feat(ocr-pipeline): manual column editor for Step 3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-lehrer/components/ocr-pipeline/ColumnControls.tsx

@@ -6,6 +6,7 @@ import type { ColumnResult, ColumnGroundTruth, PageRegion } from '@/app/(admin)/
 interface ColumnControlsProps {
   columnResult: ColumnResult | null
   onRerun: () => void
+  onManualMode: () => void
   onGroundTruth: (gt: ColumnGroundTruth) => void
   onNext: () => void
   isDetecting: boolean
@@ -39,7 +40,7 @@ const METHOD_LABELS: Record<string, string> = {
   position_fallback: 'Fallback',
 }
 
-export function ColumnControls({ columnResult, onRerun, onGroundTruth, onNext, isDetecting }: ColumnControlsProps) {
+export function ColumnControls({ columnResult, onRerun, onManualMode, onGroundTruth, onNext, isDetecting }: ColumnControlsProps) {
   const [gtSaved, setGtSaved] = useState(false)
 
   if (!columnResult) return null
@@ -69,6 +70,12 @@ export function ColumnControls({ columnResult, onRerun, onGroundTruth, onNext, i
         >
           Erneut erkennen
         </button>
+        <button
+          onClick={onManualMode}
+          className="text-xs px-2 py-1 bg-teal-100 text-teal-700 dark:bg-teal-900/30 dark:text-teal-400 rounded hover:bg-teal-200 dark:hover:bg-teal-900/50 transition-colors"
+        >
+          Manuell markieren
+        </button>
       </div>
 
       {/* Column list */}