diff --git a/src/main/mesh.js b/src/main/mesh.js
index 4be11664..ad13568e 100644
--- a/src/main/mesh.js
+++ b/src/main/mesh.js
@@ -812,6 +812,11 @@ async function cmms_load_from_url(config) {
         boot_done();
         handles.setEnabled(api.prefs.map.space.bounds ?? false);
         broker.publish("app_ready");
+        // The normal boot path applies dark/light mode inside restore_space(),
+        // which this CMMS-scoped launch deliberately skips - so do it here.
+        // config.dark comes from the CMMS host's theme_is_dark() (cmms_dark
+        // query param); default dark for a non-CMMS/direct launch.
+        set_darkmode(config.dark ?? true);
     }
 }