chore: System updates and config tweaks

Updated all flake inputs and applied srveral improvements to the
system configurations.

*** Updates
- Ran =flake update= to bring all dependencies to their latest
  versions.
- Pinned =lix-module= to the stable =release-2.93= branch to
  prevent breakages from its main branch.

*** System Configuration
- ssh: Reworked the client configuration to use a global =*= match
  block for secure defaults. Disabled the default home-manager
  config for removing nixpkgs' wrannings.
- intel-vaapi-driver: Enabled =enableHybridCodec= override to avoid
  to build whole package from scratch.
- kde: Forced the Qt platform theme to =kde= to fix a visual bug
  with Stylix.
- onnxruntime: Disabled CUDA/NCCL support to avoid to build the
  whole package from scratch.

*** Application Changes
- firefox: Switched the default browser package to =firefox-beta=
  across the entire configuration (NixOS, home-manager, and niri).
- editor: Removed =hurl= and =cmake-language-server= from the
  editor runtime environment for broken packages.

nixos/configurations/Tytonidae/default.nix

@@ -103,7 +103,7 @@
   services.scx = {
     enable = true;
     scheduler = "scx_lavd";
-    package = pkgs.scx_git.rustscheds;
+    package = pkgs.scx.rustscheds;
   };
 
   boot = {

nixos/modules/gui/default.nix

@@ -28,7 +28,10 @@ in
     environment.systemPackages = with pkgs; [
       fontconfig
     ];
-    programs.firefox.enable = true;
+    programs.firefox = {
+      enable = true;
+      package = pkgs.firefox-beta;
+    };
 
     fonts = {
       enableDefaultPackages = false;

nixos/modules/gui/kde.nix

@@ -8,6 +8,8 @@ let
 in
 {
   config = lib.mkIf (cfg.enabled == "kde") {
+    # Fix stylix bug
+    qt.platformTheme = lib.mkForce "kde";
     services = {
       desktopManager.plasma6.enable = true;
       displayManager.sddm.enable = true;

nixos/modules/gui/niri.nix

@@ -42,28 +42,28 @@ in
             "com.system76.CosmicFiles.desktop"
           ];
           "x-scheme-handler/about" = [
-            "firefox.desktop"
+            "firefox-beta.desktop"
             "chromium-browser.desktop"
           ];
           "x-scheme-handler/ftp" = [
-            "firefox.desktop"
+            "firefox-beta.desktop"
             "chromium-browser.desktop"
           ];
           "x-scheme-handler/http" = [
-            "firefox.desktop"
+            "firefox-beta.desktop"
             "chromium-browser.desktop"
           ];
           "x-scheme-handler/https" = [
-            "firefox.desktop"
+            "firefox-beta.desktop"
             "chromium-browser.desktop"
           ];
           "x-scheme-handler/mailto" = [
-            "firefox.desktop"
+            "firefox-beta.desktop"
             "chromium-browser.desktop"
           ];
           "x-scheme-handler/tg" = [ "telegramdesktop.desktop" ];
           "x-scheme-handler/unknown" = [
-            "firefox.desktop"
+            "firefox-beta.desktop"
             "chromium-browser.desktop"
           ];
           "image/gif" = [

nixos/modules/nix.nix

@@ -28,6 +28,13 @@
             "fluffychat-linux"
             "immersive-translate"
           ];
+        packageOverrides = p: {
+          intel-vaapi-driver = p.intel-vaapi-driver.override { enableHybridCodec = true; };
+          onnxruntime = p.onnxruntime.override {
+            cudaSupport = false;
+            ncclSupport = false;
+          };
+        };
       };
     };
     sops.secrets."access-tokens" = {