Add structured logging and better error handling

web/static/js/settings.js

@@ -1,4 +1,4 @@
-import { api } from "./api.js";
+import { api, describeError } from "./api.js";
 import { element } from "./dom.js";
 import { notificationsEnabled, setNotificationsEnabled } from "./notify.js";
 
@@ -77,7 +77,7 @@ async function saveSettings(event, onSaved) {
     fields.dialog.close();
     onSaved(data.settings);
   } catch (error) {
-    fields.error.textContent = error.message;
+    fields.error.textContent = describeError(error);
   }
 }