fix: menu item/category create, demo banner reach, token refresh, blog publish

Dashboard & API bug fixes for owner-reported breakage:

- MenuController validators (PosValidators): NameEn was required but the
  dashboard sends null when blank, so every manual menu-item create failed
  and category create failed 100% (the form never sends nameEn). Now optional.
- DemoDataBanner: only showed when a cafe was exactly empty, so
  showcase-seeded cafes (2-3 cats / 3-5 items) could never trigger the
  one-click seed. Widened gate to sparse menus (<5 cats && <10 items) and
  added a clear "nothing to add" message when already populated.
- client.ts: added one-time JWT refresh-and-retry on 401 (shared in-flight
  promise) before bouncing to /login. Expired access tokens silently broke
  ticket list, add-table, and other reads.
- Surface API errors as toasts on menu + table mutations (were swallowed
  silently, so failures looked like "nothing happens").
- Admin blog editor: saving an edit dropped IsPublished (defaulted false,
  silently unpublishing the post on every save); now persisted with a
  toggle. Also hoisted the inner Field component to module scope - it was
  remounting every input on each keystroke and dropping focus.
- Admin integrations: replaced raw radio gateway selector with a styled
  RadioDot matching the iOS toggles.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/dashboard/src/components/menu/menu-admin-screen.tsx

@@ -12,7 +12,8 @@ import { CategoryVisual } from "@/components/menu/category-visual";
 import { CategoryMediaFields } from "@/components/menu/category-media-fields";
 import type { CategoryIconSelection } from "@/components/menu/category-preset-picker";
 import { DEFAULT_CATEGORY_ICON_STYLE } from "@/lib/category-icon-presets";
-import { apiGet, apiPatch, apiPost } from "@/lib/api/client";
+import { ApiClientError, apiGet, apiPatch, apiPost } from "@/lib/api/client";
+import { notify } from "@/lib/notify";
 import { useAuthStore } from "@/lib/stores/auth.store";
 import { useBranchStore } from "@/lib/stores/branch.store";
 import { formatCurrency, formatNumber } from "@/lib/format";
@@ -183,6 +184,11 @@ function Modal({
 export function MenuAdminScreen() {
   const t = useTranslations("menuAdmin");
   const tCommon = useTranslations("common");
+  const tNotify = useTranslations("notify");
+  const showError = (err: unknown) =>
+    notify.error(
+      err instanceof ApiClientError ? err.message : tNotify("errorGeneric")
+    );
   const isRtl = useIsRtl();
   const locale = useLocale();
   const numberLocale = locale === "en" ? "en-US" : "fa-IR";
@@ -267,6 +273,7 @@ export function MenuAdminScreen() {
       setItemModalOpen(false);
       invalidateMenu();
     },
+    onError: showError,
   });
 
   const updateItemMutation = useMutation({
@@ -284,12 +291,14 @@ export function MenuAdminScreen() {
       setItemModalOpen(false);
       invalidateMenu();
     },
+    onError: showError,
   });
 
   const toggleItemMutation = useMutation({
     mutationFn: ({ id, isAvailable }: { id: string; isAvailable: boolean }) =>
       apiPatch(`/api/cafes/${cafeId}/menu/items/${id}/availability`, { isAvailable }),
     onSuccess: invalidateMenu,
+    onError: showError,
   });
 
   const addCategoryMutation = useMutation({
@@ -307,6 +316,7 @@ export function MenuAdminScreen() {
       setCatModalOpen(false);
       invalidateMenu();
     },
+    onError: showError,
   });
 
   const updateCategoryMutation = useMutation({
@@ -322,6 +332,7 @@ export function MenuAdminScreen() {
       setCatModalOpen(false);
       invalidateMenu();
     },
+    onError: showError,
   });
 
   // ── Modal openers ──────────────────────────────────────────────────────────
@@ -451,7 +462,7 @@ export function MenuAdminScreen() {
       ) : (
         /* ── Catalog tab ─────────────────────────────────────────────────── */
         <div className="flex min-h-0 flex-col gap-4">
-          {categories.length === 0 && items.length === 0 && (
+          {categories.length < 5 && items.length < 10 && (
             <DemoDataBanner
               invalidateKeys={[
                 ["menu-categories", cafeId],