feat(admin): affiliate/personal discounts, user-videos, internal routes, authz

Closes the remaining legacy-admin gaps:
- Users «مدیریت» modal: create personal discount or affiliate code (owner_user_id +
  owner_profit_percentage on existing /v1/discounts), and view the user's saved
  projects ("videos") via new admin GET /v1/saved-projects/by-user/{id} (studio)
- Internal routes admin (/admin/routes): CRUD on content.internal_routes
  (RoutesController + CmsService + gateway /v1/routes/*)
- Security: lock identity UsersController Search + Ban to [Authorize(Roles="Admin")]

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

src/app/[locale]/admin/layout.tsx

@@ -26,6 +26,7 @@ export default async function AdminLayout({
     { href: "/admin/blogs", label: t("blogs") },
     { href: "/admin/slides", label: t("slides") },
     { href: "/admin/home-events", label: t("homeEvents") },
+    { href: "/admin/routes", label: t("routes") },
     { href: "/admin/comments", label: t("comments") },
     { href: "/admin/files", label: t("media") },
     { href: "/admin/ai", label: t("aiContent") },

src/app/[locale]/admin/routes/page.tsx

@@ -0,0 +1,8 @@
+"use client";
+
+import { AdminResource } from "@/components/admin/AdminResource";
+import { routesConfig } from "@/components/admin/admin-resources";
+
+export default function Page() {
+  return <AdminResource config={routesConfig} />;
+}