feat(installer): update CusDeb OS installer branding

installer/VERSION

@@ -1 +1 @@
-0.0.0
+0.0.1

installer/config/includes.chroot/etc/calamares/branding/cusdeb/branding.desc

@@ -1,6 +1,6 @@
 ---
 componentName:   cusdeb
-welcomeStyleCalamares: true
+welcomeStyleCalamares: false
 welcomeExpandingLogo: true
 windowExpanding: normal
 windowSize: 800px,580px
@@ -9,16 +9,16 @@ windowPlacement: center
 strings:
     productName:         CusDeb OS
     shortProductName:    CusDeb
-    version:             1
-    shortVersion:        1
-    versionedName:       CusDeb OS 1
-    shortVersionedName:  CusDeb OS 1
+    version:             ""
+    shortVersion:        ""
+    versionedName:       CusDeb OS
+    shortVersionedName:  CusDeb OS
     bootloaderEntryName: CusDeb OS
-    productUrl:          https://github.com/CusDeb
-    supportUrl:          https://github.com/CusDeb
-    knownIssuesUrl:      https://github.com/CusDeb
-    releaseNotesUrl:     https://github.com/CusDeb
-    donateUrl:           https://github.com/CusDeb
+    productUrl:          https://github.com/cusdeb-com/os
+    supportUrl:          https://github.com/cusdeb-com/os
+    knownIssuesUrl:      https://github.com/cusdeb-com/os/issues
+    releaseNotesUrl:     https://github.com/cusdeb-com/os/releases
+    donateUrl:           https://cusdeb.com/cdmag
 
 sidebar: widget
 navigation: widget
@@ -31,9 +31,9 @@ images:
 slideshow:               "show.qml"
 
 style:
-   SidebarBackground:    "#26475b"
+   SidebarBackground:    "#74A7E2"
    SidebarText:          "#FFFFFF"
-   SidebarTextCurrent:   "#fbfbfb"
-   SidebarBackgroundCurrent: "#265370"
+   SidebarTextCurrent:   "#FFFFFF"
+   SidebarBackgroundCurrent: "#193576"
 
 slideshowAPI: 2

installer/config/includes.chroot/etc/calamares/branding/cusdeb/show.qml

@@ -14,7 +14,7 @@ Presentation
     Slide {
         Image {
             id: background1
-            source: "slide1.png"
+            source: "welcome.png"
             width: 467; height: 280
             fillMode: Image.PreserveAspectFit
             anchors.centerIn: parent

installer/config/includes.chroot/etc/calamares/branding/cusdeb/stylesheet.qss

@@ -0,0 +1,2 @@
+/* CusDeb OS installer theme: pure white main window background. */
+#mainApp { background-color: #FFFFFF; }

installer/config/includes.chroot/etc/calamares/modules/packages.conf

@@ -5,3 +5,8 @@ operations:
       - "^live-*"
       - calamares-settings-debian
       - calamares
+      - qml6-module-qtqml
+      - qml6-module-qtqml-models
+      - qml6-module-qtqml-workerscript
+      - qml6-module-qtquick
+      - qml6-module-qtquick-window

installer/config/includes.chroot/etc/calamares/modules/unpackfs.conf

@@ -0,0 +1,10 @@
+# Based on the Debian package default, with one addition: the live-only
+# /usr/sbin/xdg-open wrapper (see includes.chroot/usr/sbin/xdg-open) must
+# not be copied to the installed system, so it is excluded from the copy.
+---
+unpack:
+    -   source: "/run/live/medium/live/filesystem.squashfs"
+        sourcefs: "squashfs"
+        destination: ""
+        exclude:
+            - /usr/sbin/xdg-open

installer/config/includes.chroot/usr/sbin/xdg-open

@@ -0,0 +1,34 @@
+#!/bin/sh
+# Wrapper around /usr/bin/xdg-open for the live installer session.
+#
+# Calamares runs as root (pkexec via calamares-install-debian), so
+# QDesktopServices::openUrl() spawns xdg-open as root. A browser started
+# as root cannot (and must not) attach to the live user's X session, so
+# the welcome-page buttons (support/known-issues/release-notes) silently
+# did nothing.
+#
+# pkexec gives root a PATH of /usr/sbin:/usr/bin:/sbin:/bin (no
+# /usr/local/bin), so this file lives in /usr/sbin, ahead of the real
+# /usr/bin/xdg-open. When invoked as root it re-runs the real xdg-open
+# as the live user; otherwise it just forwards the call.
+#
+# pkexec (allow_gui=true in the Calamares polkit action) already passes
+# the live session's DISPLAY and XAUTHORITY into root's environment, so
+# they are inherited; the :- fallbacks below only cover callers that
+# lack them.
+#
+# Note: this file is live-only. Calamares' unpackfs configuration
+# (modules/unpackfs.conf) excludes it from the copy to the target disk,
+# so it never lands on the installed system.
+
+REAL_XDG_OPEN=/usr/bin/xdg-open
+LIVE_USER=user
+
+if [ "$(id -u)" = 0 ] && id "${LIVE_USER}" >/dev/null 2>&1; then
+    exec runuser -u "${LIVE_USER}" -- env \
+        DISPLAY="${DISPLAY:-:0}" \
+        XAUTHORITY="${XAUTHORITY:-/home/${LIVE_USER}/.Xauthority}" \
+        "${REAL_XDG_OPEN}" "$@"
+fi
+
+exec "${REAL_XDG_OPEN}" "$@"

installer/config/package-lists/calamares.list.chroot

@@ -1,6 +1,12 @@
 calamares
 calamares-settings-debian
 
+# QML modules required by the Calamares slideshow (slideshowAPI 2).
+# Without them the exec-phase slideshow fails with
+# "module "QtQuick.Window" is not installed" and shows a blank page.
+qml6-module-qtquick
+qml6-module-qtquick-window
+
 # Password strength dictionary required by Calamares users module
 # Without it the installer prints: "the password fails the dictionary check - error loading dictionary"
 cracklib-runtime
@@ -83,6 +89,7 @@ usbutils
 # Essentials
 sudo
 ca-certificates
+xdg-utils
 
 # Optional packages pre-installed in live so they are available in target
 # regardless of Calamares network state. The optional-packages-apply job