fix: remove nested scrollbar in grid editor

Removed overflow-y-auto and maxHeight from the grid container div.
The page itself handles scrolling — nested scroll containers caused
the bottom rows to be cut off after editing.

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

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

@@ -314,7 +314,7 @@ export function StepGridReview({ sessionId, onNext, saveRef }: StepGridReviewPro
         )}
 
         {/* Right: Grid with row-accept buttons */}
-        <div className="space-y-3 overflow-y-auto" style={{ maxHeight: 'calc(100vh - 200px)' }}>
+        <div className="space-y-3">
 
           {/* Zone tables with row-accept buttons */}
           {(() => {