feat: enhance exam loading functionality with examId support and update UI components

frontend/src/components/Workspace.tsx

@@ -4,6 +4,7 @@ import { useTranslation } from 'react-i18next'
 import { useAuth } from '../contexts/AuthContext'
 import * as examApi from '../api/examApi'
 import * as resultApi from '../api/resultApi'
+import type { Exam } from '../types'
 import MyExams from './MyExams'
 import MyResults from './MyResults'
 import Settings from './Settings'
@@ -16,7 +17,11 @@ const TAB_KEYS: { key: TabKey; labelKey: string; icon: string }[] = [
   { key: 'settings', labelKey: 'workspace.settings', icon: '⚙' },
 ]
 
-export default function Workspace() {
+interface Props {
+  onLoadExam: (exam: Exam, saveToWorkspace?: boolean, examId?: number | null) => void
+}
+
+export default function Workspace({ onLoadExam }: Props) {
   const { t } = useTranslation()
   const { user, loading: authLoading } = useAuth()
   const navigate = useNavigate()
@@ -77,7 +82,7 @@ export default function Workspace() {
       </aside>
 
       <main className="workspace-main">
-        {activeTab === 'exams' && <MyExams />}
+        {activeTab === 'exams' && <MyExams onLoadExam={onLoadExam} />}
         {activeTab === 'results' && <MyResults />}
         {activeTab === 'settings' && <Settings />}
       </main>