[split-required] Split 58 monoliths across Python, Go, TypeScript (Phases 1-3)

Phase 1 — Python (klausur-service): 5 monoliths → 36 files
- dsfa_corpus_ingestion.py (1,828 LOC → 5 files)
- cv_ocr_engines.py (2,102 LOC → 7 files)
- cv_layout.py (3,653 LOC → 10 files)
- vocab_worksheet_api.py (2,783 LOC → 8 files)
- grid_build_core.py (1,958 LOC → 6 files)

Phase 2 — Go (edu-search-service, school-service): 8 monoliths → 19 files
- staff_crawler.go (1,402 → 4), policy/store.go (1,168 → 3)
- policy_handlers.go (700 → 2), repository.go (684 → 2)
- search.go (592 → 2), ai_extraction_handlers.go (554 → 2)
- seed_data.go (591 → 2), grade_service.go (646 → 2)

Phase 3 — TypeScript (admin-lehrer): 45 monoliths → 220+ files
- sdk/types.ts (2,108 → 16 domain files)
- ai/rag/page.tsx (2,686 → 14 files)
- 22 page.tsx files split into _components/ + _hooks/
- 11 component files split into sub-components
- 10 SDK data catalogs added to loc-exceptions
- Deleted dead backup index_original.ts (4,899 LOC)

All original public APIs preserved via re-export facades.
Zero new errors: Python imports verified, Go builds clean,
TypeScript tsc --noEmit shows only pre-existing errors.

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

admin-lehrer/components/grid-editor/gridTableUtils.ts

@@ -0,0 +1,43 @@
+import type { GridEditorCell, GridZone } from './types'
+import { MIN_ROW_HEIGHT } from './gridTableConstants'
+
+/** Dominant non-black color from a cell's word_boxes, or null.
+ *  `color_override` takes priority when set. */
+export function getCellColor(cell: GridEditorCell | undefined): string | null {
+  if (!cell) return null
+  // Manual override: explicit color or null (= "clear color bar")
+  if (cell.color_override !== undefined) return cell.color_override ?? null
+  if (!cell.word_boxes?.length) return null
+  for (const wb of cell.word_boxes) {
+    if (wb.color_name && wb.color_name !== 'black' && wb.color) {
+      return wb.color
+    }
+  }
+  return null
+}
+
+/** Compute the rendered height for a row in px. */
+export function getRowHeight(
+  zone: GridZone,
+  rowIndex: number,
+  isHeader: boolean,
+  avgRowHeightPx: number,
+  scale: number,
+): number {
+  const row = zone.rows.find((r) => r.index === rowIndex)
+  if (!row) return Math.max(MIN_ROW_HEIGHT, avgRowHeightPx * scale)
+
+  // Multi-line cells (containing \n): expand height based on line count
+  const rowCells = zone.cells.filter((c) => c.row_index === rowIndex)
+  const maxLines = Math.max(1, ...rowCells.map((c) => (c.text ?? '').split('\n').length))
+  if (maxLines > 1) {
+    const lineH = Math.max(MIN_ROW_HEIGHT, avgRowHeightPx * scale)
+    return lineH * maxLines
+  }
+
+  if (isHeader) {
+    const measuredH = row.y_max_px - row.y_min_px
+    return Math.max(MIN_ROW_HEIGHT, measuredH * scale)
+  }
+  return Math.max(MIN_ROW_HEIGHT, avgRowHeightPx * scale)
+}