feat: DE selector with packagechooser, video wallpaper fix, slideshow redesign

- Replace dead init selector (packagechooser.conf, 303 lines) with
  packagechooser_de.conf + packagechooser_dm.conf (netinstall-add method)
- Remove init SVGs (dinit, openrc, runit, s6)
- Clean netinstall.yaml — Desktop group removed, DEs added dynamically
- Update calamares-online/settings.conf with packagechooser@de + @dm instances
- Fix set-antergos-wallpaper.sh: Array() not [], no reloadConfig()
- Rewrite installer, launcher, and live-overlay docs

iso-profiles/antergos/live-overlay/etc/calamares-online/modules/netinstall.yaml

@@ -84,83 +84,7 @@
     - oh-my-posh-bin
     - pacseek
 
-- name: "Desktop"
-  description: "DE"
-  selected: true
-  critical: false
-  subgroups:
-    - name: "Plasma"
-      description: "KDE Plasma Desktop"
-      selected: true
-      packages:
-        - plasma
-        - ark
-        - dolphin
-        - ffmpegthumbs
-        - gwenview
-        - kate
-        - keditbookmarks
-        - kfind
-        - kgpg
-        - kio-admin
-        - konsole
-        - konversation
-        - kwalletmanager
-        - okular
-        - partitionmanager
-    - name: "Xfce"
-      description: "Xfce Desktop"
-      selected: false
-      packages:
-        - xfce4
-        - xfce4-goodies
-    - name: "Cinnamon"
-      description: "Cinnamon Desktop"
-      selected: false
-      packages:
-        - cinnamon
-        - cinnamon-control-center
-        - cinnamon-desktop
-        - cinnamon-menus
-        - cinnamon-screensaver
-        - cinnamon-session
-        - cinnamon-settings-daemon
-        - cinnamon-translations
-    - name: "MATE"
-      description: "MATE Desktop"
-      selected: false
-      packages:
-        - mate
-        - mate-extra
-    - name: "LXQt"
-      description: "LXQt Desktop"
-      selected: false
-      packages:
-        - lxqt
-    - name: "i3"
-      description: "i3 Tiling WM"
-      selected: false
-      packages:
-        - i3
-    - name: "Sway"
-      description: "Sway Wayland Compositor"
-      selected: false
-      packages:
-        - sway
-        - swaybg
-        - swayidle
-        - swaylock
-    - name: "Hyprland"
-      description: "Hyprland Wayland Compositor"
-      selected: false
-      packages:
-        - hyprland
-        - xdg-desktop-portal-hyprland
-    - name: "COSMIC"
-      description: "COSMIC Desktop (Rust/Wayland — select greetd as DM)"
-      selected: false
-      packages:
-        - cosmic
+
 
 - name: "Init Services"
   description: "Essential dinit services"

iso-profiles/antergos/live-overlay/etc/calamares-online/modules/packagechooser_de.conf

@@ -0,0 +1,125 @@
+---
+mode: required
+method: netinstall-add
+labels:
+    step: "Desktop Environment"
+    step[de]: "Desktop-Umgebung"
+default: Plasma
+items:
+    - id: Plasma
+      name: "KDE Plasma"
+      description: "Full-featured modern desktop. The default Antergos NeXT experience."
+      screenshot: ""
+      netinstall:
+        name: "KDE Plasma"
+        selected: true
+        critical: false
+        packages:
+          - plasma
+          - ark
+          - dolphin
+          - ffmpegthumbs
+          - gwenview
+          - kate
+          - keditbookmarks
+          - kfind
+          - kgpg
+          - kio-admin
+          - konsole
+          - konversation
+          - kwalletmanager
+          - okular
+          - partitionmanager
+    - id: Xfce
+      name: "Xfce"
+      description: "Lightweight traditional desktop. Fast and low on resources."
+      screenshot: ""
+      netinstall:
+        name: "Xfce"
+        selected: true
+        critical: false
+        packages:
+          - xfce4
+          - xfce4-goodies
+    - id: Cinnamon
+      name: "Cinnamon"
+      description: "Traditional desktop with modern features (GNOME-based)"
+      screenshot: ""
+      netinstall:
+        name: "Cinnamon"
+        selected: true
+        critical: false
+        packages:
+          - cinnamon
+          - cinnamon-control-center
+          - cinnamon-desktop
+          - cinnamon-menus
+          - cinnamon-screensaver
+          - cinnamon-session
+          - cinnamon-settings-daemon
+          - cinnamon-translations
+    - id: MATE
+      name: "MATE"
+      description: "Classic desktop — continuation of GNOME 2"
+      screenshot: ""
+      netinstall:
+        name: "MATE"
+        selected: true
+        critical: false
+        packages:
+          - mate
+          - mate-extra
+    - id: LXQt
+      name: "LXQt"
+      description: "Lightweight Qt-based desktop"
+      screenshot: ""
+      netinstall:
+        name: "LXQt"
+        selected: true
+        critical: false
+        packages:
+          - lxqt
+    - id: i3
+      name: "i3"
+      description: "Minimal tiling window manager (keyboard-driven)"
+      screenshot: ""
+      netinstall:
+        name: "i3"
+        selected: true
+        critical: false
+        packages:
+          - i3
+    - id: Sway
+      name: "Sway"
+      description: "i3-compatible Wayland compositor"
+      screenshot: ""
+      netinstall:
+        name: "Sway"
+        selected: true
+        critical: false
+        packages:
+          - sway
+          - swaybg
+          - swayidle
+          - swaylock
+    - id: Hyprland
+      name: "Hyprland"
+      description: "Dynamic tiling Wayland compositor with eye candy"
+      screenshot: ""
+      netinstall:
+        name: "Hyprland"
+        selected: true
+        critical: false
+        packages:
+          - hyprland
+          - xdg-desktop-portal-hyprland
+    - id: COSMIC
+      name: "COSMIC"
+      description: "Modern Rust-based desktop. Select greetd as DM."
+      screenshot: ""
+      netinstall:
+        name: "COSMIC"
+        selected: true
+        critical: false
+        packages:
+          - cosmic

iso-profiles/antergos/live-overlay/etc/calamares-online/settings.conf

@@ -6,6 +6,7 @@ sequence:
         - welcome
         - locale
         - keyboard
+        - packagechooser@de
         - packagechooser@dm
         - netinstall
         - partition
@@ -38,6 +39,9 @@ sequence:
         - finished
 
 instances:
+- id:       de
+  module:   packagechooser
+  config:   packagechooser_de.conf
 - id:       dm
   module:   packagechooser
   config:   packagechooser_dm.conf