Workspace white screen error resolved, issue was when we migrated from the local SQLite database to the Client-Server architecture during Phase 2, we didn't implement backend endpoints for adding, updating, or deleting users. Because the app.jsx file had nowhere to send those requests, the buttons didn't do anything

screens.jsx

@@ -626,7 +626,7 @@ function FilterChip({ on, onClick, children }) {
   );
 }
 
-function SettingsScreen({ user, isAdmin, onClose, onSave, onLogout, onSwitchUser, onCreateUser, onDeleteUser, onUpdateUserRole }) {
+function SettingsScreen({ user, dbUsers, isAdmin, onClose, onSave, onLogout, onSwitchUser, onCreateUser, onDeleteUser, onUpdateUserRole }) {
   const [name, setName] = React.useState(user.name);
   const [role, setRole] = React.useState(user.role);
   const [photo, setPhoto] = React.useState(user.photo || null);
@@ -804,7 +804,7 @@ function SettingsScreen({ user, isAdmin, onClose, onSave, onLogout, onSwitchUser
 
           {tab === 'workspace' && (
             <WorkspaceTab
-              user={user} isAdmin={isAdmin}
+              user={user} isAdmin={isAdmin} dbUsers={dbUsers}
               onSwitchUser={onSwitchUser}
               onCreateUser={onCreateUser}
               onDeleteUser={onDeleteUser}
@@ -829,7 +829,7 @@ function ToggleRow({ label, defaultOn = false }) {
   );
 }
 
-function WorkspaceTab({ user, isAdmin, dbUsers, onSwitchUser, onCreateUser, onDeleteUser, onUpdateUserRole }) {
+function WorkspaceTab({ user, isAdmin, dbUsers = [], onSwitchUser, onCreateUser, onDeleteUser, onUpdateUserRole }) {
   const [adding, setAdding] = React.useState(false);
   const [newName, setNewName] = React.useState('');
   const [newRole, setNewRole] = React.useState('');