Update static/appS.js

static/appS.js

@@ -168,10 +168,16 @@ document.addEventListener('DOMContentLoaded', () => {
                 body: formData
             });
 
-            if (!response.ok) {
-                const error = await response.json();
-                throw new Error(error.detail || 'Request failed');
-            }
+           if (!response.ok) {
+    let errorMessage = 'Request failed';
+    try {
+        const error = await response.json();
+        errorMessage = error.detail || error.error || errorMessage;
+    } catch (e) {
+        // Response wasn't valid JSON
+    }
+    throw new Error(errorMessage);
+}
 
             const result = await response.json();
             thinkingBubble.remove();