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>

image/boot-README.txt

@@ -1,4 +1,4 @@
-VoxIP Kiosk OS — bestanden op deze bootpartitie
+Daynivo Kiosk OS — bestanden op deze bootpartitie
 ================================================
 
 Je kunt een kiosk vooraf instellen door vóór de eerste start bestanden op

image/build.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Build a flashable VoxIP Kiosk OS image (.img.xz) with pi-gen.
+# Build a flashable Daynivo Kiosk OS image (.img.xz) with pi-gen.
 #
 #   ./image/build.sh                 # build in Docker (recommended)
 #   sudo ./image/build.sh --native   # build directly on a Debian/Ubuntu host
@@ -24,7 +24,7 @@ PI_GEN_REPO="${PI_GEN_REPO:-https://github.com/RPi-Distro/pi-gen.git}"
 PI_GEN_REF="${PI_GEN_REF:-2024-11-19-raspios-bookworm-armhf}"
 RELEASE="${RELEASE:-bookworm}"
 VOXIP_DEFAULT_URL="${VOXIP_DEFAULT_URL:-https://schermen-ijsselflat.voxip.nl}"
-VOXIP_DEVICE_NAME="${VOXIP_DEVICE_NAME:-VoxIP Kiosk}"
+VOXIP_DEVICE_NAME="${VOXIP_DEVICE_NAME:-Daynivo Kiosk}"
 TARGET_HOSTNAME="${TARGET_HOSTNAME:-kiosk}"
 NATIVE=0
 [[ ${1:-} == "--native" ]] && NATIVE=1
@@ -49,7 +49,7 @@ PIGEN="$WORK/pi-gen"
 touch "$PIGEN/stage2/SKIP_IMAGES"
 rm -f "$PIGEN/stage2/EXPORT_NOOBS"
 
-echo "==> VoxIP-stage voorbereiden"
+echo "==> Daynivo-stage voorbereiden"
 cp -a "$ROOT/image/stage-voxip" "$PIGEN/stage-voxip"
 PAYLOAD="$PIGEN/stage-voxip/00-voxip/files/voxip-kiosk"
 mkdir -p "$PAYLOAD"

image/stage-voxip/00-voxip/00-run.sh

@@ -1,5 +1,5 @@
 #!/bin/bash -e
-# Install VoxIP Kiosk OS into the image with the same install.sh that is
+# Install Daynivo Kiosk OS into the image with the same install.sh that is
 # used on existing Raspberry Pi OS installations.
 
 # shellcheck disable=SC1091