feat(admin): category SEO fields, Templates admin, safe project PATCH

- categories/tags admin forms: add meta title/description/keywords, bot-follow,
  sort, is_active (backend already supported these)
- new Templates admin (/admin/templates): container CRUD with description,
  keywords, publishing, premium, primary mode, category/tag assignment, plus
  editable per-variant aspect & resolution
- content-svc: PATCH /v1/projects/{id} partial update so aspect/resolution edits
  never wipe render/colour data (SharedColorsSvg, RenderAepComp, Folder)
- admin resource proxy: add PATCH passthrough

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

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

@@ -17,6 +17,7 @@ export default async function AdminLayout({
   const t = await getTranslations("auto.appAdminLayout");
   const links: { href: string; label: string }[] = [
     { href: "/admin/categories", label: t("categories") },
+    { href: "/admin/templates", label: t("templates") },
     { href: "/admin/tags", label: t("tags") },
     { href: "/admin/fonts", label: t("fonts") },
     { href: "/admin/blogs", label: t("blogs") },