networking: fix in-flight wifi (dns)

Fixes issue on in-flight wifi where I cannot access the login page.

Turns out, `insertNameservers` goes before the delta wifi nameserver,
this prevents `wifi.delta.com` from being resolved. So I need to use
`appendNameservers` instead.

home-manager/progs/opencode.nix

@@ -40,22 +40,6 @@ let
     };
   };
   oh-my-opencode-pkg = inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.oh-my-opencode;
-
-  opencode-claude-auth = pkgs.stdenv.mkDerivation {
-    pname = "opencode-claude-auth";
-    version = "0.5.7";
-    src = pkgs.fetchurl {
-      url = "https://registry.npmjs.org/opencode-claude-auth/-/opencode-claude-auth-0.5.7.tgz";
-      hash = "sha256-uGrh/hkXUCAL9m2fu6Tj0cPTvSOiY1ZEYT7m3ccHmrs=";
-    };
-    unpackPhase = ''
-      tar xzf $src
-    '';
-    installPhase = ''
-      mkdir -p $out
-      cp -r package/dist/* $out/
-    '';
-  };
 in
 {
   home.packages = [
@@ -76,8 +60,6 @@ in
   xdg.configFile."opencode/plugins/oh-my-opencode.js".source =
     "${oh-my-opencode-pkg}/lib/oh-my-opencode/dist/index.js";
 
-  xdg.configFile."opencode/plugins/opencode-claude-auth".source = opencode-claude-auth;
-
   xdg.configFile."opencode/skills/playwright.md".text =
     let
       browsers = pkgs.playwright-driver.browsers;
@@ -193,7 +175,7 @@ in
       autoshare = false;
       autoupdate = false;
       agent = { };
-      plugin = [ ];
+      plugin = [ "opencode-claude-auth" ];
       provider = {
         openrouter = {
           models = {

system/networking.nix

@@ -9,7 +9,7 @@
     networkmanager = {
       enable = true;
 
-      insertNameservers = [
+      appendNameservers = [
         "1.1.1.1"
         "9.9.9.9"
       ];