feat: major Calamares overhaul — dracut migration, branding polish, online/offline installer split

=== Calamares (core) ===
- Unskip packagechooserq from _skip_modules so it compiles in
- pkgrel 2→3

=== Calamares Branding ===
branding.desc:
- Blue Antergos color scheme (#4A9EFF accent, #20252B sidebar)
- New Antergos logo/icon PNGs from cnchi assets
- Larger window (860x540)
- Fix sidebar/navigation to widget mode

stylesheet.qss:
- Blue-themed QSS with gradients, styled buttons/inputs/sidebar

show.qml:
- 6-slide Calamares slideshow: welcome, EndeavourOS base, DE list,
  Antergos tools, finishing, thank-you (dark slide)

dracut migration:
- dracut.conf (NEW): initramfsName for dracut module compatibility
- Remove mkinitcpio reference, dracut handles initramfs generation

=== Online/Offline Installer Split ===
Problem: unpackfs (GNOME squashfs) + netinstall (selected DE) installs
two DEs — wasteful and messy.
Solution: Two entirely separate Calamares configurations.

settings_offline.conf (NEW):
- Traditional unpackfs path, no netinstall steps
- Installs GNOME from pre-built squashfs (current behavior)
- Used by default `calamares` or via `calamares -c /etc/calamares-offline`

settings_online.conf (NEW):
- No unpackfs — everything installed from internet via netinstall
- netinstall in both show (DE selection) and exec (package install)
- Base system + Antergos packages as hidden/immutable groups
- Used via `calamares -c /etc/calamares-online`

netinstall.yaml (NEW):
- Base System (hidden, immutable): kernel, base, firmware, network
- Antergos Packages (hidden, immutable): wallpapers, welcome, yay, calamares
- 8 Desktop Environments: KDE, GNOME, Xfce, Budgie, Cinnamon, MATE, LXQt, i3/Sway
- Hardware Support group: GPU drivers, vulkan, pipewire

netinstall.conf (NEW): groupsUrl pointing to netinstall.yaml

welcome.conf (NEW): internet check (informational), 8GB storage/2GB RAM/power required

calamares-next.sh (NEW): Launcher script — zenity/kdialog/dialog
choice between Offline and Online, runs Calamares with the right config.
Checks internet connectivity before starting online install.

PKGBUILD install layout:
- Branding shared at /usr/share/calamares/branding/antergos-next/
- Modules shared at /etc/calamares/modules/
- /etc/calamares-offline/  — settings.conf for offline
- /etc/calamares-online/   — settings.conf for online
- /etc/calamares/settings.conf → symlink to offline (default)
- /usr/bin/calamares-next  — launcher script

=== Antergos Welcome ===
PKGBUILD: copy data/preferences.json to package root (fixes
runtime preferences loading in subdirectory layout)

packages/calamares-branding-antergos-next/PKGBUILD

@@ -2,76 +2,71 @@
 
 pkgname=calamares-branding-antergos-next
 pkgver=1.0
-pkgrel=2
-pkgdesc="Minimal Calamares branding for Antergos NeXT"
+pkgrel=5
+pkgdesc="Calamares branding for Antergos NeXT with offline/online installer support"
 arch=('any')
 url="https://github.com/Antergos-NeXT"
 license=('GPL3')
 depends=('calamares')
+optdepends=('zenity: graphical mode chooser dialog')
 source=("branding.desc"
         "stylesheet.qss"
-        "show.qml")
+        "show.qml"
+        "unpackfs.conf"
+        "dracut.conf"
+        "antergos-logo.png"
+        "antergos-icon.png"
+        "netinstall.yaml"
+        "netinstall.conf"
+        "welcome.conf"
+        "settings_offline.conf"
+        "settings_online.conf"
+        "calamares-next.sh")
 sha256sums=('SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
+            'SKIP'
             'SKIP'
             'SKIP')
 
 package() {
+  # Branding data (shared between offline/online)
   local _brand="/usr/share/calamares/branding/antergos-next"
   install -dm755 "${pkgdir}${_brand}"
-
   cp "branding.desc" "${pkgdir}${_brand}/"
   cp "stylesheet.qss" "${pkgdir}${_brand}/"
   cp "show.qml" "${pkgdir}${_brand}/"
+  cp "antergos-logo.png" "${pkgdir}${_brand}/"
+  cp "antergos-icon.png" "${pkgdir}${_brand}/"
 
-  # Symlink Antergos logo from cnchi or wallpapers
-  # Use antergos-icon from system if available
+  # Shared Calamares modules
+  install -dm755 "${pkgdir}/etc/calamares/modules"
+  cp "unpackfs.conf" "${pkgdir}/etc/calamares/modules/"
+  cp "dracut.conf" "${pkgdir}/etc/calamares/modules/"
+  cp "netinstall.conf" "${pkgdir}/etc/calamares/modules/"
+  cp "netinstall.yaml" "${pkgdir}/etc/calamares/modules/"
+  cp "welcome.conf" "${pkgdir}/etc/calamares/modules/"
+
+  # Offline config directory
+  install -dm755 "${pkgdir}/etc/calamares-offline"
+  cp "settings_offline.conf" "${pkgdir}/etc/calamares-offline/settings.conf"
+
+  # Online config directory
+  install -dm755 "${pkgdir}/etc/calamares-online"
+  cp "settings_online.conf" "${pkgdir}/etc/calamares-online/settings.conf"
+
+  # Default: offline mode (for direct calamares launch)
   install -dm755 "${pkgdir}/etc/calamares"
-  cat > "${pkgdir}/etc/calamares/settings.conf" << 'CONF'
----
-modules-search: [ local ]
+  ln -sf "../calamares-offline/settings.conf" "${pkgdir}/etc/calamares/settings.conf"
 
-sequence:
-- show:
-  - welcome
-  - locale
-  - keyboard
-  - partition
-  - users
-  - summary
-- exec:
-  - partition
-  - mount
-  - unpackfs
-  - machineid
-  - fstab
-  - locale
-  - keyboard
-  - localecfg
-  - luksbootkeyfile
-  - luksopenswaphookcfg
-  - initcpiocfg
-  - initcpio
-  - users
-  - displaymanager
-  - networkcfg
-  - hwclock
-  - services-systemd
-  - grubcfg
-  - bootloader
-  - packages
-  - removeuser
-  - umount
-- show:
-  - finished
-
-branding: antergos-next
-
-prompt-install: false
-dont-chroot: false
-oem-setup: false
-disable-cancel: false
-disable-cancel-during-exec: false
-hide-back-and-next-during-exec: false
-quit-at-end: false
-CONF
+  # Launcher script
+  install -dm755 "${pkgdir}/usr/bin"
+  install -m755 "calamares-next.sh" "${pkgdir}/usr/bin/calamares-next"
 }