lg font-bold text-neutral-900 dark:text-white",
+
+  /** Dashed add-item button */
+  addButton:
+    "flex items-center gap-2 rounded-lg border border-dashed border-neutral-300 px-4 py-2.5 text-sm text-neutral-500 hover:text-neutral-900 hover:border-neutral-400 transition-colors dark:border-white/20 dark:text-neutral-400 dark:hover:text-white dark:hover:border-white/40",
+} as const;
+
+/* ============================== */
+/*         Input components       */
+/* ============================== */
+
+interface AdminInputProps extends ComponentPropsWithoutRef<"input"> {
+  variant?: "default" | "sm" | "dashed";
+}
+
+export const AdminInput = forwardRef<HTMLInputElement, AdminInputProps>(
+  function AdminInput({ variant = "default", className = "", ...props }, ref) {
+    const base =
+      variant === "sm" ? adminStyles.inputSm
+      : variant === "dashed" ? adminStyles.inputDashed
+      : adminStyles.input;
+    return <input ref={ref} className={`${base} ${className}`} {...props} />;
+  },
+);
+
+interface AdminTextareaProps extends ComponentPropsWithoutRef<"textarea"> {
+  autoResize?: boolean;
+}
+
+export const AdminTextarea = forwardRef<HTMLTextAreaElement, AdminTextareaProps>(
+  function AdminTextarea({ autoResize, className = "", ...props }, ref) {
+    function handleInput(e: React.FormEvent<HTMLTextAreaElement>) {
+      if (autoResize) {
+        const el = e.currentTarget;
+        el.style.height = "auto";
+        el.style.height = el.scrollHeight + "px";
+      }
+    }
+    return (
+      <textarea
+        ref={ref}
+        className={`${adminStyles.textarea} ${className}`}
+        {...props}
+        {...(autoResize ? { onInput: handleInput } : {})}
+      />
+    );
+  },
+);
+
+interface AdminSelectProps extends ComponentPropsWithoutRef<"select"> {
+  children: React.ReactNode;
+}
+
+export const AdminSelect = forwardRef<HTMLSelectElement, AdminSelectProps>(
+  function AdminSelect({ className = "", children, ...props }, ref) {
+    return (
+      <select ref={ref} className={`${adminStyles.select} ${className}`} {...props}>
+        {children}
+      </select>
+    );
+  },
+);
+
+/* ============================== */
+/*        Button components       */
+/* ============================== */
+
+interface AdminButtonProps extends ComponentPropsWithoutRef<"button"> {
+  variant?: "primary" | "secondary" | "danger" | "goldSm" | "cancelSm";
+}
+
+export function AdminButton({ variant = "primary", className = "", ...props }: AdminButtonProps) {
+  const base =
+    variant === "secondary" ? adminStyles.btnSecondary
+    : variant === "danger" ? adminStyles.btnDanger
+    : variant === "goldSm" ? adminStyles.btnGoldSm
+    : variant === "cancelSm" ? adminStyles.btnCancelSm
+    : adminStyles.btnPrimary;
+  return <button className={`${base} ${className}`} {...props} />;
+}
+
+/* ============================== */
+/*        Modal component         */
+/* ============================== */
+
+interface AdminModalProps {
+  open: boolean;
+  onClose: () => void;
+  title?: string;
+  maxWidth?: string;
+  children: React.ReactNode;
+}
+
+export function AdminModal({ open, onClose, title, maxWidth = "max-w-sm", children }: AdminModalProps) {
+  const focusTrapRef = useFocusTrap<HTMLDivElement>(open);
+
+  if (!open) return null;
+
+  return (
+    <div className={adminStyles.modalOverlay} onClick={onClose}>
+      <div className={adminStyles.modalBackdrop} />
+      <div
+        ref={focusTrapRef}
+        className={`${adminStyles.modalContent} ${maxWidth}`}
+        onClick={(e) => e.stopPropagation()}
+        role="dialog"
+        aria-modal="true"
+        aria-label={title}
+      >
+        <button onClick={onClose} className={adminStyles.modalClose} aria-label="Закрыть">
+          <X size={16} />
+        </button>
+        {title && <h3 className="text-sm font-bold text-neutral-900 dark:text-white mb-4">{title}</h3>}
+        {children}
+      </div>
+    </div>
+  );
+}

src/components/ui/ModalBase.tsx

@@ -0,0 +1,64 @@
+"use client";
+
+import { useEffect } from "react";
+import { createPortal } from "react-dom";
+import { X } from "lucide-react";
+import { useFocusTrap } from "@/hooks/useFocusTrap";
+
+interface ModalBaseProps {
+  open: boolean;
+  onClose: () => void;
+  ariaLabel: string;
+  maxWidth?: string;
+  children: React.ReactNode;
+  /** Hide the default close button (e.g. when content has its own) */
+  hideClose?: boolean;
+}
+
+export function ModalBase({ open, onClose, ariaLabel, maxWidth = "max-w-md", children, hideClose }: ModalBaseProps) {
+  const focusTrapRef = useFocusTrap<HTMLDivElement>(open);
+
+  useEffect(() => {
+    if (!open) return;
+    document.body.style.overflow = "hidden";
+    function handleKey(e: KeyboardEvent) {
+      if (e.key === "Escape") onClose();
+    }
+    document.addEventListener("keydown", handleKey);
+    return () => {
+      document.body.style.overflow = "";
+      document.removeEventListener("keydown", handleKey);
+    };
+  }, [open, onClose]);
+
+  if (!open) return null;
+
+  return createPortal(
+    <div
+      className="modal-overlay fixed inset-0 z-[60] flex items-center justify-center p-4"
+      role="dialog"
+      aria-modal="true"
+      aria-label={ariaLabel}
+      onClick={onClose}
+    >
+      <div className="absolute inset-0 bg-black/70 backdrop-blur-sm" />
+      <div
+        ref={focusTrapRef}
+        className={`modal-content relative w-full ${maxWidth} rounded-2xl border border-neutral-200 bg-white dark:border-white/[0.08] dark:bg-neutral-950 p-6 sm:p-8 shadow-2xl`}
+        onClick={(e) => e.stopPropagation()}
+      >
+        {!hideClose && (
+          <button
+            onClick={onClose}
+            aria-label="Закрыть"
+            className="absolute right-4 top-4 flex h-11 w-11 items-center justify-center rounded-full text-neutral-500 dark:text-neutral-400 transition-colors hover:bg-neutral-100 hover:text-neutral-900 dark:hover:bg-white/[0.06] dark:hover:text-white cursor-pointer"
+          >
+            <X size={18} />
+          </button>
+        )}
+        {children}
+      </div>
+    </div>,
+    document.body,
+  );
+}

src/components/ui/TabButton.tsx

@@ -0,0 +1,26 @@
+"use client";
+
+interface TabButtonProps {
+  active: boolean;
+  onClick: () => void;
+  children: React.ReactNode;
+  className?: string;
+}
+
+const activeClass = "bg-gold text-black shadow-[0_0_20px_rgba(201,169,110,0.3)]";
+const inactiveClass =
+  "border border-neutral-300 text-neutral-600 hover:border-neutral-400 hover:text-neutral-800 dark:border-white/10 dark:text-neutral-400 dark:hover:text-white dark:hover:border-white/20";
+
+export function TabButton({ active, onClick, children, className = "" }: TabButtonProps) {
+  return (
+    <button
+      onClick={onClick}
+      aria-pressed={active}
+      className={`inline-flex items-center gap-2 rounded-full px-5 py-2.5 text-sm font-medium transition-all duration-300 cursor-pointer ${
+        active ? activeClass : inactiveClass
+      } ${className}`}
+    >
+      {children}
+    </button>
+  );
+}