feat(nix): enable sd-webui-forge and comfy-ui for server

nix/manifest.nix

@@ -23,7 +23,10 @@
             }
           ];
         };
-        extraCfg.server.web-apps.comfy-ui.enable = true;
+        extraCfg.server.web-apps = {
+          comfy-ui.enable = true;
+          sd-webui-forge.enable = true;
+        };
       };
       apollo = {
         graphical = false;

nix/modules/server/web-apps/sd-webui-forge.nix

@@ -0,0 +1,34 @@
+{
+  lib,
+  inputs,
+  config,
+  ...
+}:
+let
+  inherit (lib.lists) singleton;
+  inherit (config.flake.lib.services) mkWebApp;
+in
+{
+  flake.modules.nixos.default =
+    { config, ... }:
+    let
+      upstreamCfg = config.services.sd-webui-forge;
+    in
+    mkWebApp {
+      inherit config;
+      name = "sd-webui-forge";
+      defaultPort = 7860;
+      persistDirs = singleton {
+        directory = upstreamCfg.dataDir;
+        inherit (upstreamCfg) user group;
+      };
+      extraConfig.services.sd-webui-forge = {
+        enable = true;
+        listen = true;
+        extraArgs = "--cuda-malloc";
+      };
+    }
+    // {
+      imports = [ inputs.stable-diffusion-webui-nix.nixosModules.default ];
+    };
+}