Rename the visible VoxIP texts to Daynivo

Product name (Daynivo Kiosk OS), default device name, kiosk screens,
service descriptions, installer output and docs. Internal names
(voxip-kiosk-*, /etc/voxip-kiosk, user voxip, VOXIP_* variables) stay.
An update renames a device still called "VoxIP Kiosk" to the new default.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

uninstall.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Remove VoxIP Kiosk OS.
+# Remove Daynivo Kiosk OS.
 #
 #   sudo ./uninstall.sh          # remove programs and services, keep configuration
 #   sudo ./uninstall.sh --purge  # also remove configuration, state, logs and users
@@ -65,9 +65,9 @@ if [[ $PURGE -eq 1 ]]; then
   groupdel voxip 2>/dev/null || true
 else
   echo "    Configuratie bewaard in /etc/voxip-kiosk (verwijderen met --purge)."
-  echo "    VoxIP-netwerkprofielen (voxip-eth0/voxip-wlan0) blijven actief."
+  echo "    Daynivo-netwerkprofielen (voxip-eth0/voxip-wlan0) blijven actief."
 fi
 
 if [[ -n $PREVIOUS_TARGET ]]; then systemctl set-default "$PREVIOUS_TARGET" >/dev/null 2>&1 || true; fi
 for dm in "${DISABLED_DMS[@]}"; do systemctl enable "$dm" >/dev/null 2>&1 || true; done
-echo "==> VoxIP Kiosk OS is verwijderd. Herstart de Raspberry Pi om de kiosk te stoppen."
+echo "==> Daynivo Kiosk OS is verwijderd. Herstart de Raspberry Pi om de kiosk te stoppen."