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cdc27eb517
The original #1429 fix's _refresh_ip_encoding early-returned when mqtt_server.bind_address was "0.0.0.0" or empty (the default for VPs created without a dedicated bind IP). On a flat-LAN install that's the typical case, so the encoding never armed, _rewrite_net_info_ips was a no-op on every push, and the slicer kept following the real printer IP to its SD card. @Mape6 reported this on the 2026-06-02 daily that supposedly fixed the bug. New helper _resolve_host_interface_for_target() consults the existing network_utils.find_interface_for_ip() to pick the host interface in the printer's subnet. _refresh_ip_encoding falls back to it when bind_address is unspecified; an explicit bind IP still wins. INFO log line distinguishes the two paths ("armed: ... (bind_address)" vs "(auto-resolved)") so future bundles directly answer which IP the rewrite picked. Tests: 4 new under TestBindAddressAutoResolve — rewrite arms via auto-resolved IP at bind_address=0.0.0.0; stays disabled if no interface matches (no crash); explicit bind_ip still takes precedence; helper returns None defensively when find_interface_for_ip does.