diff --git a/install.sh b/install.sh
index 2890822..6b34045 100644
--- a/install.sh
+++ b/install.sh
@@ -766,7 +766,7 @@ set +e
 run_migration
 migration_rc=$?
 set -e
-if (( migration_rc != 0 )); then
+if [[ $migration_rc -ne 0 ]]; then
   persist_installer_log
   if (( EXISTING_DB )); then
     die "已有数据库迁移失败（退出码：$migration_rc）"
@@ -774,9 +774,15 @@ if (( migration_rc != 0 )); then
   die "数据库初始化失败（退出码：$migration_rc）"
 fi
 printf '数据库初始化完成\n'
+printf '数据库初始化完成\n' >>"$INSTALL_LOG"
 progress '启动 XyMediaVault 服务'
-if ! run_logged "${COMPOSE[@]}" --project-directory "$INSTALL_DIR" --env-file "$INSTALL_DIR/.env" -f "$INSTALL_DIR/compose.yaml" "${COMPOSE_FUSE[@]}" up -d app; then
-  die 'XyMediaVault 启动失败'
+set +e
+run_logged "${COMPOSE[@]}" --project-directory "$INSTALL_DIR" --env-file "$INSTALL_DIR/.env" -f "$INSTALL_DIR/compose.yaml" "${COMPOSE_FUSE[@]}" up -d app
+app_start_rc=$?
+set -e
+if [[ $app_start_rc -ne 0 ]]; then
+  persist_installer_log
+  die "XyMediaVault 启动失败（退出码：$app_start_rc）"
 fi
 wait_for_app_health() {
   local started_at elapsed app_wait_interrupted=0 previous_int previous_term