Fix: Use @shared/* alias instead of relative paths for Docker compat

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-lehrer/app/(admin)/ai/ocr-labeling/types.ts

@@ -1 +1 @@
-export * from '../../../../../shared/types/ocr-labeling'
+export * from '@shared/types/ocr-labeling'

admin-lehrer/app/(admin)/education/klausur-korrektur/[klausurId]/[studentId]/_components/workspace-types.ts

@@ -12,13 +12,13 @@ export type {
   ActiveTab,
   GradeTotals,
   CriteriaScores,
-} from '../../../../../../../../shared/types/klausur'
+} from '@shared/types/klausur'
 
 export {
   WORKFLOW_STATUS_LABELS,
   ROLE_LABELS,
   GRADE_LABELS,
-} from '../../../../../../../../shared/types/klausur'
+} from '@shared/types/klausur'
 
 /** Same-origin proxy to avoid CORS issues */
 export const API_BASE = '/klausur-api'

admin-lehrer/app/(admin)/education/klausur-korrektur/_components/types.ts

@@ -8,4 +8,4 @@ export type {
   VorabiturEHForm,
   EHTemplate,
   DirektuploadForm,
-} from '../../../../../../shared/types/klausur'
+} from '@shared/types/klausur'

admin-lehrer/app/(admin)/education/klausur-korrektur/types.ts

@@ -1 +1 @@
-export * from '../../../../../shared/types/klausur'
+export * from '@shared/types/klausur'