fix template context passing to http request

src/torrent_downloader/app.py

@@ -31,7 +31,7 @@ def hx(func):
             response = templates.TemplateResponse(
                 request,
                 name="index.html",
-                context={"include_template": response.template.name},
+                context=response.context | {"include_template": response.template.name},
                 status_code=200,
             )
         return response