feat(llm): openwebui

hosts/architect/llm.nix

@@ -10,7 +10,8 @@ in
     systemPackages = [ ollamaPkg ];
   };
 
-  services.ollama = {
+  services = {
+    ollama = {
       enable = true;
 
       package = ollamaPkg;
@@ -22,6 +23,9 @@ in
       };
     };
 
+    open-webui.enable = true;
+  };
+
   architect.vhost.${backendDomain} = {
     dnsInterfaces = [ "tailscale" "lan" ];
 
@@ -38,4 +42,15 @@ in
       '';
     };
   };
+
+  architect.vhost.${frontendDomain} = {
+    dnsInterfaces = [ "tailscale" "lan" ];
+
+    locations."/" = {
+      host = config.services.open-webui.host;
+      port = config.services.open-webui.port;
+      allowLan = true;
+      allowWAN = true;
+    };
+  };
 }