Bump version to 1.4.1 and tighten client handling

src/web/public/js/dashboard/dashboard-page.js

@@ -399,7 +399,14 @@
     }).then(function (response) {
       if (!response.ok) {
         return response.text().then(function (text) {
-          throw new Error(text || 'Unable to rename client.');
+          var message = text || 'Unable to rename client.';
+          try {
+            var payload = JSON.parse(text);
+            message = payload && (payload.error || payload.message) ? String(payload.error || payload.message) : message;
+          } catch (_error) {
+            // fall back to the raw text body
+          }
+          throw new Error(message);
         });
       }
       return response.json().catch(function () {

src/web/public/js/toast.js

@@ -40,7 +40,7 @@
 
   function getMessageVariant(message, fallbackVariant) {
     var text = String(message || '').trim();
-    if (/^(unable to delete|cannot delete|can't delete)/i.test(text)) {
+    if (/^(unable to delete|cannot delete|can't delete)|\bstill (?:in use|linked|assigned|used)\b/i.test(text)) {
       return 'danger';
     }
     return String(fallbackVariant || 'success').trim().toLowerCase() || 'success';