ADDED - Admin SEO page, robots/sitemap hardening and media/maintenance security fixes

SEO
- New Settings > SEO admin page (seo_settings in app_config): indexing switch,
  Google/Bing verification, X handle, JSON-LD identity (Person/Organization,
  sameAs), per-locale keywords, readiness checklist and open links for
  sitemap.xml / robots.txt / manifest.
- robots.txt is now dynamic: disallows admin, api, success and coming-soon
  paths; blocks everything while indexing is off or maintenance is on.
- sitemap.xml carries hreflang alternates per URL, lists only categories with
  published projects, and is empty while hidden.
- Metadata: robots + verification meta, og:locale in de_DE/en_US/ar_AR form,
  alternateLocale, twitter site/creator, project cover as OG image with
  article type, noindex on /success and /coming-soon.
- JSON-LD: WebSite + publisher graph on all public pages, CreativeWork per
  project (view-mode independent).

Security
- Maintenance bypass now requires a correctly signed admin cookie; the
  middleware previously only checked the cookie existed. Token helpers moved
  to lib/admin-session-token.ts (shared by proxy.ts and lib/admin-auth.ts).
- Media uploads: magic-byte validation against the declared type, SVG
  sanitization (script/handlers/foreignObject/javascript: rejected), upload
  folder sanitized, kind inferred from the real file.
- Media route: fixed prefix-based path check that accepted sibling
  directories, unknown extensions return 404, nosniff header, CSP sandbox on
  SVG, gif content type added.
- External media URLs: protocol-relative (//host) URLs rejected.

Portfolio
- Project and category slugs share /portfolio/[slug]; saving now rejects a
  slug already used on the other side instead of silently shadowing it.

Tooling/docs
- Lint: ignore scripts/legacy-prisma-seed.cjs, drop unused import.
- New docs/SEO.md; FEATURES, ARCHITECTURE (Drizzle instead of Prisma), admin
  spec and CLAUDE.md updated.
- Tests for all of the above (unit + integration); suite green.

app/robots.ts

@@ -1,15 +1,49 @@
 import type { MetadataRoute } from "next";
+import { unstable_noStore as noStore } from "next/cache";
 
-export default function robots(): MetadataRoute.Robots {
-  const siteUrl = new URL(process.env.NEXT_PUBLIC_SITE_URL ?? "https://mohfarawati.de");
+import { getMaintenanceMode, getSeoSettings } from "@/lib/app-config";
+import { INTERNAL_ADMIN_PREFIX } from "@/lib/admin-routing";
+import { getSiteUrl } from "@/lib/metadata";
+
+export const dynamic = "force-dynamic";
+
+/** Paths that must never be crawled even when indexing is enabled. */
+export const ROBOTS_DISALLOWED_PATHS = [
+  INTERNAL_ADMIN_PREFIX,
+  "/root",
+  "/api/",
+  "/success",
+  "/coming-soon",
+  "/*/success",
+  "/*/coming-soon",
+];
+
+export function buildRobots(input: { indexable: boolean }): MetadataRoute.Robots {
+  const siteUrl = getSiteUrl();
+
+  if (!input.indexable) {
+    return {
+      rules: [{ userAgent: "*", disallow: "/" }],
+      host: siteUrl.origin,
+    };
+  }
 
   return {
     rules: [
       {
         userAgent: "*",
-        disallow: ["/admin-internal"],
+        allow: "/",
+        disallow: ROBOTS_DISALLOWED_PATHS,
       },
     ],
     sitemap: new URL("/sitemap.xml", siteUrl).toString(),
+    host: siteUrl.origin,
   };
 }
+
+export default async function robots(): Promise<MetadataRoute.Robots> {
+  noStore();
+  const [seo, maintenanceEnabled] = await Promise.all([getSeoSettings(), getMaintenanceMode()]);
+
+  return buildRobots({ indexable: seo.allowIndexing && !maintenanceEnabled });
+}