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ServerConfig grows two fields: - BindAddresses: list of IPs Kestrel binds to (empty = all interfaces, current behavior). Listening only on a subset is useful when the host has multiple NICs and the webhook should not be reachable on all of them. - DisplayHost: the hostname/IP the GUI splices into the URL column and Copy URL button. Cosmetic; doesn't affect what the server accepts. Server Settings dialog gains a "Network" section: a checkbox for "all interfaces" plus per-NIC checkboxes auto-detected via NetworkInterface. GetAllNetworkInterfaces, and an editable ComboBox for the display host pre-populated with detected IPs and the machine name. Listener restart fires on BindAddresses change but not on DisplayHost change (cosmetic). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>