Updated everything

hosts/common/optional/lxqt-greeter.nix

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+# LXQt Default Greeter (SDDM with LXQt theme)
+#
+# This module configures SDDM as the display manager with LXQt theming
+# to provide a consistent greeter experience for LXQt desktop environments.
+#
+# Features:
+# - SDDM display manager with Wayland support
+# - LXQt theme integration for the greeter
+# - Proper session detection for LXQt-based environments
+# - Qt theming consistency between greeter and desktop
+#
+# Usage:
+# Add this to your host configuration instead of gdm.nix:
+#   imports = lib.flatten [
+#     # ... other imports ...
+#     "hosts/common/optional/lxqt-greeter.nix"
+#   ];
+#
+{pkgs, ...}: {
+  # Enable SDDM as the display manager
+  services.displayManager = {
+    sddm = {
+      enable = true;
+      wayland = {
+        enable = true;
+        compositor = "kwin"; # Use KWin for the greeter compositor
+      };
+      # Use LXQt theme for SDDM
+      theme = "breeze"; # Breeze theme works well with LXQt
+    };
+  };
+
+  # Install SDDM themes and LXQt integration packages
+  environment.systemPackages = with pkgs; [
+    # SDDM themes that work well with LXQt
+    kdePackages.sddm-kcm # SDDM configuration module
+
+    # Additional SDDM themes (optional)
+    where-is-my-sddm-theme
+  ];
+
+  # Ensure proper font rendering for the greeter
+  fonts = {
+    packages = with pkgs; [
+      noto-fonts
+      noto-fonts-cjk-sans
+      noto-fonts-emoji
+      liberation_ttf
+      fira-code
+      fira-code-symbols
+    ];
+
+    fontconfig = {
+      defaultFonts = {
+        serif = ["Noto Serif"];
+        sansSerif = ["Noto Sans"];
+        monospace = ["Fira Code"];
+      };
+    };
+  };
+
+  # SDDM configuration
+  environment.etc."sddm.conf".text = ''
+    [Autologin]
+    Relogin=false
+    Session=
+    User=
+
+    [General]
+    HaltCommand=/run/current-system/systemd/bin/systemctl poweroff
+    RebootCommand=/run/current-system/systemd/bin/systemctl reboot
+
+    [Theme]
+    Current=breeze
+    CursorTheme=breeze_cursors
+    Font=Noto Sans,10,-1,0,50,0,0,0,0,0
+
+    [Users]
+    MaximumUid=60513
+    MinimumUid=1000
+
+    [Wayland]
+    EnableHiDPI=true
+    SessionDir=/run/current-system/sw/share/wayland-sessions
+
+    [X11]
+    EnableHiDPI=true
+    SessionDir=/run/current-system/sw/share/xsessions
+  '';
+}