users/guest: add jellyfin-media-player user unit

users/guest/common/optional/graphical/jellyfin.nix

@@ -0,0 +1,31 @@
+{
+  pkgs,
+  ...
+}:
+{
+  home.packages = with pkgs; [
+    gamescope
+    jellyfin-media-player
+  ];
+
+  home.persistence."/persist".directories = [
+    ".config/jellyfin.org"
+  ];
+
+  systemd.user.services.jellyfin-media-player = {
+    Unit = {
+      Description = "Jellyfin Media Player in Gamescope";
+      After = [
+        "graphical.target"
+        "default.target"
+      ];
+    };
+    Service = {
+      ExecStart = ''
+        ${pkgs.gamescope}/bin/gamescope --rt --backend drm -- \
+          ${pkgs.jellyfin-media-player}/bin/jellyfinmediaplayer --tv --scale-factor 2
+      '';
+      Restart = "always";
+    };
+  };
+}

users/guest/default.nix

@@ -27,6 +27,7 @@ in
 
   home-manager.users.${name} = {
     imports = [
+      ./common/optional/graphical/jellyfin.nix
       ./common/optional/graphical/steam.nix
       {
         home.persistence."/state" = {
@@ -36,7 +37,6 @@ in
         };
         home.persistence."/persist" = {
           directories = [
-            ".config/jellyfin.org"
             ".local/share/icons"
           ];
         };