diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index 65c4e37d..cf483705 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -339,7 +339,7 @@ jobs:
         run: |
           set -euo pipefail
           SUDO=""
-          if command -v sudo >/dev/null 2>&1 && [ [ "$(id -u)" != 0 ]; then SUDO=sudo; fi
+          if command -v sudo >/dev/null 2>&1 && [ "$(id -u)" != 0 ]; then SUDO=sudo; fi
           $SUDO apt-get update -y
           $SUDO apt-get install -y postgresql postgresql-contrib postgresql-16-pgvector redis-server
           # 固定组件/扩展版本输出（随日志归档，作为验收对齐依据）。
@@ -359,8 +359,8 @@ jobs:
           $SUDO service postgresql start || $SUDO pg_ctlcluster 16 main start
           # 预装 pg_trgm 到 public：与测试辅助的幂等预装一致，锁定的组件契约；
           # pgvector 版本一并输出（随日志归档，作为验收对齐依据）。
-          pg_as_postgres psql -tAc "CREATE EXTENSION IF NOT EXISTS pgvector"
-          pg_as_postgres psql -tAc "SELECT extname || '=' || extversion FROM pg_extension WHERE extname IN ('pgvector','pg_trgm')"
+          pg_as_postgres psql -tAc "CREATE EXTENSION IF NOT EXISTS vector"
+          pg_as_postgres psql -tAc "SELECT extname || '=' || extversion FROM pg_extension WHERE extname IN ('vector','pg_trgm')"
           pg_as_postgres psql -c "CREATE USER ci_agent PASSWORD 'ci_job_local_only' CREATEDB"
           pg_as_postgres psql -c "CREATE DATABASE agent_test OWNER ci_agent"
           pg_as_postgres psql -d agent_test -c "CREATE EXTENSION IF NOT EXISTS pg_trgm"
diff --git a/modules/backend b/modules/backend
index 24975082..efbd7b1d 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit 24975082713bc6c67aa955e28af4bd98d46827d7
+Subproject commit efbd7b1d04a25e3501121ac7ac3392ad620f4e07