From cb197667bf3e11461c98cdfd71a6007703649061 Mon Sep 17 00:00:00 2001
From: weichen <weichen@home.local>
Date: Tue, 20 Oct 2026 13:25:21 +0000
Subject: [PATCH] Advance the composed backend pin to b8b8e91 (categorized
 work-failure presentation restored)

Why: the composition merge resolution lost main's categorized error
presentation for the U3 read path; the fix combines the U3 read decision
with main's categorized failure presentation (both reviewed lines).

Impact: backend gitlink pin.

Refs: PR #634.
---
 modules/backend | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/backend b/modules/backend
index bd640df8..b8b8e916 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit bd640df8d0fde1fa99e9b06540f466145c7f8bb1
+Subproject commit b8b8e91688fba70a171b76c316ffb17d1a0d0821