fix(portal): read NAS backup history from local log to avoid macOS SMB TCC prompt

scripts/backup-to-nas.sh

@@ -28,6 +28,10 @@ tar -czf "$ARCHIVE" \
     README.md PLAN.md CHANGELOG.md 2>/dev/null || true
 
 # 保留最近 30 份备份
+COUNT=$(ls -1t "$NAS_BACKUP_DIR"/homelab_backup_*.tar.gz 2>/dev/null | wc -l | tr -d ' ')
 ls -1t "$NAS_BACKUP_DIR"/homelab_backup_*.tar.gz 2>/dev/null | tail -n +31 | xargs rm -f 2>/dev/null || true
 
-echo "[$(date '+%Y-%m-%d %H:%M:%S')] [OK] 已备份至极空间: $ARCHIVE"
+MSG="[$(date '+%Y-%m-%d %H:%M:%S')] [OK] 已备份至极空间 (共${COUNT}份): $ARCHIVE"
+echo "$MSG"
+mkdir -p /Users/ixvii0iv/homelab/logs
+echo "$MSG" >> /Users/ixvii0iv/homelab/logs/nas-backup.log