Fix services.get() → services.blog_page attribute access

The service registry uses __getattr__, so .get() is interpreted
as looking up a service named "get". Use attribute access instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

blog/bp/snippets/routes.py

@@ -13,7 +13,7 @@ VALID_VISIBILITY = frozenset({"private", "shared", "admin"})
 async def _render_snippets():
     """Render snippets list via service data + .sx defcomp."""
     from shared.services.registry import services
-    data = await services.get("blog_page").snippets_data(g.s)
+    data = await services.blog_page.snippets_data(g.s)
     return await render_to_sx("blog-snippets-content", **data)