Fix issues found testing stage 5 in a VM

- Calamares branding takes the version from VERSION at ISO build time
- das-update tray hides its icon when updates were installed elsewhere
  (watches the xbps package database)
- Installer removes guest tools of other hypervisors; the live image
  starts VBoxClient only inside VirtualBox
- Live session no longer locks the screen while the installer runs
- das-tools 0.2.0, das-installer 0.2.0, das-settings 0.4.0

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

srcpkgs/das-installer/files/calamares/branding/dasos/branding.desc

@@ -12,10 +12,10 @@ navigation: widget
 strings:
     productName: "Das OS"
     shortProductName: "Das OS"
-    version: "0.2.0"
-    shortVersion: "0.2"
-    versionedName: "Das OS 0.2.0"
-    shortVersionedName: "Das OS 0.2"
+    version: "@VERSION@"
+    shortVersion: "@SHORT_VERSION@"
+    versionedName: "Das OS @VERSION@"
+    shortVersionedName: "Das OS @SHORT_VERSION@"
     bootloaderEntryName: "Das OS"
     productUrl: "https://git.das.org.ua/das/Das-OS"
     supportUrl: "https://git.das.org.ua/das/Das-OS/issues"

srcpkgs/das-installer/files/postinstall

@@ -22,12 +22,27 @@ if ! grep -q '^[^#]*[[:space:]]/tmp[[:space:]]' /etc/fstab; then
 	echo "tmpfs /tmp tmpfs defaults,nosuid,nodev 0 0" >>/etc/fstab
 fi
 
-# Guest tools are only useful inside a virtual machine.
+# Guest tools only help inside their own hypervisor (VirtualBox's ones even
+# complain at every login elsewhere).
+machine=$(cat /sys/class/dmi/id/sys_vendor /sys/class/dmi/id/product_name 2>/dev/null || true)
 if ! grep -q '^flags.* hypervisor' /proc/cpuinfo; then
-	msg "real hardware: removing virtual machine guest tools"
-	rm -f /etc/runit/runsvdir/default/spice-vdagentd
-	xbps-remove -Ry spice-vdagent qemu-ga virtualbox-ose-guest || true
+	machine="real hardware"
 fi
+case $machine in
+*VirtualBox* | *innotek*) unused="spice-vdagent qemu-ga" ;;
+*QEMU* | *KVM*) unused="virtualbox-ose-guest" ;;
+*) unused="spice-vdagent qemu-ga virtualbox-ose-guest" ;;
+esac
+msg "removing guest tools not needed here: $unused"
+case $unused in
+*spice-vdagent*) rm -f /etc/runit/runsvdir/default/spice-vdagentd ;;
+esac
+case $unused in
+# The live image replaces this autostart file, so xbps keeps it as modified
+*virtualbox*) rm -f /etc/xdg/autostart/vboxclient.desktop ;;
+esac
+# shellcheck disable=SC2086
+xbps-remove -Ry $unused || true
 
 # Snapper, hourly snapshots and the GRUB snapshot menu (Btrfs only).
 das-snapper-setup