feat: admin API integration, LogoMark, settings page, i18n, RTL font, docs

- Wire admin API into homepage + templates page (ISR 60s, null fallback)
- Add src/lib/admin-api.ts with safeFetch helper
- Add adminProjectToTemplateItem + adminProjectToCatalogTemplate mappers
- Add LogoMark SVG component, replace Sparkles icon in Navbar/Footer/Sidebar
- Add public/favicon.svg (SVG brand mark)
- Rewrite opengraph-image.tsx with FlatRender branding
- Add RTL/Persian font cascade: unlayered [dir=rtl] block forces Vazirmatn
- Dashboard Settings page: Profile, Security, Billing, Notifications sections
- Add src/lib/supabase/client.ts browser client
- Admin API: GET /me, PATCH /profile, POST /change-password endpoints
- Admin API DTOs: AdminUserDto, UpdateProfileRequest, ChangePasswordRequest
- Admin UI Settings page with TanStack Query + mutations
- Add CLAUDE.md + README.md to both repos for new-machine onboarding
- Update PROJECT_MEMORY.md with session log
- Add appsettings.Development.json.example template

src/components/dashboard/DashboardSidebar.tsx

@@ -1,6 +1,6 @@
 import Link from "next/link";
 import { Suspense } from "react";
-import { Sparkles } from "lucide-react";
+import { LogoMark } from "@/components/ui/LogoMark";
 
 import {
   DashboardPlanBadge,
@@ -40,9 +40,7 @@ export function DashboardSidebar({
           href="/"
           className="flex items-center gap-2 rounded-lg focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary-600 focus-visible:ring-offset-2"
         >
-          <span className="flex h-9 w-9 items-center justify-center rounded-lg bg-primary-600 text-white">
-            <Sparkles className="h-5 w-5" aria-hidden />
-          </span>
+          <LogoMark size={36} />
           <span className="font-heading text-lg font-bold text-neutral-900">
             FlatRender
           </span>