fix(glyph): use correct module path for opencode-claude-auth plugin

The nix store path points to the package root, but Bun needs the
actual node module path under lib/node_modules/.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: stackptr

hosts/glyph/home.nix

@@ -19,7 +19,7 @@
       enabled_providers = ["anthropic"];
       autoupdate = false;
       share = "disabled";
-      plugin = ["${pkgs.opencode-claude-auth}"];
+      plugin = ["${pkgs.opencode-claude-auth}/lib/node_modules/opencode-claude-auth"];
     };
   };