feat: FAQ pages — Q&A builder in admin, accordion view for users

Admin editor:
- page_type selector: "Страница" / "FAQ" radio buttons
- When FAQ: FaqBuilder component replaces TipTap editor
  - Question input + answer textarea per Q&A item
  - Add/remove items, up/down reorder buttons
  - Per-locale Q&A (stored as JSON array in content JSONB)
- "Создать FAQ" button in list alongside "Создать страницу"
- Filter tabs: Все / Страницы / FAQ
- Page type badge on each row (accent for pages, amber for FAQ)

Public view (InfoPageView):
- Auto-detects page_type='faq' and renders FaqView component
- Accordion with smooth height animation (300ms ease-in-out)
- Search filter appears when >3 questions
- DOMPurify sanitization on FAQ answers
- Single-item expand (click to open/close)

i18n: full FAQ keys for all 4 locales (questions, answers,
search, counts, empty states, builder labels)

src/api/infoPages.ts

@@ -1,10 +1,13 @@
 import apiClient from './client';
 
+export type InfoPageType = 'page' | 'faq';
+
 export interface InfoPage {
   id: number;
   slug: string;
   title: Record<string, string>;
   content: Record<string, string>;
+  page_type: InfoPageType;
   is_active: boolean;
   sort_order: number;
   icon: string | null;
@@ -16,6 +19,7 @@ export interface InfoPageListItem {
   id: number;
   slug: string;
   title: Record<string, string>;
+  page_type: InfoPageType;
   is_active: boolean;
   sort_order: number;
   icon: string | null;
@@ -26,6 +30,7 @@ export interface InfoPageCreateRequest {
   slug: string;
   title: Record<string, string>;
   content: Record<string, string>;
+  page_type: InfoPageType;
   is_active: boolean;
   sort_order: number;
   icon: string | null;
@@ -35,19 +40,27 @@ export interface InfoPageUpdateRequest {
   slug?: string;
   title?: Record<string, string>;
   content?: Record<string, string>;
+  page_type?: InfoPageType;
   is_active?: boolean;
   sort_order?: number;
   icon?: string | null;
 }
 
+/** Single FAQ Q&A item stored in content JSONB. */
+export interface FaqItem {
+  q: string;
+  a: string;
+}
+
 export interface InfoPageReorderRequest {
   items: Array<{ id: number; sort_order: number }>;
 }
 
 export const infoPagesApi = {
   // Public endpoints
-  getPages: async (): Promise<InfoPageListItem[]> => {
-    const response = await apiClient.get<InfoPageListItem[]>('/cabinet/info-pages');
+  getPages: async (pageType?: InfoPageType): Promise<InfoPageListItem[]> => {
+    const params = pageType ? { page_type: pageType } : undefined;
+    const response = await apiClient.get<InfoPageListItem[]>('/cabinet/info-pages', { params });
     return response.data;
   },
 
@@ -59,8 +72,11 @@ export const infoPagesApi = {
   },
 
   // Admin endpoints
-  getAdminPages: async (): Promise<InfoPageListItem[]> => {
-    const response = await apiClient.get<InfoPageListItem[]>('/cabinet/admin/info-pages');
+  getAdminPages: async (pageType?: InfoPageType): Promise<InfoPageListItem[]> => {
+    const params = pageType ? { page_type: pageType } : undefined;
+    const response = await apiClient.get<InfoPageListItem[]>('/cabinet/admin/info-pages', {
+      params,
+    });
     return response.data;
   },