Fix: Revert to inline shared types (Turbopack can't resolve path aliases)

Turbopack doesn't support tsconfig path aliases pointing outside
the project root. Reverted to copying shared types directly into
each service. The canonical source remains shared/types/*.ts,
synced via scripts/sync-shared-types.sh.

Changes:
- Reverted docker-compose.yml contexts to ./service
- Reverted Dockerfiles to simple COPY . .
- Removed @shared/* from tsconfigs
- Removed symlinks + .gitignore hacks
- Added scripts/sync-shared-types.sh for keeping copies in sync

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

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

@@ -1 +1,127 @@
-export * from '@shared/types/ocr-labeling'
+/**
+ * Shared TypeScript types for OCR Labeling UI.
+ *
+ * Single source of truth used by:
+ *   - admin-lehrer  (ai/ocr-labeling)
+ *   - website       (admin/ocr-labeling)
+ */
+
+/**
+ * Available OCR Models
+ *
+ * - llama3.2-vision:11b: Vision LLM, beste Qualitaet bei Handschrift (Standard)
+ * - trocr: Microsoft TrOCR, schnell bei gedrucktem Text
+ * - paddleocr: PaddleOCR + LLM, 4x schneller durch Hybrid-Ansatz
+ * - donut: Document Understanding Transformer, strukturierte Dokumente
+ */
+export type OCRModel = 'llama3.2-vision:11b' | 'trocr' | 'paddleocr' | 'donut'
+
+export const OCR_MODEL_INFO: Record<OCRModel, { label: string; description: string; speed: string }> = {
+  'llama3.2-vision:11b': {
+    label: 'Vision LLM',
+    description: 'Beste Qualitaet bei Handschrift',
+    speed: 'langsam',
+  },
+  trocr: {
+    label: 'Microsoft TrOCR',
+    description: 'Schnell bei gedrucktem Text',
+    speed: 'schnell',
+  },
+  paddleocr: {
+    label: 'PaddleOCR + LLM',
+    description: 'Hybrid-Ansatz: OCR + Strukturierung',
+    speed: 'sehr schnell',
+  },
+  donut: {
+    label: 'Donut',
+    description: 'Document Understanding fuer Tabellen/Formulare',
+    speed: 'mittel',
+  },
+}
+
+export interface OCRSession {
+  id: string
+  name: string
+  source_type: 'klausur' | 'handwriting_sample' | 'scan'
+  description?: string
+  ocr_model?: OCRModel
+  total_items: number
+  labeled_items: number
+  confirmed_items: number
+  corrected_items: number
+  skipped_items: number
+  created_at: string
+}
+
+export interface OCRItem {
+  id: string
+  session_id: string
+  session_name: string
+  image_path: string
+  image_url?: string
+  ocr_text?: string
+  ocr_confidence?: number
+  ground_truth?: string
+  status: 'pending' | 'confirmed' | 'corrected' | 'skipped'
+  metadata?: Record<string, unknown>
+  created_at: string
+}
+
+export interface OCRStats {
+  total_sessions?: number
+  session_id?: string
+  name?: string
+  total_items: number
+  labeled_items: number
+  confirmed_items: number
+  corrected_items: number
+  skipped_items?: number
+  pending_items: number
+  exportable_items?: number
+  accuracy_rate: number
+  avg_label_time_seconds?: number
+  progress_percent?: number
+}
+
+export interface TrainingSample {
+  id: string
+  image_path: string
+  ground_truth: string
+  export_format: 'generic' | 'trocr' | 'llama_vision'
+  training_batch: string
+  exported_at?: string
+}
+
+export interface CreateSessionRequest {
+  name: string
+  source_type: 'klausur' | 'handwriting_sample' | 'scan'
+  description?: string
+  ocr_model?: OCRModel
+}
+
+export interface ConfirmRequest {
+  item_id: string
+  label_time_seconds?: number
+}
+
+export interface CorrectRequest {
+  item_id: string
+  ground_truth: string
+  label_time_seconds?: number
+}
+
+export interface ExportRequest {
+  export_format: 'generic' | 'trocr' | 'llama_vision'
+  session_id?: string
+  batch_id?: string
+}
+
+export interface UploadResult {
+  id: string
+  filename: string
+  image_path: string
+  image_hash: string
+  ocr_text?: string
+  ocr_confidence?: number
+  status: string
+}