Update flake.lock and refine module settings

Bump revisions, hashes and timestamps in flake.lock for several inputs.

Simplify greetd configuration by using a direct default_session
assignment.
Restructure core stylix targets, adding a kmscon placeholder and
reorganizing limine options.
Remove empty GTK4 theme block, keeping only the dark‑theme flag in extra
config.
Extend home stylix: enable librewolf with extra options and add a GTK
target with colors, fonts, and flatpak support.

modules/home/stylix.nix

@@ -4,7 +4,13 @@
   ...
 }: {
   stylix.targets = {
-    librewolf.profileNames = ["${host}"];
+    librewolf = {
+      profileNames = ["${host}"];
+      enable = true;
+      firefoxGnomeTheme.enable = true;
+      fonts.enable = true;
+      inputs.enable = true;
+    };
 
     hyprland = {
       enable = true;
@@ -25,6 +31,13 @@
 
     noctalia-shell.enable = true;
 
+    gtk = {
+      enable = true;
+      colors.enable = true;
+      flatpakSupport.enable = true;
+      fonts.enable = true;
+    };
+
     qt = {
       enable = true;
       platform = "qtct";