Move desktop and e2e into examples/ directory

- desktop/ → examples/django-react-desktop-app/
- e2e/ → examples/django-react-site/
- example/ → examples/django-react-site/backend/
- Update Dockerfile.test, Makefile, playwright config, and
  django.config.mjs path references

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

examples/django-react-desktop-app/backend/urls.py

@@ -0,0 +1,34 @@
+from django.urls import include, path, re_path
+from django.http import HttpResponse, HttpResponseNotFound
+from pathlib import Path
+
+DIST_DIR = Path(__file__).resolve().parent.parent / "frontend" / "dist"
+
+CONTENT_TYPES = {
+    ".html": "text/html",
+    ".js": "application/javascript",
+    ".css": "text/css",
+    ".svg": "image/svg+xml",
+    ".png": "image/png",
+    ".ico": "image/x-icon",
+    ".woff2": "font/woff2",
+    ".json": "application/json",
+}
+
+
+def serve_dist(request, path="index.html"):
+    file_path = (DIST_DIR / path).resolve()
+
+    if not str(file_path).startswith(str(DIST_DIR)) or not file_path.is_file():
+        return HttpResponseNotFound()
+
+    ct = CONTENT_TYPES.get(file_path.suffix, "application/octet-stream")
+    return HttpResponse(file_path.read_bytes(), content_type=ct)
+
+
+urlpatterns = [
+    path("api/mizan/", include("mizan.urls")),
+    re_path(r"^(?P<path>assets/.+)$", serve_dist),
+    path("favicon.ico", serve_dist, {"path": "favicon.ico"}),
+    path("", serve_dist),
+]