feat(nixos): refactor Git and GUI configuration handling

- Replaced `inherit` with explicit `settings` for Git user configuration.
- Unified Git configuration structure across NixOS and home modules.
- Adjusted GUI configuration by enabling `gdm.autoSuspend` and reordering options.

modules/home/tools/git/default.nix

@@ -31,13 +31,16 @@ in
     ];
     programs.git = {
       enable = true;
-      inherit (cfg) userName userEmail;
       lfs = enabled;
       signing = {
         key = cfg.signingKey;
         inherit (cfg) signByDefault;
       };
-      extraConfig = {
+      settings = {
+        user = {
+          email = cfg.userEmail;
+          name = cfg.userName;
+        };
         init = {
           defaultBranch = "main";
         };

modules/nixos/services/gui/default.nix

@@ -48,11 +48,13 @@ in
         pkgs.yubikey-personalization
       ];
 
+      displayManager.gdm.enable = true;
+      displayManager.gdm.autoSuspend = false;
+      desktopManager.gnome.enable = true;
+
       xserver = {
         xkb.layout = lib.mkDefault "de+us";
         enable = true;
-        displayManager.gdm.enable = true;
-        desktopManager.gnome.enable = true;
       };
     };
     #security.pam.p11.control = "sufficient";
@@ -209,6 +211,5 @@ in
     services.xrdp.enable = true;
     services.xrdp.defaultWindowManager = "${pkgs.gnome-session}/bin/gnome-session";
     services.xrdp.openFirewall = true;
-    services.xserver.displayManager.gdm.autoSuspend = false;
   };
 }

modules/nixos/tools/git/default.nix

@@ -26,13 +26,16 @@ in
     metacfg.home.extraOptions = {
       programs.git = {
         enable = true;
-        inherit (cfg) userName userEmail;
         lfs = enabled;
         signing = {
           key = cfg.signingKey;
           signByDefault = mkIf gpg.enable true;
         };
-        extraConfig = {
+        settings = {
+          user = {
+            email = cfg.userEmail;
+            name = cfg.userName;
+          };
           init = {
             defaultBranch = "main";
           };