diff --git a/app.py b/app.py
index cdc90ec..ac8c6d0 100644
--- a/app.py
+++ b/app.py
@@ -18,6 +18,7 @@ from bp import (
 async def federation_context() -> dict:
     """Federation app context processor."""
     from shared.infrastructure.context import base_context
+    from shared.services.navigation import get_navigation_tree
     from shared.infrastructure.cart_identity import current_cart_identity
     from shared.infrastructure.fragments import fetch_fragment
 
@@ -27,6 +28,8 @@ async def federation_context() -> dict:
         "blog", "nav-tree",
         params={"app_name": "federation", "path": request.path},
     )
+    # Fallback for _nav.html when nav-tree fragment fetch fails
+    ctx["menu_items"] = await get_navigation_tree(g.s)
 
     # Cart data (consistent with all other apps)
     ident = current_cart_identity()
diff --git a/shared b/shared
index 7e650a0..ab674ad 160000
--- a/shared
+++ b/shared
@@ -1 +1 @@
-Subproject commit 7e650a0ee3a61d56525cc9e298ed0c4194e780a4
+Subproject commit ab674ada31f09edb1a4333e520d482e13e0c90da