Added _lldpd_fix_interface() helper that detects the management interface via the default route and strips any .VID suffix (e.g. br-ap.10 → br-ap). LLDP is L2 and must run on the bridge itself — sending on a VLAN subinterface produces tagged frames the switch won't recognize as LLDP. The helper runs every poll so existing wrong configs (e.g. eth0 from the original install action) are corrected automatically on the next poll. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>