feat(home): admin-managed homepage section manager (toggle/reorder/edit)

The homepage is now driven by a `home_layout` Website Setting (jsonb) instead of a
hardcoded section stack — zero backend changes, no migration.

- lib/home-layout.ts: section catalog + saved-layout merge + locale-aware config
  reader (`<field>_fa`/`<field>_en`) + public fetchHomeLayout() (falls back to
  defaults when unset/unreachable).
- app/[locale]/page.tsx: renders ordered, enabled sections from the layout, passing
  per-section content overrides.
- sections (Hero/Products/Templates/HowItWorks/Pricing/Testimonials/FAQ): accept an
  optional `config` prop overriding heading/subtitle/CTA, locale-aware, default-safe.
- new HomeSlides + HomeEvents sections render the previously-orphaned admin Slides
  (/v1/slides) and Home Events (/v1/home-events) data.
- admin: HomeSectionsManager (toggle on/off, ↑/↓ reorder, per-section FA/EN content
  editor) at /admin/home, saved via the existing /v1/settings upsert; nav item + i18n.

Verified: a saved layout overrides Hero/Pricing headings and reorders sections;
removing it reverts to the default homepage.

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

src/components/sections/Testimonials.tsx

@@ -1,20 +1,23 @@
 "use client";
 
-import { useTranslations } from "next-intl";
+import { useLocale, useTranslations } from "next-intl";
 
 import { cn } from "@/lib/utils";
+import { cfgVal } from "@/lib/home-layout";
 
 import { SectionReveal } from "./SectionReveal";
 import { TestimonialCard } from "./TestimonialCard";
 
 export interface TestimonialsProps {
   className?: string;
+  config?: Record<string, string>;
 }
 
 const TESTIMONIAL_INDICES = [0, 1, 2, 3, 4, 5] as const;
 
-export function Testimonials({ className }: TestimonialsProps) {
+export function Testimonials({ className, config }: TestimonialsProps) {
   const t = useTranslations("testimonials");
+  const locale = useLocale();
 
   const testimonials = TESTIMONIAL_INDICES.map((i) => ({
     id: `item${i}`,
@@ -30,7 +33,7 @@ export function Testimonials({ className }: TestimonialsProps) {
       <div className="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
         <SectionReveal>
           <h2 className="text-center font-heading text-3xl font-bold tracking-tight text-neutral-900 sm:text-4xl">
-            {t("heading")}
+            {cfgVal(config, "heading", locale) ?? t("heading")}
           </h2>
         </SectionReveal>