Fix jwt-token

client/src/pages/Devices.jsx

@@ -555,16 +555,30 @@ const DeviceModal = ({ device, onClose, onSave }) => {
 
     try {
       if (device) {
-        // Update existing device - exclude read-only fields
+        // Update existing device - exclude read-only fields and filter out empty strings
         const updateData = {
           name: formData.name,
-          location_description: formData.location_description,
-          notes: formData.notes
+          location_description: formData.location_description || null,
+          notes: formData.notes || null
         };
+        
+        // Remove null values to avoid sending unnecessary data
+        Object.keys(updateData).forEach(key => {
+          if (updateData[key] === null || updateData[key] === '') {
+            delete updateData[key];
+          }
+        });
+        
         await api.put(`/devices/${device.id}`, updateData);
       } else {
-        // Create new device - include all fields
-        await api.post('/devices', formData);
+        // Create new device - include all fields, convert empty strings to null
+        const createData = { ...formData };
+        Object.keys(createData).forEach(key => {
+          if (createData[key] === '') {
+            createData[key] = null;
+          }
+        });
+        await api.post('/devices', createData);
       }
       onSave();
     } catch (error) {