add ollama and safe mode

modules/system/homelab/ai.nix

@@ -1,3 +1,19 @@
 { ... }: {
-  
+  services = {
+    ollama = {
+      enable = true;
+      host = "127.0.0.1";
+      port = 11434;
+      # loadModels = [ "gemma3n:e4b" "gemma3n:e2b"  ];
+    };
+    open-webui = {
+      enable = true;
+      port = 8080;
+      environment = {
+        OLLAMA_BASE_URL = "http://localhost:11434";
+        WEBUI_AUTH = "False";
+        
+      };
+    };
+  };
 }